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Artículos de revistas sobre el tema "River processes"

Autor: Grafiati

Publicado: 10 de marzo de 2023

Última modificación: 31 de julio de 2025

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1

Vandenberghe, Jef, and Ming-ko Woo. "Modern and ancient periglacial river types." Progress in Physical Geography: Earth and Environment 26, no. 4 (2002): 479–506. http://dx.doi.org/10.1191/0309133302pp349ra.

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Climate has been proposed conventionally as the primary factor that determines periglacial river activity (aggradation) and pattern (braided). This concept does not explain the rich diversity in river patterns and morphological processes in both the present and past periglacial environments: besides braided rivers and sandur, meandering, anabranching, transitional and deltaic rivers also occur. A first attempt is made to combine past and present periglacial river types with regard to their morphology, processes and environments. The processes that control river energy and morphology are discus

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2

Delina, Aija, Alise Babre, Konrads Popovs, Juris Sennikovs, and Baiba Grinberga. "Effects of karst processes on surface water and groundwater hydrology at Skaistkalne Vicinity, Latvia." Hydrology Research 43, no. 4 (2012): 445–59. http://dx.doi.org/10.2166/nh.2012.123.

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The Skaistkalne area in Latvia is one of the places where karst processes in gypsum strata occurs. The Iecava and Memele rivers border the area with extensive surface karst features such as sinkholes and karst lakes. Earlier investigations suggested a hydraulic connection between the Iecava and Memele rivers exists via the karst conduits due to the water level (WL) difference in the rivers. A set of methods was performed to study the possible connection: dye tracer was applied in the Iecava river and its occurrence was visually observed at the karst lakes and Memele river; the current velocity

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3

Ou, Haidong, Shirong Cai, Wei Fan, et al. "Sustaining the Pearl River: A Critical Review of Changes in Fluvial Geomorphological Processes and the Driving Forces in the Pearl River Basin." Water 16, no. 7 (2024): 1001. http://dx.doi.org/10.3390/w16071001.

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The Pearl River is one of China’s large rivers, the second-largest river and the fourth-longest river in China. Its unique geography, landform, and climate conditions create unique fluvial geomorphological processes. Affected by human activities and climate change, the fluvial geomorphological processes in the Pearl River Basin have undergone significant changes in recent decades, seriously affecting the river’s sustainable development. This paper critically reviews changes in fluvial geomorphological processes and analyzes influencing factors in the Pearl River Basin with a focus on possibili

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4

Lefebvre, Mario, and Fatima Bensalma. "An Application of Filtered Renewal Processes in Hydrology." International Journal of Engineering Mathematics 2014 (May 5, 2014): 1–9. http://dx.doi.org/10.1155/2014/593243.

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Filtered renewal processes are used to forecast daily river flows. For these processes, contrary to filtered Poisson processes, the time between consecutive events is not necessarily exponentially distributed, which is more realistic. The model is applied to obtain one- and two-day-ahead forecasts of the flows of the Delaware and Hudson Rivers, both located in the United States. Better results are obtained than with filtered Poisson processes, which are often used to model river flows.

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5

Yakhno, Oleg, Ihor Hnativ, and Roman Hnativ. "Influence of cavitation processes on river water purification of mountain streams." Mechanics and Advanced Technologies 6, no. 1 (2022): 62–69. http://dx.doi.org/10.20535/2521-1943.2022.6.1.254613.

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Problems: The article considers the study of the influence of cavitation phenomena in hydrodynamically active areas of mountain rivers on the processes of natural self-purification of water. The paper considers the experimental results of determining the change in seasonal indicators of the hydrochemical composition of surface waters in the Stryi river basin. Objective: to determine the impact of hydrodynamically active areas (HAA) of mountain rivers on the processes of natural self-purification and to develop methods of laboratory modeling of these areas to determine the hydrochemical p

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6

Timuhins, Andrejs, Valērijs Rodinovs, and Māris Kļaviņš. "Wavelet analysis of the Baltic region river runoff longh-term trends and fluctuations." Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences. 64, no. 5-6 (2010): 229–35. http://dx.doi.org/10.2478/v10046-011-0009-1.

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Wavelet analysis of the Baltic region river runoff longh-term trends and fluctuations The study of changes in river discharge and flood regime can provide important information on climate change and its impacts. Wavelet analysis offers new possibilities to study changes of river discharge patterns in regard to periodical processes on a background of climate change. In this study wavelet analysis was used to study long-term changes of river discharge in the Baltic region. Periodic oscillations of discharge intensity, and low- and high-water flow years are common for the major rivers in the East

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7

Ghimire, Motilal, and Puspa Sharma. "Geomorphic assessment of morphology of Siwalik origin rivers in Far-west Nepal." Journal of Nepal Hydrogeological Association 1 (September 1, 2024): 16–42. https://doi.org/10.3126/jnha.v1i1.78220.

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Geology, tectonics, topography, climate, land use, and human activity impact river morphology significantly, affecting downstream morphology and hydrology. In Nepal, rivers traversing complex geology and active tectonics are subjected to intense weathering and erosion, resulting in a high sediment yield and substantial impacts on river morphology. Despite the importance of understanding river morphology, studies on Himalayan rivers remain limited. This study investigates the characteristics of basin and river morphonology of the Siwalik origin river in far-west Nepal using GIS, remote sensing,

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8

Tsaryk, Petro, Lyubomyr Tsaryk, and Ihor Vitenko. "CARTOGRAPHIC SUPPORT OF TRANSFORMATIONAL GEOECOLOGICAL PROCESSES IN THE DZHURYN RIVER BASIN." SCIENTIFIC ISSUES OF TERNOPIL VOLODYMYR HNATIUK NATIONAL PEDAGOGICAL UNIVERSITY. SERIES: GEOGRAPHY 59, no. 2 (2025): 89–98. https://doi.org/10.25128/2519-4577.25.2.10.

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The growth of anthropogenic impact on the natural environment of basin systems in the context of global climate change causes significant changes in the state of the constituent geosystems, reduces the quality of water, biotic and land resources, creates a danger to the existence of ecosystems and humanity. In this context, there is a need to create new tools for nature management and nature conservation. This function can be performed by cartographic research of the river basin system. The scientific foundations of the development of a comprehensive cartographic research of the river basin sy

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9

Wohl, Ellen. "Geomorphic context in rivers." Progress in Physical Geography: Earth and Environment 42, no. 6 (2018): 841–57. http://dx.doi.org/10.1177/0309133318776488.

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Geomorphic context refers to the geomorphic setting of a river reach, which is defined as a length of river with consistent valley and channel geometry. Context includes spatial dimensions of geometry, location within a drainage basin, and location within a global context. Context also includes temporal dimensions of the frequency and duration of specific processes influencing the river reach and the historical sequence of natural and human-induced processes that continue to influence process and form in the river reach. These spatial and temporal characteristics interact to create a geomorphi

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10

Li, Pushuang, Dan Li, Xiaoqing Sun, Zhaosheng Chu, Ting Xia, and Binghui Zheng. "Application of Ecological Restoration Technologies for the Improvement of Biodiversity and Ecosystem in the River." Water 14, no. 9 (2022): 1402. http://dx.doi.org/10.3390/w14091402.

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With global warming, urbanization, and the intensification of human activities, great pressures on river ecosystems have caused ecosystem degradation, the decline in habitats and biodiversity, and the loss of function. Ecological restoration technologies (ERTs) in rivers are effective measures for improving habitat and biodiversity, which has the advantage of recovering ecosystems and biodiversity and promoting the formation of healthy rivers. Several applications of ERTs, including ecological water transfer, fish passage construction, dam removal/retrofit, channel reconfiguration, river geomo

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11

Chalov, R. S., and S. R. Chalov. "Channel Processes Disconnectivity in Rivers Hydromorphology." Izvestiya Rossiiskoi Akademii Nauk Seriya Geograficheskaya 87, no. 2 (2023): 234–49. http://dx.doi.org/10.31857/s2587556623020036.

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The present paper deals with five main structural levels of channel processes and channel patterns due to disconnectivity of fluvial processes. River braiding is related to existence of point, bar, channel (island), anabranching and large distributary channels (located in the deltas of large and largest rivers). Meandering is related to sinuosity of the flow and formation of complex loop and large meanders, the dimensions of which are larger than those corresponding to the water content of the river, and the meanders of the meandering belts. Due to the instability of the straight flow, the str

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12

Vishal, S. Gholap. "IMPACT OF SAND DREDGING AND SILT EXTRACTION ACTIVITY ON RIVER AND ITS CHARACTERISTICS : A REVIEW." International Journal of Engineering Sciences & Research Technology 5, no. 3 (2016): 1–4. https://doi.org/10.5281/zenodo.46974.

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The present research work highlights the influences of sand dredging and  extensive silt quarrying activity on rivers. The sand dredging activity and its impact on the river processes and other river environment have discussed in the present review paper. It has seen that most of the rivers and their processes are highly degraded and altered due to these activities. In India and almost in the regions of Maharashtra, the ground water is decreasing and such activities also invited the problems of ground water depletion. The study also deals with the relationship between these activities and

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13

Zhou, Siping, J. A. McCorquodale, and J. Biberhofer. "Modelling of pollutant mixing in the St. Lawrence River." Canadian Journal of Civil Engineering 22, no. 5 (1995): 1041–45. http://dx.doi.org/10.1139/l95-118.

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Many of Canada's large rivers, such as the connecting channels of the Great Lakes, receive contaminant loads from industrial, municipal, and tributary sources. These contaminants experience two general types of mixing, outlet-dominated mixing processes (near field) and river-dominated mixing processes (far field). This note is concerned with the numerical modelling of the far field processes by a fully elliptic form of the two-dimensional depth-averaged river model proposed by Rodi et al. Many of the popular hydrodynamics codes experience numerical diffusion which far exceeds the real turbulen

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14

Osterkamp, W. R. "Fluvial Processes in River Engineering." Eos, Transactions American Geophysical Union 70, no. 4 (1989): 51. http://dx.doi.org/10.1029/89eo00033.

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15

Nafziger, Jennifer, Yuntong She, and Faye Hicks. "Dynamic river ice processes in a river delta network." Cold Regions Science and Technology 158 (February 2019): 275–87. http://dx.doi.org/10.1016/j.coldregions.2018.09.005.

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16

Mussina, Ainur, Marzhan Tursyngali, Kassym Duskayev, Javier Rodrigo-Ilarri, María-Elena Rodrigo-Clavero, and Assel Abdullayeva. "Forecasting Channel Morphodynamics in the Ulken Almaty River (Ile Alatau, Kazakhstan)." Water 17, no. 13 (2025): 2029. https://doi.org/10.3390/w17132029.

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This article focuses on forecasting morphological changes in small rivers, using the Ulken Almaty River, located on the northern slope of the Ile Alatau range in the Tien Shan mountain system, as a case study. One of the key components of river morphology is the dynamics of channel processes, including erosion, accretion, and the shifting of channel forms. Understanding these processes in rivers flowing through urbanized areas is essential for mitigating environmental and infrastructural risks. Despite their importance, studies of this nature in Kazakhstan remain at a formative stage and are l

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17

Prowse, Terry D., and Joseph M. Culp. "Ice breakup: a neglected factor in river ecology." Canadian Journal of Civil Engineering 30, no. 1 (2003): 128–44. http://dx.doi.org/10.1139/l02-040.

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To minimize environmental impacts that may result from any engineered modifications of stream or river systems, a basic understanding of river ecology is required. Most fundamental theories of river ecology have developed largely from studies of warm-temperate and tropical streams and rivers. As these theories evolved over the last few decades, floods were recognized increasingly as dominant hydrologic events that control numerous abiotic and biotic forms and processes, both within the channel and on the adjacent riparian floodplains. Over approximately the same time frame, river-ice breakup w

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18

Kędzior, Renata, Małgorzata Kłonowska-Olejnik, Elżbieta Dumnicka, et al. "Macroinvertebrate habitat requirements in rivers: overestimation of environmental flow calculations in incised rivers." Hydrology and Earth System Sciences 26, no. 15 (2022): 4109–24. http://dx.doi.org/10.5194/hess-26-4109-2022.

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Abstract. Flow variability determines the conditions of river ecosystems and river ecological functioning. The variability of ecological processes in river ecosystems gradually decreases due to river channelization and incision. Prediction of the environmental flow allows us to keep biological diversity and river health developed as a response to the degradation of aquatic ecosystems overexploited by humans. The goal of the study was to test the influence of river incision on environmental flow estimation based on the Biological Monitoring Working Party (BMWP) macroinvertebrate index. A total

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19

Chen, Xin, Jing Li, Guoce Xu, et al. "Mechanisms Driving Seasonal Succession and Community Assembly in Sediment Microbial Communities Across the Dali River Basin, the Loess Plateau, China." Microorganisms 13, no. 2 (2025): 319. https://doi.org/10.3390/microorganisms13020319.

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Microorganisms are instrumental in river ecosystems and participate in biogeochemical cycles. It is thought that dynamic hydrological processes in rivers influence microbial community assembly, but the seasonal succession and community assembly of river sediments on the Loess Plateau remain unclear. This study used high-throughput sequencing technology (16S and ITS) and the neutral community model to analyze seasonal succession and the assembly processes associated with microbial communities in the Dali River, a tributary of the Yellow River on the Loess Plateau. The results showed that sedime

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20

Kusuda, Tetsuya, Tohru Futawatari, and Kyoko Oishi. "SIMULATION OF NITRIFICATION AND DENITRIFICATION PROCESSES IN A TIDAL RIVER." Water Science and Technology 30, no. 2 (1994): 43–52. http://dx.doi.org/10.2166/wst.1994.0027.

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Nitrification and denitrification processes in a well mixed tidal river in Japan are modeled, based on results of long term field observation on water quality and sediments in the river. Laboratory test results and values in references are used for the determination of parameters and coefficients in the model. In modeling of the processes, sediments, suspended solids, and overlying water are taken as elements and in computation a Lagrangian reference frame in terms of accumulated water volume is employed for reduction in numerical dispersion. Simulation results on ammonium and nitrate nitrogen

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21

A., Mammadova,, and Aliyev, S. "Study of the Salt Composition of Some Rivers of the Lerik District." Bulletin of Science and Practice, no. 1 (January 15, 2023): 121–24. http://dx.doi.org/10.33619/2414-2948/86/15.

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The article is devoted to the study of the ionic and salt composition of the rivers of the Lerik District of the southern part of Azerbaijan. The results of analyzes of the river waters selected as the object of the study show that there were no serious processes of mineralization in the rivers. The salinity of the river waters of the Lerik District (the Bilnа River, river waters taken from the villages of Mastail, Lankaranchay, Konjavuchay) varied within the range of 0,440-0.674 g/l. The composition of ions in these water sources varied depending on the rivers.

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22

Čanjevac, Ivan, Katarina Pavlek, and Danijel Orešić. "River lengths in Croatia determined from a topographic map at a scale of 1:25,000." Hrvatski geografski glasnik/Croatian Geographical Bulletin 84, no. 1 (2022): 5–30. http://dx.doi.org/10.21861/hgg.2022.84.01.01.

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This study presents methodologically consistent length measurements of rivers with a total length of 40 kilometres or more in the Republic of Croatia. These measurements were performed by vectorising river channels from a topographic map at a scale of 1:25,000. Contemporary orthophoto maps were used as additional cartographic sources for verification. The approaches used to determine the starting and ending points of rivers, i.e. sources and mouths or confluences, have been explained and their spatial coordinates were listed. The results showed that in terms of total river length, the 21 river

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23

Gurbanov, G. H. "CHARACTERISTICS OF EXODYNAMIC PROCESSES IN THE NAKHCHIVAN RIVER BASIN." Geography and water resources, no. 4 (December 24, 2024): 104–14. https://doi.org/10.55764/2957-9856/2024-4-104-114.44.

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In the article, we attempt to characterize adverse natural phenomena in terms of intensity in various river valleys of the Nakhchivan river basin. In the Nakhchivan river basin, flood events attract significant attention due to the damage they cause to populated areas and the economic system, as well as the repetition of widespread hazardous natural processes. The villages of Bichenak, Kolani, Daylagli, Selasuz and the city of Shahbuz are most exposed to the risks and dangers caused by flood flows. Stabilized landslides of ancient and relatively recent origin have developed in almost all river

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24

Melezh, T. A. "Transformation of Riverbed Processes in Case of their Interaction with Cities and Vice Versa (on the Example of Valleys of the Sozh and Iput Rivers, Republic of Belarus)." Вестник Пермского университета. Геология 22, no. 3 (2023): 215–26. http://dx.doi.org/10.17072/psu.geol.22.3.215.

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The paper describes the relationship and interaction of the city with riverbeds and vice versa. It is determined that low-order rivers react more quickly to the impact of man-made factors, radically changing the type of riverbed processes (the Iput River). High-order rivers react primarily by changing morphometric characteristics (Sozh River).

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25

Khan, Usman, Hammad Tariq Janjuhah, George Kontakiotis, Adnanul Rehman, and Stergios D. Zarkogiannis. "Natural Processes and Anthropogenic Activity in the Indus River Sedimentary Environment in Pakistan: A Critical Review." Journal of Marine Science and Engineering 9, no. 10 (2021): 1109. http://dx.doi.org/10.3390/jmse9101109.

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The Indus River is Asia’s longest river, having its origin in the Tibet Mountain northwest of Pakistan. Routed from northern Gilgit and flowing to the plains, the river passes through several provinces and is connected by numerous small and large tributaries. The river was formed tectonically due to the collusion of the Indian and Eurasian plates, which is referred to as the Indus suture Plains zone (ISPZ). The geological setting of the study area is mainly composed of igneous and metamorphic rocks. The river passed through a variety of climatic zones and areas, although the predominant climat

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26

Gusarov, A. V., and L. F. Maksyutova. "The main regularities of the ratio between riverbed and basin components of erosion and suspended sediment yield in river basins of the USA." Geomorphology RAS, no. 1 (April 4, 2019): 3–24. http://dx.doi.org/10.31857/s0435-4281201913-24.

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Suspended sediment yield is one of the objective and sufficiently accurate measures of erosion intensity in river basins. In first approximation, it can be divided into the riverbed component –r(rb), the products of vertical and horizontal riverbed deformations), and basin component – r(bas), the products of soil and gully erosion. An attempt was made to distinguish this erosion structure in the USA river basins based on the partition of suspended sediments of 224 rivers (based on the data from the US Geological Service on the average monthly water discharges and suspended sediment yields) acc

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27

Burshtynska, Khrystyna, Ihor Bubniak, Iryna Zayats, Sofiia Blazhko, and Nazar Hrytskiv. "The influence of geological structures on the character of the channels of right-bank tributaries of the Dniester river." Geodynamics 1(36)2024, no. 1(36) (2024): 12–26. http://dx.doi.org/10.23939/jgd2024.01.012.

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The proposed study aims to determine the influence of geological structures on the features of the channels of the largest right-bank tributaries of the Dniester River - the Stryi, Bystrytsia, and Limnytsia rivers. For this purpose, we conducted zoning of the river based on morphometric and hydrological characteristics. Three parts were identified: mountainous, pre-mountainous area and plain area, which differ significantly in channel properties, their changes over time, and deformation processes. Objective. Based on remote sensing images of various resolutions, the use of historical maps over

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28

Kosteniyk, Liudmyla, and Natalia Zablotovska. "FEATURES OF LEVEL PROCESSES ON MOUNTAIN RIVERS WITHIN THE BOUNDARIES OF THE VORKHTO-PUTYL LOW MOUNTAINS (CHEREMOSH BASIN)." SCIENTIFIC ISSUES OF TERNOPIL VOLODYMYR HNATIUK NATIONAL PEDAGOGICAL UNIVERSITY. SERIES: GEOGRAPHY 52, no. 1 (2022): 51–59. http://dx.doi.org/10.25128/2519-4577.22.1.7.

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This publication is devoted to the study of the features of channel processes on mountain rivers that cross the Central synclinorium of the Ukrainian Carpathians, namely the region of the Vorokhto-Putilsky low mountains. These are mainly the rivers of the Cheremosh river basin, the hydrographic sources of the Black and White Cheremosh, as well as their small tributaries Iltsa and Richka. It is within the boundaries of this geological and geomorphological region that atypical hollow expansions of the bottoms of river valleys are observed (Zhabeevskaya, Krivopilskaya, Iltsevskaya, Krivoriv

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29

van Griensven, A., and W. Bauwens. "Concepts for river water quality processes for an integrated river basin modelling." Water Science and Technology 48, no. 3 (2003): 1–8. http://dx.doi.org/10.2166/wst.2003.0145.

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Although there are various ways to model the bio-chemical processes in rivers, two main trends can be distinguished: the traditional QUAL2E-type models and the RWQM-type models, developed by extending and adapting the ASM equations. Both approaches have their weak and strong points. This paper focuses on the application of these concepts in an integrated modelling context. To this purpose, the models were adapted to respect the mass balances, to enable linkage to WWTP outputs and to diffuse pollution sources. Both approaches have been included in ESWAT - Extended Soil and Water Assessment Tool

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30

Palmer, Margaret, and Albert Ruhi. "Linkages between flow regime, biota, and ecosystem processes: Implications for river restoration." Science 365, no. 6459 (2019): eaaw2087. http://dx.doi.org/10.1126/science.aaw2087.

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River ecosystems are highly biodiverse, influence global biogeochemical cycles, and provide valued services. However, humans are increasingly degrading fluvial ecosystems by altering their streamflows. Effective river restoration requires advancing our mechanistic understanding of how flow regimes affect biota and ecosystem processes. Here, we review emerging advances in hydroecology relevant to this goal. Spatiotemporal variation in flow exerts direct and indirect control on the composition, structure, and dynamics of communities at local to regional scales. Streamflows also influence ecosyst

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31

DATE, Masanao, Norihiro IZUMI, and Hitoshi TANAKA. "DELTAIC PROCESSES AT THE RIVER MOUTH OF THE ABASHIRI RIVER." PROCEEDINGS OF HYDRAULIC ENGINEERING 42 (1998): 1129–34. http://dx.doi.org/10.2208/prohe.42.1129.

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32

Evans, E. C., G. R. McGregor, and G. E. Petts. "River energy budgets with special reference to river bed processes." Hydrological Processes 12, no. 4 (1998): 575–95. http://dx.doi.org/10.1002/(sici)1099-1085(19980330)12:4<575::aid-hyp595>3.0.co;2-y.

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33

Pavlek, Katarina. "Geomorphological change in rivers: research approaches, results and challenges." Hrvatski geografski glasnik/Croatian Geographical Bulletin 85, no. 1 (2023): 5–39. http://dx.doi.org/10.21861/hgg.2023.85.01.01.

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Although rivers are inherently dynamic systems that are susceptible to change, human impact on rivers in the last century is considered to have been so significant that it has caused an unprecedented intensity of geomorphological change in river channels and floodplains. As these changes often lead to deterioration of ecological conditions as well as increased flood risks, the approach to river management has changed over the past twenty years. There is an increasing emphasis on a holistic approach based on the understanding of river system processes, for which studies of geomorphological chan

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34

Paz-Alberto, Annie Melinda, Melissa Joy M. Sison, Edmark Pablo Bulaong, and Marietta A. Pakaigue. "REMOTE SENSING APPLICATION OF THE GEOPHYSICAL CHANGES IN THE COASTLINES AND RIVERS OF ZAMBALES, PHILIPPINES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B8 (June 23, 2016): 379–86. http://dx.doi.org/10.5194/isprs-archives-xli-b8-379-2016.

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Geophysical changes in river outlet, river upstream and coastlines near the rivers of Bucao and Santo Tomas in Zambales, Philippines were analyzed using the Google Earth’s historical satellite imageries from 2004 to 2013. Data in 2015 were gathered from in situ field measurements ground validation. The study aimed to measure and determine changes in the width of river outlet, width of river bank upstream and shifting of coastline. <br><br> Results revealed that there was a decrease and increase in the width size of the Bucao and Santo Tomas river outlets, respectively during the st

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35

Paz-Alberto, Annie Melinda, Melissa Joy M. Sison, Edmark Pablo Bulaong, and Marietta A. Pakaigue. "REMOTE SENSING APPLICATION OF THE GEOPHYSICAL CHANGES IN THE COASTLINES AND RIVERS OF ZAMBALES, PHILIPPINES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B8 (June 23, 2016): 379–86. http://dx.doi.org/10.5194/isprsarchives-xli-b8-379-2016.

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Geophysical changes in river outlet, river upstream and coastlines near the rivers of Bucao and Santo Tomas in Zambales, Philippines were analyzed using the Google Earth’s historical satellite imageries from 2004 to 2013. Data in 2015 were gathered from in situ field measurements ground validation. The study aimed to measure and determine changes in the width of river outlet, width of river bank upstream and shifting of coastline. &lt;br&gt;&lt;br&gt; Results revealed that there was a decrease and increase in the width size of the Bucao and Santo Tomas river outlets, respective

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36

Roman, S. Chalov. "Issues of channel processes research for the waterways maintenance at unconfined river channels in Russia." Geography and Tourism 5, no. 2 (2016): 23–25. https://doi.org/10.5281/zenodo.223901.

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The article uses the example of the selected reaches of the main Russian rivers to discuss river transport capacity and difficulties in the maintenance of waterways in Russia that arise from the dynamics of fluvial processes. Attention is drawn to changeable river conditions resulting from both natural factors and the presence of hydrotechnical structures. An attempt is made to indicate “natural” river reaches and the ones transformed as a result of damming, which include the accumulation and erosion zones (above and below a dam). It is emphasized that the issues related to the use of waterway

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37

Kosteniuk, Liudmyla. "RESEARCH OF CHANNEL PROCESSES ON RICHKA RIVER (BLACK CHEREMOSH BASIN)." PROBLEMS OF GEOMORPHOLOGY AND PALEOGEOGRAPHY OF THE UKRANIAN CARPATHIANS AND ADJACENT AREAS 02, no. 13 (2021): 78–94. http://dx.doi.org/10.30970/gpc.2021.2.3550.

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In the article is devoted to the problem of studying channel processes on small mountain rivers of the Ukrainian Carpathians, where there are no regular observations. It is the lack of a monitoring system on such water bodies that is the main reason for the insufficient level of their study and presentation in literary sources on riverbed science. As is known, channel processes are a phenomenon based on the constant interaction of water flows (rivers) and the land surface. And the lack of real opportunities to assess the hydrological regime of the water body due to lack of information from obs

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38

Zhang, Junhong, Luojie Feng, Sujie Chen, et al. "Impoundment Impact of the Three Gorge Reservoir on the Hydrological Regime in the Lower Han River, China." Water 10, no. 11 (2018): 1670. http://dx.doi.org/10.3390/w10111670.

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Reservoir regulation has been playing an increasingly important role in water resources development and its influence on the hydrological processes of downstream tributaries has attracted much attention. The lower Han River is selected as a case study to examine the hydrological and hydraulic influence of the upstream flow regulation of the Three Gorges Reservoir (TGR) in the middle Yangtze River, China. Based on a hydrodynamic model and the observed data, the hydrological processes in the lower Han River were simulated and their changes were analyzed under the impoundment influences of the TG

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39

Xue, D., P. Boeckx та Z. Wang. "Nitrate sources and dynamics in a salinized river and estuary – a δ<sup>15</sup>N–NO<sub>3</sub><sup>−</sup> and δ<sup>18</sup>O–NO<sub>3</sub><sup>−</sup> isotope approach". Biogeosciences 11, № 20 (2014): 5957–67. http://dx.doi.org/10.5194/bg-11-5957-2014.

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Abstract. To trace NO3− sources and assess NO3− dynamics in salinized rivers and estuaries, three rivers (Haihe River: HH River, Chaobaixin River: CB River and Jiyun River: JY River) and two estuaries (HH Estuary and CJ Estuary) along the Bohai Bay (China) have been selected to determine dissolved inorganic nitrogen (DIN: NH4+, NO2− and NO3−. Upstream of the HH River, NO3− was removed 30.9 ± 22.1% by denitrification, resulting from effects of the floodgate: limiting water exchange with downstream and prolonging water residence time to remove NO3−. Downstream of the HH River NO3− was removed 2.

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40

Kim, Jonathan P., Keith A. Hunter, and Malcolm R. Reid. "Geochemical processes affecting the major ion composition of rivers in the South Island, New Zealand." Marine and Freshwater Research 50, no. 7 (1999): 699. http://dx.doi.org/10.1071/mf98128.

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The major ion (Na+ , K+ , Mg2+ , Ca2+ , Cl− , SO42− and reactive SiO2 ) compositions of seven rivers in the South Island, New Zealand (Manuherikia, Clutha, Takaka–Cobb, Haast, Grey, Aorere and Rakaia rivers) are reported. All the rivers were pristine in comparison with global average river waters, and the concentrations of most major ions were close to the 1% percentile levels for global river water compositions. A geochemical model that attributes ion compositions to both rain input and to the weathering of various simple mineral types in the catchment was applied to these data, and to data a

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41

Steelquist, Aaron T., Gustav B. Seixas, Mary L. Gillam, Sourav Saha, Seulgi Moon, and George E. Hilley. "The impact of bedrock meander cutoffs on 50 kyr scale incision rates, San Juan River, Utah." Earth Surface Dynamics 12, no. 5 (2024): 1071–89. http://dx.doi.org/10.5194/esurf-12-1071-2024.

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Abstract. Incision rates of major rivers may reflect the effects of drainage reorganization, hillslope processes, tectonic uplift, climate, the properties of rocks into which rivers incise, and other autogenic processes. On the Colorado Plateau, incision rates along the Colorado River have been interpreted as resulting from abrupt base-level changes produced by the integration of the Colorado River system. Specifically, the integration of the Colorado River in the location of Grand Canyon is thought to have created a knickpoint, enhanced by lithologic contrasts, which is propagating upstream.

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42

Shen, Hung Tao, De Sheng Wang, and A. M. Wasantha Lal. "Numerical Simulation of River Ice Processes." Journal of Cold Regions Engineering 9, no. 3 (1995): 107–18. http://dx.doi.org/10.1061/(asce)0887-381x(1995)9:3(107).

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43

Lal, A. M. Wasantha, and Hung Tao Shen. "Mathematical Model for River Ice Processes." Journal of Hydraulic Engineering 117, no. 7 (1991): 851–67. http://dx.doi.org/10.1061/(asce)0733-9429(1991)117:7(851).

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44

Shen, Hung Tao. "Mathematical modeling of river ice processes." Cold Regions Science and Technology 62, no. 1 (2010): 3–13. http://dx.doi.org/10.1016/j.coldregions.2010.02.007.

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45

Timco, Garry. "Mathematical modelling of river ice processes." Cold Regions Science and Technology 62, no. 1 (2010): 1–2. http://dx.doi.org/10.1016/j.coldregions.2010.02.009.

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46

Ma, Xieyao, Tetsuzo Yasunari, Tetsuo Ohata, and Yoshihiro Fukushima. "The influence of river ice on spring runoff in the Lena river, Siberia." Annals of Glaciology 40 (2005): 123–27. http://dx.doi.org/10.3189/172756405781813744.

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AbstractThe Lena river is one of the four largest rivers flowing into the Arctic Ocean. It has a complicated hydrological system that is affected not only by the amount of precipitation but also by the timing of ice break-up. To determine the mechanisms of runoff formation, a numerical analysis based on modeling was carried out for the period 1986–2000. The results show that (1) the timing of flood rise and peak can be modeled at Tabaga, which represents the upper and central portions of the Lena river; (2) river-freeze processes delay the spring, snowmelt-dominated flood by about 23 days; and

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47

Nikonorova, Inna, Vladimir Ilyin, and Anastasia Ilyina. "Anthropogenic transformation of the valleys of small rivers of the Chuvash Republic." E3S Web of Conferences 420 (2023): 04011. http://dx.doi.org/10.1051/e3sconf/202342004011.

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The object of the study is the valleys of small rivers of the Chuvash Republic. The type of economic use, the degree of anthropogenic contamination, modern slope processes are analyzed. The need for research is justified by the deterioration of the ecological state of the landscapes of river valleys, water quality in the watercourses of the Chuvash Republic. In order to collect factual material on the current state of the landscapes of river valleys, expeditions were conducted to the rivers Tsivil, Kubnya, Kirya. Lyulya. The choice of the selected key objects is explained by the fact that they

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48

Saleh, A., I. Abustan, Mohd Remy Rozainy M. A. Z., and N. Sabtu. "Sediment Transport and Characteristics in Perak River and Kurau River." International Journal of Engineering & Technology 7, no. 2.29 (2018): 849. http://dx.doi.org/10.14419/ijet.v7i2.29.14270.

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Particle size is the most important parameter to deal in sediment transport processes. This parameter is important to determine the class of sediment transport in river. It is also important for the selection of site for sand mining operation through the determination of the size of sediment, sediment capacity and sediment replenishment rate. Data were obtained through observations made from two rivers namely Sungai Perak and Sungai Kurau in Malaysia. The rivers were categorized as wide river for Sungai Perak and small river for Sungai Kurau. For Sungai Perak, the width of river ranges from 24

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49

Thomas, Sahinkuye, Silungwe Festo Richard, Tarimo K. P. R. Andrew, Kashaigili J. Japhet, and Mbungu Winfred. "Analysis of Water Exchange Processes between Groundwater and Surface Water in the Usangu Plains, Tanzania." Asian Journal of Environment & Ecology 23, no. 8 (2024): 52–73. http://dx.doi.org/10.9734/ajee/2024/v23i8584.

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The groundwater and surface water interface has been proved evident by the existence of effluent and influent streams. Still, the irrigation sector in sub-Saharan Africa, Tanzania included, is predominantly using surface water and groundwater conjunctively without a clear understanding of the contribution of each of the two water sources. This study was conducted to analyze the water exchange processes between groundwater and surface water in the Usangu Plains. Constrained by data scarcity in the study area, only three hydrograph separation techniques (Sliding interval, Fixed interval, and Loc

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50

Chapra, S. C., and P. G. Whitehead. "Modelling impacts of pollution in river systems: a new dispersion model and a case study of mine discharges in the Abrud, Aries and Mures River System in Transylvania, Romania." Hydrology Research 40, no. 2-3 (2009): 306–22. http://dx.doi.org/10.2166/nh.2009.075.

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A new model of dispersion has been developed to simulate the impact of pollutant discharges on river systems. The model accounts for the main dispersion processes operating in rivers as well as the dilution from incoming tributaries and first-order kinetic decay processes. The model is dynamic and simulates the hourly behaviour of river flow and pollutants along river systems. The model has been applied to the Aries and Mures River System in Romania and has been used to assess the impacts of potential dam releases from the Roşia Montană Mine in Transylvania, Romania. The question of mine water

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