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Journal articles on the topic 'Longitudinal river profile'
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1
Leonid, A. Turykin, M. Berkovich Konstantin, and V. Zlotina Leonora. "The developed (graded) longitudinal profile simulation in the river section (a case study of the Upper Oka River)." GEOGRAPHY AND TOURISM 5, no. 2 (2017): 75–81. https://doi.org/10.5281/zenodo.1118173.
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A method of simulating the developed longitudinal profile for a selected river section is proposed. The method is based on the concept of a longitudinal river profile, developed by N.I. Makkaveev. The developed longitudinal profile of the Oka River is calculated from the city of Kaluga to the Beloomut lock/dam. The calculation is performed using an equation of non-uniform flow motion and one of the developed longitudinal profile stage criteria – the constancy of the QI product along the river section (Q is average multiannual water discharge, I is a hydraulic slope). The obtained results show that the developed longitudinal profile of the water surface can serve as an important indicator of the trends of channel processes, not only in theoretical studies but also in solving practical problems of hydrological surveys, for example, when calculating the profile of terminal erosion, assessing the possible lowering of water levels.
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Silva, Rubens Neves e., Daniel Dantas Moreira Gomes, Carlos Eduardo Santos de Lima, and Mauricio Costa Goldfarb. "Uso do índice RDE para determinação de anomalias de drenagem no Rio Capibaribe (PE)." Revista Eletrônica em Gestão, Educação e Tecnologia Ambiental 20, no. 1 (2016): 552. http://dx.doi.org/10.5902/2236117019951.
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The longitudinal profile of a river is the Cartesian representation of the relationship between its height and its length. This relationship has been used as an important element for geomorphological and hydrological studies; example studies to determine the drainage anomalies. This study aimed to the determination and classification of river Capibaribe (PE) drainage anomalies. The analysis was made from the longitudinal profile of the Capibaribe river, built with the help of Google Earth software, through the RDE index proposed by Hack (1973). The longitudinal profile of the Capibaribe river is relatively balanced and contains anomalies second and first order. This profile presented an atypical geometry stretches in between kilometers 100 and 150, 150 and 200 and 200 and 250 due to the increase of the slope in the direction from upstream to downstream, as the literature indicates that in a typical profile should decrease in the slopes towards the mouth.
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Choo, Yeon-Moon, Ji-Min Kim, and Ik-Tae An. "Research on the Longitudinal Section of River Restoration Using Probabilistic Theory." Entropy 23, no. 8 (2021): 965. http://dx.doi.org/10.3390/e23080965.
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Since the 1960s, many rivers have been destroyed as a consequence of the process of rapid urbanization. As accurate figures are important to repair rivers, there have been many research reports on methods to obtain the exact river slope and elevation. Until now, many research efforts have analyzed the river using measured river topographic factors, but when the flow velocity changes rapidly, such as during a flood, surveying is not easy; and due to cost, frequent measurements are difficult. Previous research has focused on the cross section of the river, so the information on the river longitudinal profile is insufficient. In this research, using informational entropy theory, equations are presented that can calculate the average river slope, river slope, and river longitudinal elevation for a river basin in real time. The applicability was analyzed through a comparison with the measured data of river characteristic factors obtained from the river plan. The parameters were calculated using informational entropy theory and nonlinear regression analysis using actual data, and then the longitudinal elevation entropy equation for each river and the average river slope were calculated. As a result of analyzing the applicability of the equations presented in this study by R2 and Root Mean Square Error, all R2 values were over 0.80, while RMSE values were analyzed to be between 0.54 and 2.79. Valid results can be obtained by calculating river characteristic factors.
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Hamza, Vijith, V. Prasannakumar, and P. Pratheesh. "Modelling and interpretation of channel profile anomalies through stream length gradient (SL) indexes and GIS: A case study from the Vamanapuram River, Kerala, India." Environmental Research, Engineering and Management 75, no. 2 (2019): 60–73. http://dx.doi.org/10.5755/j01.erem.75.2.21300.
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Longitudinal profile of the Vamanapuram River and its five major tributaries was characterized to detect anomalies in terms of knick points through the calculation of stream length gradient (SL) indexes. Longitudinal profiles show presence of knick points in different reaches, indicating changes from the graded smooth concave profile to ungraded convex profile. The ungraded profile segments were confirmed by high SL indexes having sudden changes in values than the adjacent segments and those exactly fitted with the ungraded profile segments. The SL anomaly index is capable of expressing the stream profile anomalies in terms of its severity and to classify the river segments into different orders of anomalies. Higher order SL anomalies are mostly in the midland and lower regions than the headwaters region and are in uniform lithology and are unrelated to the map-scale structural features present in the river basin. The present study points to differential effect of geological process in the middle and lower reaches of the watershed in which the tributaries responded more than the major river. Past seismic events in the region confirm the role of neotectonic processes, which might have influenced the streams by changing the graded base level. Detailed field investigations of the anomalous stream segments can help to identify and understand the imprints caused due to neotectonic activity.
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Berkovich, K. M., L. V. Zlotina, and L. A. Turykin. "Vertical riverbed deformations due to in-stream mining." Геоморфология и палеогеография 55, no. 1 (2024): 5–12. http://dx.doi.org/10.31857/s2949178924010016.
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Comparison of the longitudinal profile of a number of lowland rivers in Russia, revealed their deformation due to a half-century of sediment flux and channel morphology adjustment. This problem remains relevant both in theoretical and practical aspects, especially for rivers where long-term mining of sediments from the stream beds extends from kilometers to tens of kilometers. The removal of a large amount of alluvial material from the sediments transport and changes of the riverbed morphometric characteristics triggered the process of leveling the sediment transport capacity along the river by the scour and resulted in a lowering of the bottom and water surface. The intensity of the incision reached 3–8 centimeters, and its progradation along the river 400–700 meters per year. Retrogressive erosion is pronounced, while progressive one is less pronounced, because partially replaced by mechanical removal of alluvial material. Over the past decades the shape of the longitudinal profiles changed from convex or straight to concave with no signs of recovery, despite the mining has been quite moderate for last 30 years or completed on the explored rivers.
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Li, Yan Hong, and Li Quan Xie. "2-D CFD Model for Free Surface River Flow with Tilt Rigid Leave of Submerged Vegetation." Applied Mechanics and Materials 212-213 (October 2012): 332–35. http://dx.doi.org/10.4028/www.scientific.net/amm.212-213.332.
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Keywords: river flow; two-dimensional CFD model; velocity profile; submerged vegetation leave Abstract. River flow with submerged foliage vegetation in straight and rectangular cross-sectional channel is numerically simulated through a vertical two-dimensional CFD model. Tilt thin strips are assigned in river flow to mimic the configuration of vegetation leave. The free surface line and the vertical profiles of longitudinal velocity are presented. The vertical velocity profile differs from the well acknowledged logarithmic or semi-logarithmic law. The submerged leave canopy resist the flow through it and pilots the flow upward over it, resulting in a decreased velocity within the canopy and an increased velocity above the canopy. The velocity profiles within the leave canopy are impacted by the configurations of the leave.
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Kumar, Anil, and Pradeep Srivastava. "The role of climate and tectonics in aggradation and incision of the Indus River in the Ladakh Himalaya during the late Quaternary." Quaternary Research 87, no. 3 (2017): 363–85. http://dx.doi.org/10.1017/qua.2017.19.
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AbstractThe geomorphic evolution of the upper Indus River that traverses across the southwest (SW) edge of Tibet, and the Ladakh and Zanskar ranges, was examined along a ~350-km-long stretch of its reaches. Based on the longitudinal river profile, stream length gradient index, and river/strath terraces, this stretch of the river is divided into four segments. Valley fill river terraces are ubiquitous, and strath terraces occur in the lower reaches where the Indus River cuts through deformed Indus Molasse. Optically stimulated luminescence ages of river/strath terraces suggest that valley aggradation occurred in three pulses, at ~52, ~28, and ~16 ka, and that these broadly coincide with periods of stronger SW Indian summer monsoon. Reconstructed longitudinal river profiles using strath terraces provide an upper limit on the bedrock and provide incision rates ranging from 1.0±0.3 to 2.2±0.9 mm/a. These results suggested that rapid uplift of the western syntaxes aided by uplift along the local faults led to the formation of strath terraces and increased fluvial incision rates along this stretch of the river.
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Sharma, M. P., S. K. Singal, and S. Patra. "Water Quality Profile of Yamuna River, India." Hydro Nepal: Journal of Water, Energy and Environment 3 (May 26, 2009): 19–24. http://dx.doi.org/10.3126/hn.v3i0.1914.
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The water quality profile of a river represents the extent of its pollution in terms of health of a river with respect to its longitudinal direction. This paper deals with the water quality profile of north India’s Yamuna river using physico-chemical and bacteriological parameters that converge into a single value NSF WQI. The water quality map of the river has been prepared showing that the Delhi stretch is highly polluted due to dumping of waste and discharge of untreated sewage and industrial effluents. The water quality map is a useful tool for policy makers, decision makers and environmentalists to suggest and implement appropriate conservation measures to improve the health of the water body.Key words: Water quality; pollution; river profile; indices; mapping; Indiadoi: 10.3126/hn.v3i0.1914Hydro Nepal Journal of Water, Energy and Environment Issue No. 3, July 2008. Page: 19-24
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Cui, Y., L. Chen, M. Li, and Z. Men. "THE STUDY OF WATERSHED TOPOGRAPHY CHARACTERISTICS IN VAKHSH RIVER BASED ON ZY3-DSM." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3 (April 30, 2018): 245–51. http://dx.doi.org/10.5194/isprs-archives-xlii-3-245-2018.
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The Vakhsh River is one of the major rivers in Tajikistan. The quantitative analysis of watershed topography and developmental characteristics in Vakhsh River catchment can reflect the morphological characteristics of the region, which is of great significance for revealing the quantitative relationship between the hydrological and the geomorphological process. In this paper, the D8 algorithm and the spatial analysis method were used to extract the river networks, the catchment boundary profile lines and the longitudinal valley profile lines of the four major tributaries in the Vakhsh River from the ZY3-DSM of 10 meters resolution. On this basis, five quantitative indices including the frequency of wave, amplitude of wave, gully density, the longitudinal slope and roundness rate were used to analyze the watershed landform and its development degree. According to the experimental results, the catchment have a high surface complexity and a mature landform. Yovonsu river catchment which is in the downstream of Vakhsh River is oval and has low terrain complexity with large frequency and small amplitude. Among the midstream and upstream, the Mukson River has developed into geriatric terrain that is the most mature and has the highest surface complex, while the Obikhingon River and the Kizilsu River have developed into a stable maternal terrain. In terms of topography, the boundary elevation of the Obikhingon is basically in accordance with the normal distribution, while the Kizilsu and the Muksu show a peak state with elevations of 4,000–5,000 m and 5,000–5,500 m, respectively.
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Morton, R., and RB Cunningham. "Longitudinal profile of trends in salinity in the river Murray." Soil Research 23, no. 1 (1985): 1. http://dx.doi.org/10.1071/sr9850001.
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Statistical analyses have been performed on series of electrical conductivity (EC) measurements taken over the past 16 years from 8 stations on the River Murray to assess changes in salinity along the river and trends over time. Below Euston, N.S.W., salinity has generally increased over time, although the log-linear trends were statistically significant at only three stations: Red Cliffs, Morgan and Mannum. The increase in EC of over 1% p.a. at Red Cliffs was partly removed when it passed to Merbein, and we attribute this to the Lake Hawthorn salinity interception scheme. Both Morgan and Mannum showed increases of over 2% p.a., confirming the results of our earlier analysis of chloride data from Morgan, and current levels there are close to the desirable limit of 800 �S/cm. Thus major adverse effects can be anticipated if the rate of increase over the last 16 years is allowed to continue.
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Kovács, Á., Zs Kozma, V. Istvánovics, and M. Honti. "Phosphorus retention patterns along the Tisza River, Hungary." Water Science and Technology 59, no. 2 (2009): 391–97. http://dx.doi.org/10.2166/wst.2009.888.
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The aim of this study was to assess in-stream retention of suspended solids (SS) and total phosphorus (TP) at low flow condition in a large watercourse, the Tisza River. The analysis was based on a longitudinal water quality profile obtained in July 2006 during a cruise along the Hungarian section of the river (nearly 600 km). Water samples were taken manually for SS and TP every half an hour (ca. 5.5 km). Additionally, concentration of SS was calculated from on-line turbidity records taken every 6 s (ca. 10 m). Velocity field was calculated with a 1D hydrodynamic model calibrated for low flow conditions. To describe the transport, a simple first-order equation was adjusted to the SS profile after estimating the potential maximum of SS that the flow with the given velocity could transport. Specific P content of SS was related to velocity to estimate longitudinal TP profile. Retention of TP amounted to 42% along the Hungarian section of the Tisza River at a flow of 110 m3 s−1. Storage reservoirs significantly influenced the longitudinal retention pattern. Upstream of Dam II (river kilometre 404), net TP retention reached 73%, while the downstream section was a source of TP.
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Chen, Lu, and Qinghong Ran. "The bedrock river profile fitting and the indicative significance: a case study in Gyirong watershed of the Middle Himalaya." Advances in Engineering Technology Research 4, no. 1 (2023): 312. http://dx.doi.org/10.56028/aetr.4.1.312.2023.
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Area-slope (AS) Model focuses on quantitative study of bedrock river which has been widely used in the longitudinal profile simulation of bedrock and alluvial rivers, but many applications have failed to carefully consider the mechanism, fitting effect and applicability, resulting in unsatisfactory simulation results. In order to verify the channel profile analysis capability, the study analyzes the oretical basis of AS model and applies to the river channel fitting and knickpoint identification in the Gyirong Watershed in the middle Himalayan Orogen. The results show that, for rivers with different equilibrium status, the fitting curves have different splattering patterns. More than 80% knckpoints locate on the elevation between 4000 –5050 m where coincided with Tibetan Himalayan Unit. Although climate affects the spatial distribution of knickpoints, the structure of Gyirong watershed have developed before modern climate pattern.
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Burmistrova, O. S., and L. V. Yanygina. "Longitudinal variability in the zooplankton community of the upper Ob river." Ukrainian Journal of Ecology 9, no. 3 (2019): 367–70. http://dx.doi.org/10.15421/2019_108.
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Zooplankton is important component of aquatic ecosystems playing the essential role in organic matter circulation and self-purification of water bodies. Current data on zooplankton from one of the largest rivers in the world, i.e. the Ob river, is very fragmentary and cover small areas adjacent to large settlements. This paper presents the results of the zooplankton study of the 458-km stretch of the Ob river – from its source (Fominskoye village) up to the site above the Novosibirsk reservoir (Taradanovo village). To assess the longitudinal distribution of zooplankton, we collected samples from 17 river sections in different phases of a hydrological cycle, i.e. during the periods of flood (May–June) and summer low water (July–August) 2016. A total of 103 species and forms of zooplankton were detected. Rotifera dominated in species number. In various river parts and hydrological cycle phases, species number, abundance and biomass of zooplankton differed significantly. Their maximum typically fell on the period of summer low water. Abundance and biomass of zooplankton tended to increase downstream. In most parts of the river, Rotifers was dominant in number, whereas copepods – in biomass (juvenile stages). Zooplankton distribution along the transversal profile of the river was characterized by the increased species number, abundance and biomass near the right bank (unlike the left one) that is, probably, due to the floodplain appearance on the right bank. An increase in zooplankton abundance was also observed in sites with a low flow velocity (river bays) and below the large tributaries. The assessment of water quality in the study site of the Ob river was performed based on the zooplankton composition and structure. A saprobic index for zooplankton is evidence of oligo- betamesosaprobic conditions.
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Zimmermann-Timm, Heike, Marcus Hoberg, Holst Henry, and Stefan Müller. "Estuarine aggregates in the longitudinal profile of the River Elbe: seasonal changes in occurrence, characteristics and colonization." River Systems 13, no. 3-4 (2002): 263–83. http://dx.doi.org/10.1127/lr/13/2002/263.
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França Junior, Pedro, and Ordilei Aparecido Gaspar de Melo. "A Utilização dos Perfis Longitudinal Transversais para Estudos Geomorfológicos na Bacia do Córrego Pinhalzinho II Noroeste do Paraná/ Brasil (The Use of Profiles Transverse to Longitudinal Studies in the Basin Geomorphological Pinhalzinho II Stream...)." Revista Brasileira de Geografia Física 4, no. 4 (2013): 748. http://dx.doi.org/10.26848/rbgf.v4i4.232690.
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Os perfis longitudinal e transversal apresentam-se como representações, retratando a diferenças do gradiente do canal e fisiologia das vertentes. Desta forma neste artigo objetiva-se apresentar as técnicas de representação geomorfológicas através dos perfis longitudinal e transversais utilizando a bacia hidrográfica do córrego Pinhalzinho II na região Noroeste do Paraná como base. As representações do relevo ajudam na compreensão dos fenômenos meteorológicos e hidrosedimentológicos que afetam os processos erosivos que reformulam novas feições do contexto da evolução da paisagem. As constatações verificadas demonstram que o perfil longitudinal da bacia, aplicando o índice RDE encontra-se parcialmente em equilíbrio, apresentando somente o trecho final de seu perfil em desajuste fluvial. Os perfis transversais possuem vertentes com convexidade e concavidades com segmentos retilíneos, caracterizando um relevo suave com dimensão interflúvial que atenua a forte incisão do vale apresentando baixa dissecação do relevo. Os estudos de representação geomorfológicos contribuem para a identificação de diversas variáveis ambientais, representadas pelos fenômenos tectônicos, sedimentares, e uso do solo de cada região aplicada.Palavras-chave: Análise morfométrica, Cartografia Geoambiental, perfil longitudinal, perfil transversal, índice de gradiente RDE. The Use of Profiles Transverse to Longitudinal Studies in the Basin Geomorphological Pinhalzinho II Stream Northwest of Paraná / Brazil ABSTRACTThe longitudinal and transverse profiles are presented as representations, depicting the differences of the channel gradient and physiological aspects. This article aims to present the techniques of representation through the geomorphological longitudinal and transverse profiles using the watershed stream Pinhalzinho II in the Northwest of Paraná as a basis. The representations of relief aid in the understanding of meteorological phenomena that affect the hydro-sedimentological and erosional processes revising new features of the context of the evolution of the local landscape. The findings show that the observed longitudinal profile of the basin, applying the index RDE is partially balanced, presenting only the final section of your profile misfit river. The transverse profiles are convex and concave slopes with straight segments, featuring a soft dimension with interfluvial that mitigates the strong incision of the valley dissection presenting low relief. Geomorphological studies of representation contribute to the identification of several environmental variables, represented by tectonic phenomena, sedimentary, and land use in each region applied.Keywords: morphometric analysis, Geoenvironmental Mapping, longitudinal profile, transverse profile, gradient index RDE.
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OBODOVSKYІ, O. G., V. O. KORNIIENKO та V. YU KUZMOCHKO. "АSSESSMENT OF VERTICAL CHANNEL DEFORMATIONS OF THE ТETEREV BASIN RIVERS". Hydrology, hydrochemistry and hydroecology, № 2 (68) (2023): 15–22. http://dx.doi.org/10.17721/2306-5680.2023.2.2.
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The investigation of vertical channel deformations of the main rivers of the Teteriv basin over the last 40 years according to the data of 6 hydrological stations was carried out. The prerequisite for this was the establishment of trends in changes in the water discharge of the considered watercourses. A general decrease of these indicators, especially the average and maximum flow indicators, was revealed. This is confirmed by previously conducted studies on water level fluctuations of the researched rivers. The results proved a universal increase in water levels for the rivers of the basin at fixed water discharge within the river banks. This is evidence that accumulation processes are observed on all explored riverbeds, although their intensity may be manifested in different ways. It is shown that modern vertical channel deformations characterize the accumulation of sediments in the riverbeds of the basin, the average intensity of which varies within 0.27-1.31 cm/year. In general, this trend is confirmed by the change in the longitudinal profiles of the rivers during the specified period, where in the areas where the hydrological stations are located, a slight shift of one relative to the other can be observed, with the prevailing height positions of the longitudinal profile for the year 2020. Comparative analysis of discrete (according to flow curves based on data from hydrological stations) and continuous (according to longitudinal profiles) estimates of vertical channel deformations makes it possible to more objectively establish the trends of their manifestations.
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Barabas, Dušan, and Matúš Tkáč. "Analysing riverbed morphology as a response to changes of geological and neotectonic conditions: A case study of the oľšava river." Quaestiones Geographicae 38, no. 3 (2019): 109–22. http://dx.doi.org/10.2478/quageo-2019-0033.
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Abstract The morphological examination of the Slovak Oľšava River channel and valley parameters is based on observation of changes in the troughs’ longitudinal profile. While the relationship between valley and channel parameters has previously been researched, establishment of the diverse conditions in trough formation enables better understanding of the basin/riverbed relationship. Our research is based on field measurements of representative sections of nine segments defined by changes in the longitudinal profile. The field measurements were performed in autumn months during a low water period to ensure the best conditions for repeated measurements. Significantly, as much as 75% asymmetry of the measured flow encourages the assumption of strong tectonic influence on the riverbed formation. While the difference between the assumed continuous changes of measured parameters and the actual measured or evaluated parameters remains a matter of interpretation, the detected anomalies enable interpretation of the parameters’ relationships. The river bed and the valley morphological parameters were evaluated on the model of The Olšava River basin which drains the eastern part of the Košická kotlina Basin (the Toryská pahorkatina Upland). The location of the basin at the foot of the Slanské vrchy Mts. is an important factor in the formation of the river network asymmetries. Both the Neogene contact between the Slanské vrchy Hills neo-volcanites and the Toryská pahorkatina Upland and the neo-tectonics influenced the change in morphological parameters in the valley’s longitudinal and transverse profile and the Oľšava river bed. Our terrain works comprised length and width measurements of the bars, their positions in the river bed, the width and depth of the channel and the type of section riffle. Available maps enabled calculation of the following; ratio of valley height to width, average gradient of the section, stream gradient index, average channel segment slope, the degree of sinuosity and the highest observed correlation between slope, river segment type (0.9576) and the width and type river reach (−0.9089). High correlation coefficient values were recorded for the valley height and width ratio, the type of river section, the water area and the total river bed width and area.
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Raharjo, Puguh Dwi, Eko Haryono, M. Anggri Setiawan, Haryadi Permana, and Ardhan Farisan. "Characteristics of entrenched meanders in catchment landscapes: a case study of Java, Indonesia." IOP Conference Series: Earth and Environmental Science 1233, no. 1 (2023): 012049. http://dx.doi.org/10.1088/1755-1315/1233/1/012049.
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Abstract The diversity of physiography on the island of Java reflects the existence of different landforms that have properties and characteristics in the interaction of river formation. Rivers respond to longitudinal profile deformation, one of which can form river meanders. Meander rivers in Java are formed on alluvial plains (free meanders) and in hilly areas (entrenched meanders). The meander river formation factor is the high flow volume, which can be seen from the morphometric conditions. This study aimed to determine the morphometric characteristics of water catchment in entrenched meander rivers on the island of Java, as well as its relationship with the geodynamic conditions. The method used is the identification of entrenched meander rivers on Java Island, and morphometric calculations are carried out; besides that, it is also associated with morphostructural conditions to determine the process of its formation. The results obtained that the catchment area of the entrenched meander river has a tendency for small volumes of water and relatively longer floods; this is different from the nature of the free meander. The morphostructure much controls the process of forming entrenched meander rivers.
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Souza, André de Oliveira, and Emerson Martins Arruda. "Análise da Rede de Drenagem na Bacia do Ribeirão dos Rodrigues: Anomalias, Índice RDE e Perfil Longitudinal (Analysis of Network Drainage on Watershed of Rodrigues River: Anomalies, Stream-Gradient Index and Longitudinal Stream Profile)." Revista Brasileira de Geografia Física 7, no. 3 (2014): 442–57. http://dx.doi.org/10.26848/rbgf.v7.3.p442-457.
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O desenvolvimento do relevo, assim como a espacialização dos cursos fluviais estão condicionados a diferentes fatores, no entanto aspectos relacionados à litologia e estrutura exercem grande influência no controle de uma bacia hidrográfica. Ao analisar a rede de drenagem de uma bacia hidrográfica a dinâmica geomorfológica quaternária do relevo pode ser interpretada sob o enfoque da Neotectônica, uma vez que os rios reagem a qualquer alteração no nível de base mesmo aqueles mais tênues característicos de áreas intraplaca. Sendo assim, técnicas de análise morfométricas fornecem importantes subsídios para estudos nesta perspectiva; neste sentido, o objetivo deste trabalho foi analisar a relação dos valores do índice RDE e dos padrões no Perfil Longitudinais com as anomalias de drenagem encontradas na bacia hidrográfica do Ribeirão dos Rodrigues, Serra dos Lopes-SP, a fim de entende os controles impostos sobre a drenagem. Foram aplicadas as técnicas mencionadas em três rios da bacia citada, sendo: o Ribeirão dos Rodrigues, o Córrego do Tanquinho e o Córrego do Sítio Velho. Os dois primeiros compreendem a transição entre litologias distintas e são seccionados pela Zona de Cisalhamento de Taxaquara e apresentaram diversos setores com valores altos do RDE e anomalias do Perfil Longitudinal; o ultimo rio está inteiramente no setor sedimentar da bacia e não tem influência direta da ZCTT, no entanto apresentou valores altos de RDE e anomalias no Perfil Longitudinal. A abordagem sistêmica norteou a integração das variáveis e análise dos resultados obtidos. A B S T R A C T The development of relief, as well as the spatial distribution are conditioned on different factors, however aspects related to lithology and structure have a great influence on the control of a watershed. The Quaternary geomorphological dynamics of relief can be interpreted trough concepts of neotectonic, focusing on the study of the waterways in a watershed, since the rivers react to some change in the base level, even the most subtle, characteristic of areas intraplate. Thus, measurement techniques provide important data for studies in this perspective, in this sense, the aim of this study was to analyze the relationship of the Stream Gradient-Index values and standard of Longitudinal Stream Profile with the drainage anomalies found in the Basin of Rodrigues River, Serra dos Lopes-SP, to identify neotectonics dynamics in the area. Were applied such techniques in three rivers in the basin mentioned: Rodrigues river, Tanquinho stream and Sítio Velho stream. The first two comprise the transition between different lithologies and are divided by Shear Zone Taxaquara and presented several sectors with high values of RDE and anomalies of the Longitudinal Stream Profile, the third river is entirely in the sector of sedimentary basin and has no direct influence of ZCTT, nevertheless also has shown high values of stream-gradient index and anomalies in longitudinal stream profile. The systemic approach guided the integration of variables and results analyzed. Keywords: Neotectonics, Morphometric Analysis; Watershed; Drainage Anomalies
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Oleszczuk, Ryszard, Janusz Urbański, and Monika Gąsowska. "The influence of morphological changes of small lowland river on discharge rate." Annals of Warsaw University of Life Sciences, Land Reclamation 46, no. 4 (2014): 279–90. http://dx.doi.org/10.1515/sggw-2015-0002.
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Abstract The influence of morphological changes of small lowland river on discharge rate. The aim of the study was the comparison of the changes of cross-sections and longitudinal profile of the Mała river at the distance of 600 m. The paper presents the geometry changes of the river from field measurements made in 2013 in comparison with design assumptions from 1967 which were implemented in 1971. The four (available historical) cross-sections (hm 7+700, 7+800, 7+900, 8+000) and longitudinal profile (hm 7+700÷8+300) of the river were analysed and compared. The large scale of subsidence of the land surface on both banks was observed (even to 0.5 m). Probably it is the effect of peat shrinkage and mineralization processes of organic soils. The bottom of the Mała river was still located at the same altitude in sand deposits in the analysed period 1971-2013. The designed slope of bottom of the Mała river equals 0.7‰ (1967) and present slope (2013) was estimated to be around 1‰. The subsidence of peat layers on both river banks, changes in cross-sections’ parameters (present irregular shapes in comparison with designed trapezoidal cross-sections) caused the reduction of cross-sectional area and water discharge of about 40-50% in comparison with parameters designed in 1967 and made in 1971.
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Curtean-Bănăduc, Angela. "Benthic Macroinvertebrate Communities in the Northern Tributaries of the “Iron Gates” Gorge (Danube River)." Transylvanian Review of Systematical and Ecological Research 16, no. 3 (2014): 151–64. http://dx.doi.org/10.1515/trser-2015-0039.
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Abstract The paper presents the structure of the benthonic macro-invertebrates communities in the Berzasca, Sirinia, Liubcova, and Mraconia rivers. The results are based on quantitative benthos samples (95 samples), collected in July 2014 from 19 sampling stations within the study area. In longitudinal profile, the benthonic macro-invertebrate communities of the Sirinia, Liubcova and Berzasca rivers displays relatively large structural variability, while the communities of the Mraconia River displays smaller structural variability. The structure of the benthonic macro-invertebrate communities correlated with the biotope characteristics indicates the good ecological status of the analysed rivers, with the exception of the Berzasca River sector downstream of the town of Berzasca and immediately upstream of the Danube junction, a sector with moderate ecological status due to negative effects from man-made modifications in the lotic biotope of the sector.
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Seidl, Michele A., Robert C. Finkel, Marc W. Caffee, G. Bryant Hudson, and William E. Dietrich. "Cosmetic Isotope Analyses Applied to River Longitudinal Profile Evolution: Problems and Interpretations." Earth Surface Processes and Landforms 22, no. 3 (1997): 195–209. http://dx.doi.org/10.1002/(sici)1096-9837(199703)22:3<195::aid-esp748>3.0.co;2-0.
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Ghosh, Sandipan, and Soumya Kundu. "Transient Fluvial Response and Topographic Disequilibrium in the Rivers of the Darjeeling Sikkim Himalaya, India: Geospatial Inference on Tectonic Geomorphology." Journal Of The Geological Society Of India 101, no. 4 (2025): 551–64. https://doi.org/10.17491/jgsi/2025/174125.
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ABSTRACT The assessment of regional tectonic deformation on the earth’s surface, tectonically active landscapes, and the geomorphic manifestation of active tectonics through the use of sophisticated geospatial tools, short-term geodetic data, and longer-term geologic data is made possible here by tectonic geomorphology. The central-southern region of the Darjeeling Sikkim Himalaya (DSH), which is known for its transient fluvial landforms and active tectonics, is primarily characterized by the Lesser Himalaya and Quaternary piedmont fans. The complex river systems of the Tista and Jaldhaka drain it, and few earth scientists predict that significant earthquakes will probably strike this area soon. The current analysis of tectonic geomorphology indicates that the upstream migration of knickpoints, the shifting river gradient, and the anomaly in the channel steepness index are all caused by the continuous tectonic disturbance of the DSH, which accelerates fluvial incision in an upstream direction to maintain equilibrium. The goal of the current geospatial research work is to determine whether it is possible to predict seismic hazard zones or tectonic stress zones in the DSH by using the geomorphic parameters of the transient fluvial response, which is the morphology of a river profile that changes to fit shifting boundary conditions, such as tectonic upliftment, and thus creates a transient river basin. Because bedrock river networks tend to progressively carve mountain slopes and maintain signs of prior landscape changes, a study of these networks is essential to understanding the topographic evolution of the DSH orogens. The stream power incision model, normalised steepness index (Ksn), stream-length gradient index (SL), hypsometric integral (Hi), chi plot (χ), and knickpoint finder are MATLAB-based Topo Toolbox 2 functions for tectonic geomorphology that are used in the study of active tectonics. According to the primary finding, rivers with high Ksn values (between 100 and 305 m0.9), SL index (522-12098 gradient m) and Hi (&gt;0.55) are associated with the major thrust effect zones. These zones are identified on river longitudinal profiles as probable locations of major tectonic stress. Rivers across the MFT (Main Frontal Thrust), MBT (Main Boundary Thrust), and MCT (Main Central Thrust) show notable departures from equilibrium (dominance of convexity over concavity) in river longitudinal profiles. This suggests that the uplift rate predominates over the fluvial incision rate, leading to the creation of gorges and linear valleys.
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BERKOVITCH, K. M., L. V. ZLOTINA, and L. A. TURYKIN. "THE FEATURES OF THE OKA RIVER LONGITUDINAL PROFILE DEVELOPMENT UNDER THE ANTHROPOGENIC DISTURBANCES OF THE RIVER BED." Geomorphology RAS, no. 3 (January 1, 2016): 3–11. http://dx.doi.org/10.15356/0435-4281-2016-3-3-11.
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Ahmad, Z. "Prediction of longitudinal dispersion coefficient using laboratory and field data: relationship comparisons." Hydrology Research 44, no. 2 (2012): 362–76. http://dx.doi.org/10.2166/nh.2012.047.
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Knowledge of dispersion of pollutants in streams is necessary for the determination of both the acceptable limits of effluent input and the concentration along the river course. In the far-field, the primary variation of concentration is in one direction and termed longitudinal dispersion; it is independent of the geometrical configuration and type of source. The longitudinal dispersion coefficient represents the dispersive characteristics of a stream and is required to compute the pollutant concentration at downstream locations of the streams. The longitudinal dispersion coefficient can be estimated either from the pollutant concentration profile, stream velocity profile or channel and flow parameters. Many laboratory and field studies have been carried out by several investigators to develop relationships for the longitudinal dispersion coefficient in terms of the known hydraulic characteristics of the stream. This paper evaluates the accuracy of the existing empirical relationships for the prediction of longitudinal dispersion coefficient, using a large volume of data that cover a wide range of flow and channel parameters.
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Iqbal, Muhammad Mazhar, Muhammad Shoaib, Hafiz Umar Farid, and Jung Lyul Lee. "Assessment of Water Quality Profile Using Numerical Modeling Approach in Major Climate Classes of Asia." International Journal of Environmental Research and Public Health 15, no. 10 (2018): 2258. http://dx.doi.org/10.3390/ijerph15102258.
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A river water quality spatial profile has a diverse pattern of variation over different climatic regions. To comprehend this phenomenon, our study evaluated the spatial scale variation of the Water Quality Index (WQI). The study was carried out over four main climatic classes in Asia based on the Koppen-Geiger climate classification system: tropical, temperate, cold, and arid. The one-dimensional surface water quality model, QUAL2Kw was selected and compared for water quality simulations. Calibration and validation were separately performed for the model predictions over different climate classes. The accuracy of the water quality model was assessed using different statistical analyses. The spatial profile of WQI was calculated using model predictions based on dissolved oxygen (DO), biological oxygen demand (BOD), nitrate (NO3), and pH. The results showed that there is a smaller longitudinal variation of WQI in the cold climatic regions than other regions, which does not change the status of WQI. Streams from arid, temperate, and tropical climatic regions show a decreasing trend of DO with respect to the longitudinal profiles of main river flows. Since this study found that each climate zone has the different impact on DO dynamics such as reaeration rate, reoxygenation, and oxygen solubility. The outcomes obtained in this study are expected to provide the impetus for developing a strategy for the viable improvement of the water environment.
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Ruetenik, Gregory A. "Introducing RiverProfileApp, a web application for near-global, exploratory, longitudinal river profile analysis." International Journal of Digital Earth 15, no. 1 (2022): 679–89. http://dx.doi.org/10.1080/17538947.2022.2055173.
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HAN, Zhiyong, Xusheng LI, Nairui WANG, Gang CHEN, Xianyan WANG, and Huayu LU. "Application of River Longitudinal Profile Morphometrics to Reveal the Uplift of Lushan Mountain." Acta Geologica Sinica - English Edition 91, no. 5 (2017): 1644–52. http://dx.doi.org/10.1111/1755-6724.13403.
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Zamyshlyaev, V. I. "Relationships between river dune parameters when approximating their longitudinal profile by a triangle." Vestnik Gosudarstvennogo universiteta morskogo i rechnogo flota imeni admirala S. O. Makarova 16, no. 2 (2024): 236–50. http://dx.doi.org/10.21821/2309-5180-2024-16-2-236-250.
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Jurajda, P., Z. Adámek, M. Janáč, and Z. Valová. "Longitudinal patterns in fish and macrozoobenthos assemblages reflect degradation of water quality and physical habitat in the Bílina river basin." Czech Journal of Animal Science 55, No. 3 (2010): 123–36. http://dx.doi.org/10.17221/14/2009-cjas.
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The aim of this study was to provide the first account of fish and macroinvertebrate communities in a heavily degraded river basin in the Czech Republic. Fish and macrozoobenthos were surveyed at 18 sites in the Bílina River and 11 sites in tributary streams during June–July 2007. Fish were sampled by electrofishing and macrozoobenthos were collected by kick-sampling using a sweep net. The composition of macroinvertebrate assemblages in headwater and reference sites in the upper Bílina River indicated clean water with saprobic index (SI) 1.31–1.43 followed by a transitional stretch downstream the Kyjická reservoir (SI 2.05–2.32) and dramatic decline of water quality to SI 3.18 in the river stretch downstream of industrial and municipal pollution at Litvínov-Záluží. Despite several minor pollution sources on the subsequent downstream river stretch until its mouth into the Elbe River, the water quality indicators fluctuated in the range of lower betamesosaprobity (SI 2.06–2.58). Species richness and biodiversity indices followed a similar pattern as river saprobity. Twenty-three fish species were documented in the Bílina River basin. Chub (<I>Leuciscus cephalus</I>), gudgeon (<I>Gobio gobio</I>) and roach (<I>Rutilus rutilus</I>) were the most frequent species at the Bílina sites. Chub was the most numerous fish in the tributaries. Fish species richness in the longitudinal profile did not increase downstream in the Bílina mainstem, most likely because the presence of reservoirs and water pollution interrupted the river continuum pattern. Qualitative data on fish assemblages corresponded to the course of environmental stress. A sustainable fish community was documented only in the lowermost site in Ústí nad&nbsp;Labem near the confluence with the Elbe River. The Bílina River tributaries constitute potential refuges for fish in this basin.
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Droujko, Jessica, Srividya Hariharan Sudha, Gabriel Singer, and Peter Molnar. "Sediment source and sink identification using Sentinel-2 and a small network of turbidimeters on the Vjosa River." Earth Surface Dynamics 11, no. 5 (2023): 881–97. http://dx.doi.org/10.5194/esurf-11-881-2023.
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Abstract. Measurement of suspended sediment concentration (SSC) at a basin outlet yields a basin-integrated picture of sediment fluxes; however, it does not give a full spatial perspective on possible sediment pathways within the catchment. Spatially resolved estimates of SSC along river networks are needed to identify sediment sources and sinks, to track erosion gradients, and quantify anthropogenic effects on catchment-scale sediment production, e.g., by dam construction or erosion control. Here we explore the use of high-resolution Sentinel-2 satellite images for this purpose in narrow and morphologically complex mountain rivers, combined with ground station turbidity sensing for calibration and supported by a Lagrangian kayak-derived river profile measurement. The study is carried out on the Vjosa River in Albania, which is one of the last intact large river systems in Europe. We developed a workflow to estimate river turbidity profiles from Sentinel-2 images including atmospheric, cloud cover, and deepwater corrections for the period May 2019 to July 2021 (106 images). In situ turbidity measurements from four turbidity sensors located along the Vjosa River provided ground truthing. A multivariate linear regression model between turbidity and reflectance was fitted to this data. The extracted longitudinal river turbidity profiles were qualitatively validated with two descents of the river with a turbidity sensor attached to a kayak. The satellite-derived river profiles revealed variability in turbidity along the main stem with a strong seasonal signal, with the highest mean turbidity in winter along the entire length of the river. Most importantly, sediment sources and sinks could be identified and quantified from the river turbidity profiles, both for tributaries and within the reaches of the Vjosa. The river basin and network acted as a sediment source most of the time and significant sediment sinks were rare. Sediment sources were mostly tributaries following basin-wide rainfall, but within-reach sources in river beds and banks were also possible. Finally, we used the data to estimate the mean annual fine sediment yield at Dorez at ∼2.5±0.6 Mt yr−1, in line with previous studies, which reveals the importance of the Vjosa River as an important sediment source of the Adriatic Sea. This work presents a proof of concept that open-access high-resolution satellite data have potential for suspended sediment quantification not only in large waterbodies but also in smaller rivers. The potential applications are many, including identifying erosion hotspots, sediment activation processes, local point sources, glacial sediment inputs, and sediment fluxes in river deltas, with a necessary future research focus on improving accuracy and reducing uncertainty in such analyses.
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Sinha, Malavika. "Discussion on Hundru fall as a knick point, Iharkhand, India." Landscape & Environment 15, no. 2 (2021): 44–52. http://dx.doi.org/10.21120/le/15/2/4.
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Subarnarekha River lies in the vicinity to the Ranchi mega lineament zone of Jharkhand State. This river links the Tamar Porapahar shear zone and North Singhbhum shear zone. The Hundru falls is the sudden and abrupt drop of elevation (longitudinal profile) of upstream of river Subarnarekha. The basic aim of this paper is to assess the Hundru falls as a perfect citation of an upstream knick point in Indian context. This paper covers the knick point formation of upstream of the Subarnarekha river. This upper catchment is more diversified in the terms of metamorphic and igneous rocks. This zone has crossed a long path with diversified lithospheric adjustment with epirogenic upliftment.
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Bian, Meifang, Hengzhi Qiu, and Xiaoli Chen. "The Distribution Characteristics of Large Landslides Along the Daduhe River in the Eastern Tibetan Plateau and Their Effects on Landscape Evolution." Remote Sensing 17, no. 7 (2025): 1133. https://doi.org/10.3390/rs17071133.
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Landslides play a crucial role in landscape evolution, particularly in tectonically active areas. However, research on the relationship between landslide development and landscape evolution remains limited. This study examines the hypsometric integral (HI) values of the Daduhe river mainstem catchments to assess the landscape evolution stage and investigate its spatial correlation with the occurrence of landslides. Additionally, it evaluates the distribution of large landslides concerning elevation and slope. Furthermore, by analyzing the longitudinal profile of the Daduhe river, this study explores the relationship between the occurrence of landslides and knickpoints, as well as the impact of landslides on catchment morphology and material redistribution. The results show that the HI values of catchments along the Daduhe river range from 0.35 to 0.71, exhibiting a progression from youth to maturity and monadnock stages from upstream to downstream. Large landslides were predominantly distributed in areas with elevations of 1000–2000 m and slopes < 40°. Their distribution was closely linked to HI values: large landslides were sparse in catchments with HI > 0.5 (Banma county to Danba county) but more frequent in catchments with HI < 0.5 (Danba county to the river outlet). The longitudinal profile of the Daduhe river illustrates variations in channel morphology, with large landslides entering the river and facilitating the formation of knickpoints. The impact of large landslides on catchment landscape transformation, both in terms of morphology and material movement, exhibits a trend of gradual intensification from upstream to downstream. This study shows that landscape evolution can provide rich information to locate regions prone to landslides.
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Zevri, Asril. "Pemodelan Daerah Genangan Banjir Ekstrem Bendung Sungai Piam Kabupaten Langkat Provinsi Sumatera Utara." JURNAL SUMBER DAYA AIR 21, no. 1 (2025): 57–70. https://doi.org/10.32679/jsda.v21i1.915.
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The construction of the Piam River weir is one of the efforts to support food security for the community, especially in Langkat Regency. Increased water levels in the rainy season with high intensity and long duration can cause rapid changes in the return flow with large volumes in the upper reaches of the river. Changes in the return flow can cause flooding in the river plain, resulting in a risk of loss to the community. One of the initial nonstructural efforts in flood mitigation is to delineate flood inundation areas through hydraulic simulation modelling based on the 100-year return period maximum flood discharge, longitudinal and transverse river profiles, and weir profiles. Modelling simulations were carried out using HEC RAS Software in a 2-dimensional manner based on 100-year return period flood discharge data as boundary conditions upstream, DEMNAS as a base map of the river geometry profile, and weir dimensions as boundary conditions downstream. The results of modeling the flood inundation area with a 100-year return period flood discharge of 239.66 m3/det show that the maximum potential flood water level reaches 3 m inundating the plain area up to 500 m from the river bank. The flood inundation area that occurs reaches 390.21 ha so that flood control efforts are needed by building embankments and normalizing the river upstream of the weir.
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Li, Tao, Jun Hua Zhang, Guo Ming Gao, and Ting Wang. "Flow and Sedimentation Characteristics on Typical Tributary in Xiaolangdi Reservoir on Yellow River." Applied Mechanics and Materials 641-642 (September 2014): 175–78. http://dx.doi.org/10.4028/www.scientific.net/amm.641-642.175.
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Located at the exit of the last gorge of the middle reaches of the Yellow River, the Xiaolangdi Multipurpose Dam Project occupies a critical position in controlling both runoff and sediment of the River. typical tributary Zhenshui is the biggest tributary of Xiaolangdi Reservoir and its original storage capacity is 1.767 billion m3.This paper shows the process of the longitudinal profile of tributary Zhenshui,which faces the serious sediment bar growth at its mouth. Discussion is processed to show the possibility.
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., Dao Anh Vu, Hai Thanh Tran ., Thanh Xuan Ngo ., et al. "Evidence of active tectonic activity in Muong Te area illuminated by geomorphic analysis." Journal of Mining and Earth Sciences 64, no. 4 (2023): 69–78. http://dx.doi.org/10.46326/jmes.2023.64(4).08.
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Muong Te area is located in the northwest part of the Da River valley is seismically active with numerous recent earthquakes and associated geohazard as the consequences of tectonic collisions between the Indian plate and the Eurasian plate. The most dominant lineament system alogate in NW - SE trending which is about several kilometer to several ten kilometer. However, there has been little research regarding neotectonics deformation in this area. This study compiles remote sensing images observation data with new extracted geomorphic indices of the fluvial network to illustrate deformation patterns and potential active movements in the Muong Te. Previous study noticed that although river channels occupy a small part of the land surface, a longitudinal river profile is a more sensitive indicator of rock uplift rate than other morphological properties (Whipple et al. 2007; Dinh et al. 2019). Relationship between faults and geomorphology is quantified using 12.5 - m ALOS DEM to extract channel and basin metrics including drainage basin normalized steepness index (ksn) is greater than 200 (m0.9), and knickpoints of modeled river longitudinal profiles. The results of the normalized steepness index also show that several knickpoints arise locally from lithological boundaries of different erodibility; however, many high values of ksn the river were truncated by the NW - SE lineamets system which is suggesting that Da River fault system seem to be active. The results proposed that the strike - slip and normal motions alternated because of a permutation of σ1/σ2 under the same extensional stress regime of σ3 in the northeast - southwest direction. The existence of the active tectonics in the area might pose many geological hazards and it threat to regional habitants.
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BAYRAK, Galyna. "GEOLOGICAL AND GEOMORPHOLOGICAL FACTORS OF THE SMALL RIVERS MORPHODYNAMICS (ON THE EXAMPLE OF THE CHECHVA RIVER, LIMNITSA TRIBUTARIES)." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 1 (108) (2025): 5–14. https://doi.org/10.17721/1728-2713.108.01.
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Background. Small rivers are an important element in the structure of the earth's surface; they take an active part in the formation of its morphological outlines. They also perform an important function in the development of medium and large rivers, influence the implementation of a general nature-preserving strategy for the use of water resources in a certain region. The problem of studying the state and changes of small rivers, as well as the factors that cause changes, is multifaceted and requires thorough research. Small rivers are most dependent on geological and geomorphological factors, so it is important to study their influence on channel changes. Methods. Topographic maps of 1906, 1910, 1927, 1944, 1981, aerial photographs of 1952, 1967, 1978, and space photographs of 2005–2024 were used to study the morphodynamics of the Chechva River. Geocoding and channel digitization were performed in QGIS. A special interactive module was developed to analyze the distribution of erosion and accumulation processes along the longitudinal profile of the river in the MS Visual Studio software package. Cartographic and field studies were used to identify the characteristics of the influence of geological and geomorphological factors on the morphodynamics of the channel. Results. The morphodynamics of the Chechva River (a left tributary of the Limnytsia) was studied based on the analysis of materials from different periods. It was manifested by transverse and longitudinal displacements of the riverbed both in the mountainous part and in the foothills. Transverse shifts of the channel, changes in the tops of meanders, and changes in the number of branches took place in the mountainous part. The spectrum of changes was wider in the foothills: the migration of the channel with a change in its straight form to winding and meandering and from meandering to straight, reversal of the convexity by 180°, changes in the width and length of the meandering zone, the dynamics of morphological types and meanders parameters. The geological factors that caused the channel changes are: the lithological composition of the rocks, in particular, the presence of flysch deposits in the mountain and loose material in the foothill's parts of the Chechva valley, the granulometric composition of the rocks, their layered texture, significant fissures and a large number of outcrops on the banks. Geomorphological factors are essential: the morphometry of the basin with large height differences and dense and deep dismemberment, extensive forms of the transverse valley profile, changes in the slope and river fall, floodplain and channel parameters. Conclusions. Geological and geomorphological factors have both a motivating and a limiting influence on the morphodynamics of small river channels.
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YAMAMURA, Yuka, and Yasuo NIHEI. "LONGITUDINAL PROFILE OF BRIDGE DAMAGES IN MISASA RIVER DUE TO 2018 WESTERN JAPAN FLOODS." Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 75, no. 1 (2019): 308–16. http://dx.doi.org/10.2208/jscejhe.75.1_308.
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Mongolo, Jennifer, Nina Trusso, Rosi Dagit, Andres Aguilar, and Sabrina L. Drill. "A Longitudinal Temperature Profile of the Los Angeles River from June through October 2016." Bulletin, Southern California Academy of Sciences 116, no. 3 (2017): 174–92. http://dx.doi.org/10.3160/soca-116-03-174-192.1.
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Gallen, Sean F., and Karl W. Wegmann. "River profile response to normal fault growth and linkage: an example from the Hellenic forearc of south-central Crete, Greece." Earth Surface Dynamics 5, no. 1 (2017): 161–86. http://dx.doi.org/10.5194/esurf-5-161-2017.
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Abstract. Topography is a reflection of the tectonic and geodynamic processes that act to uplift the Earth's surface and the erosional processes that work to return it to base level. Numerous studies have shown that topography is a sensitive recorder of tectonic signals. A quasi-physical understanding of the relationship between river incision and rock uplift has made the analysis of fluvial topography a popular technique for deciphering relative, and some argue absolute, histories of rock uplift. Here we present results from a study of the fluvial topography from south-central Crete, demonstrating that river longitudinal profiles indeed record the relative history of uplift, but several other processes make it difficult to recover quantitative uplift histories. Prior research demonstrates that the south-central coastline of Crete is bound by a large ( ∼ 100 km long) E–W striking composite normal fault system. Marine terraces reveal that it is uplifting between 0.1 and 1.0 mm yr−1. These studies suggest that two normal fault systems, the offshore Ptolemy and onshore South-Central Crete faults, linked together in the recent geologic past (ca. 0.4–1 My BP). Fault mechanics predict that when adjacent faults link into a single fault the uplift rate in footwalls of the linkage zone will increase rapidly. We use this natural experiment to assess the response of river profiles to a temporal jump in uplift rate and to assess the applicability of the stream power incision model to this setting. Using river profile analysis we show that rivers in south-central Crete record the relative uplift history of fault growth and linkage as theory predicts that they should. Calibration of the commonly used stream power incision model shows that the slope exponent, n, is ∼ 0.5, contrary to most studies that find n ≥ 1. Analysis of fluvial knickpoints shows that migration distances are not proportional to upstream contributing drainage area, as predicted by the stream power incision model. Maps of the transformed stream distance variable, χ, indicate that drainage basin instability, drainage divide migration, and river capture events complicate river profile analysis in south-central Crete. Waterfalls are observed in southern Crete and appear to operate under less efficient and different incision mechanics than assumed by the stream power incision model. Drainage area exchange and waterfall formation are argued to obscure linkages between empirically derived metrics and quasi-physical descriptions of river incision, making it difficult to quantitatively interpret rock uplift histories from river profiles in this setting. Karst hydrology, break down of assumed drainage area discharge scaling, and chemical weathering might also contribute to the failure of the stream power incision model to adequately predict the behavior of the fluvial system in south-central Crete.
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Babiński, Zygmunt, Michał Habel, and Sergey Chalov. "Prediction of the Vistula Channel Development Between Wloclawek and Torun: Evaluation with Regard to the New Geological Survey." Quaestiones Geographicae 33, no. 3 (2014): 7–15. http://dx.doi.org/10.2478/quageo-2014-0025.
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Abstract The aim of this paper is to present the geological structure of the Vistula river valley floor as the modifying factor of fluvial processes and present the development conditions of the contemporary Vistula river channel, which underwent marked transformation due to bed erosion and lateral erosion below the Włocławek reservoir. The analysis of the geological data and the geological survey conducted at the study reach of the Vistula between Włocławek and Toruń resulted in an image of the geological structure of the channel bed along the longitudinal profile
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Lee, Chun-Sheng, and Louis L. Tsai. "A quantitative analysis for geomorphic indices of longitudinal river profile: a case study of the Choushui River, Central Taiwan." Environmental Earth Sciences 59, no. 7 (2009): 1549–58. http://dx.doi.org/10.1007/s12665-009-0140-3.
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Amanipoor, Hakimeh. "ACTIVE DEFORMATION DELINEATED BY GEOMORPHIC AND SEDIMENTARY RESPONSE OF RIVERS, CENTRAL ZAGROS FOLD – THRUST BELT, SW IRAN." Geodesy and Cartography 41, no. 3 (2015): 137–44. http://dx.doi.org/10.3846/20296991.2015.1086143.
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The mountain generation in Iran is because of continental collision between the Arabian and Eur-asia plate. Southwestern Iran shows active shorten that its evidences is deformation of crust and frequent earthquakes. At depth, active basement of the Zagros fold-thrust-belt in southwestern Iran, which are covered by folding of the Phanerozoic sediments, affected by some blind thrusted faults that have seismic nature. The Zagros fold-thrust-belt can be divided into 4 lithotectonic units including Sanandaj-Sirjan Zone (SSZ), Imbricate Zone (IZ), Zagros Fold Belt (ZFB), and Molasse Cover Sequence (MCS); this dividing and classification is based on geomorphology landscape, drainage pattern, rate of tectonics and stratigraphic records. Each tectonic unit characterized by especial abnormal forces in river systems. Active tectonics has the most important role to control the river systems by changing of channels incline. Change in the drainage pattern, channels cut, longitudinal profile, anomalous changes of sinuosity, changing of the side form and forming of terrace, change of river direction, compact meanders, cutting of meanders and geomorphology features of the rivers are responds to the active tectonics of region that are studied using remote sensing, DEM and field observations. These parameters are used to understand the vertical movement in the study area. Existing structures, especially growing anticlines and blind thrusted faults in the Zagros fold-thrust-belt, which cut the river channels and sometimes put them in parallel, are used in the study of their effect on the longitudinal and transverse tilt of morphological changes.
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Melo, Rafael Roney Camara de, and José Roberto Gonçalves de Azevedo. "Dynamics of sedimentary Capibaribe River bed after deepening dredging." RBRH 21, no. 4 (2016): 871–81. http://dx.doi.org/10.1590/2318-0331.01161603.
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ABSTRACT The growth of urban centers in the country are increasingly dependent on the adoption of new mobility options, and before this need was developed and initiated a project to build a river corridor passenger in a part of the Capibaribe River in the city of Recife-PE. For the implementation of a navigation channel deepening are needed dredging to define a geometry of the bed of the river compatible with the needs of ships that will traverse the channel. The monitoring of dredging is done with the constant bathymetric surveys where the information volumes of dredged sediments are removed, aiming to also check the temporal behavior of deposition and erosion processes. In this context, the work aimed to evaluate the geometry of the Capibaribe river bed after the deepening dredging, using data from bathymetric surveys at different times for making longitudinal and transverse profiles, and create digital models of depth to extract information about the deposition/aggradation or erosion/removing sediments and their respective volumes. Early Profile Capibaribe river showed mild slope and heterogeneity in the bottom of the form, especially after kilometer five, with trends of deposition/aggradation downstream of the confluence region with tax arising from the weir Apipucos and upstream of the winding sections in local enlargement of the cross section, and the amount of the fork located at kilometer nine. The scenarios after the dredging to deepen indicate places with predominance of erosion and other sedimentation processes. They compared the longitudinal and transverse profiles of two areas located in western shipping channel, one with 350 meters and over 1000 meters, where it was found that the area 1 to erosion/sediment removal exceeded sedimentation/aggradation, indicating the occurrence of dredging the interval between the two surveys linked to the natural processes. In the study area 2 the sedimentation/aggradation exceeded the removal/erosion, with a volume equivalent to 1 cm thickness. The aggradation occur homogeneously in the navigation channel, while erosion was located on the banks, more intensely on the right bank of the river.
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Khamenkova, E. V., та V. A. Teslenko. "Трофическая структура сообществ макрозообентоса реки Ола (северное побережье Охотского моря, Магаданская область)". Bulletin of the North-East Science Center, № 4 (28 грудня 2024): 51–60. https://doi.org/10.34078/1814-0998-2024-4-51-60.
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The proposed paper completes the series of publications on the structural and functional organization of the Ola River macrozoobenthos communities in the spatio-temporal aspect. it is for the first time that, in the Far North-East watercourse, the macrozoobenthos community trophic structure and its seasonal and interannual variability were revealed, and possible causes for the latter were formulated. It was established that the hierarchy of trophic groups along the longitudinal profile of the Ola River generally corresponds to the provisions of the river continuum concept. The functional organization of Ola River macrozoobenthos communities is distinguished with the high proportion of collectors-gatherers. The conclusions on the allocation of of the epi-, the meta-, and the hyporithral zone communities, previously made on the basis of their species composition, are confirmed.
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Mohsen, Ahmed, Tímea Kiss, Sándor Baranya, Alexia Balla, and Ferenc Kovács. "Thermal Profile Dynamics of a Central European River Based on Landsat Images: Natural and Anthropogenic Influencing Factors." Remote Sensing 16, no. 17 (2024): 3196. http://dx.doi.org/10.3390/rs16173196.
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River temperature is a critical parameter influencing aquatic ecosystems and water quality. However, it can be changed by natural (e.g., flow and depth conditions) and human factors (e.g., waste and industrial water drainage). Satellite-based monitoring offers a valuable tool for assessing river temperature on a large scale, elucidating the impacts of various factors. This study aims to analyze the spatiotemporal dynamics of surface water temperature (SWT) in the medium-sized Tisza River in response to natural and anthropogenic influences, employing Landsat satellites and in situ water temperature data. The validity of the Landsat-based SWT estimates was assessed across different channel sections with varying sizes. The longitudinal thermal profile of the Tisza was analyzed by mosaicking, monthly, four Landsat 9 images, covering the entire 962 km length of the Tisza in 2023. The impact of climate change was evaluated by analyzing SWT trends at a specific site from 1984 to 2024, utilizing 483 Landsat 4–9 images. The findings indicated elevated accuracy for Landsat-based SWT estimation (R2 = 0.94; RMSE = 3.66 °C), particularly for channel sizes covering ≥ 3 pixels. Discharge, microclimatic conditions, and channel morphology significantly influence SWT, demonstrating a general increasing trend downstream with occasional decreases during the summer months. Dams were observed to lower the SWT downstream due to cooler bottom reservoir water discharge, with more pronounced differences during the summer months (1–3 °C). Tributaries predominantly (75%) elevated the SWT in the Tisza River, albeit with varying magnitudes across different months. Over the 40-year study period, an increasing trend in SWT was discerned, with an annual rise rate of 0.0684 °C. While the thermal band of Landsat satellites proved valuable for investigating the Tisza River’s thermal profile at a broad scale, finer spatial resolution bands are necessary for detecting small-scale phenomena such as thermal plumes and localized temperature variations in rivers.
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Saveleva, P. "LONGITUDINAL PROFILE OF THE TERRACES IN THE MIDDLE OF THE KATUN RIVER VALLEY (SOUTHEASTERN ALTAI)." Transbaikal State University Journal 25, no. 1 (2019): 10–19. http://dx.doi.org/10.21209/2227-9245-2019-25-1-10-19.
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Mazurkin, P. M., and Ya O. Georgieva. "WAVELET ANALYSIS OF EAST LONGITUDE AT CHARACTERISTIC POINTS OF THE LONGITUDINAL PROFILE SMALL RIVER IROVKA." Успехи современного естествознания (Advances in Current Natural Sciences), no. 2 2020 (2020): 66–72. http://dx.doi.org/10.17513/use.37333.
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Szalóky, Z., V. Bammer, Á. I. György, et al. "Offshore distribution of invasive gobies (Pisces: Gobiidae) along the longitudinal profile of the Danube River." Fundamental and Applied Limnology / Archiv für Hydrobiologie 187, no. 2 (2015): 127–33. http://dx.doi.org/10.1127/fal/2015/0768.
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Cai, H., H. H. G. Savenije, C. Jiang, L. Zhao, and Q. Yang. "Analytical approach for determining the mean water level profile in an estuary with substantial fresh water discharge." Hydrology and Earth System Sciences Discussions 12, no. 8 (2015): 8381–417. http://dx.doi.org/10.5194/hessd-12-8381-2015.
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Abstract. Although modestly, the mean water level in estuaries rises in landward direction induced by a combination of the salinity gradient, the tidal asymmetry, and the backwater effect. The water level slope is increased by the fresh water discharge. However, the interactions between tide and river flow and their individual contributions to the rise of the mean water level along the estuary are not yet completely understood. In this study, we adopt an analytical approach to describe the tidal wave propagation under the influence of fresh water discharge, in which the friction term is approximated by a Chebyshev polynomials approach. The analytical model is used to quantify the contributions made by tide, river, and tide–river interaction to the water level slope along the estuary. Subsequently, the method is applied to the Yangtze estuary under a wide range of river discharge conditions and the influence of tidal amplitude and fresh water discharge on the longitudinal variation of mean water level is explored. The proposed method is particularly useful for accurately predicting water levels and the frequency of extreme high water, relevant for water management and flood control.