Relevant bibliographies by topics / Fluvial and estuarine processes

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Academic literature on the topic 'Fluvial and estuarine processes'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Fluvial and estuarine processes"

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De Oliveira, Allan De Oliveira. "CARACTERIZAÇÃO SEDIMENTAR E APLICAÇÃO DO DIAGRAMA DE PEJRUP PARA INTERPRETAÇÃO DA DINÂMICA EM UMA ENSEADA ESTUARINA NA LAGOA DOS PATOS/BRASIL / Sedimentary Characterization and Application of Pejrup Diagram to Interpret the Dinamics in a Small Cove of The Lagoa dos Patos/Brazil." Geographia Meridionalis 1, no. 2 (December 18, 2015): 363. http://dx.doi.org/10.15210/gm.v1i2.6232.

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A partir da análise dos parâmetros estatísticos dos sedimentos de fundo de uma enseada estuarina e da aplicação do diagrama de Pejrup, foi possível caracterizar os processos dinâmicos e sedimentares que ocorrem em uma pequena enseada da Lagoa dos Patos. Os sedimentos que recobrem o fundo da área estudada são formados por areias finas a muito finas, com presença de material lamoso, preferencialmente silte, em direção à região central e margens da enseada. A hidrodinâmica da área é dominada pela circulação estuarina e correntes fluviais, bem como pela ação dos ventos que influenciam estas correntes. Esses fatores são responsáveis pelo transporte, redistribuição e deposição dos sedimentos na área de estudo.ABSTRACTFrom statistical parameters of the bottom morphology and of the application of the diagram of Pejrup it was possible to characterize the dynamic and sedimentary processes that occur in a small cove of the Lagoa dos Patos. The sediments that recover the bottom of the studied area are formed by fine to very fine sands, with the presence of muddy (silt) in the central region and marginal area. The hydrodynamic of the area is dominated by the estuarine circulation and fluvial currents as well, partly due the action of winds which influence these currents. These factors are responsible for the transport, redistribution and deposition of the sediments in the study area.Keywords: sedimentary characterization; hydrodinamics; estuarine cove.
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Jalón-Rojas, I., S. Schmidt, and A. Sottolichio. "Turbidity in the fluvial Gironde Estuary (S–W France) based on 10 year continuous monitoring: sensitivity to hydrological conditions." Hydrology and Earth System Sciences Discussions 12, no. 3 (March 10, 2015): 2843–83. http://dx.doi.org/10.5194/hessd-12-2843-2015.

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Abstract. Climate change and human activities impact the volume and timing of freshwater input to estuaries. These modifications in fluvial discharges are expected to influence estuarine suspended sediment dynamics, and in particular the turbidity maximum zone (TMZ). Located in the southwest France, the Gironde fluvial-estuarine systems has an ideal context to address this issue. It is characterized by a very pronounced TMZ, a decrease in mean annual runoff in the last decade, and it is quite unique in having a long-term and high-frequency monitoring of turbidity. The effect of tide and river flow on turbidity in the fluvial estuary is detailed, focusing on dynamics related to changes in hydrological conditions (river floods, periods of low-water, inter-annual changes). Turbidity shows hysteresis loops at different time scales: during river floods and over the transitional period between the installation and expulsion of the TMZ. These hysteresis patterns, that reveal the origin of sediment, locally resuspended or transported from the watershed, may be a tool to evaluate the presence of remained mud. Statistics on turbidity data bound the range of river flow that promotes the TMZ installation in the fluvial stations. Hydrological indicators of the persistence and turbidity level of the TMZ are also defined. The long-term evolution of these indicators confirms the influence of discharge decrease on the intensification of the TMZ in tidal rivers, and provides a tool to evaluate future scenarios.
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Bogemans, Frieda, Mathieu Boudin, Rindert Janssens, and Cecile Baeteman. "New data on the sedimentary processes and timing of the initial inundation of Lower Khuzestan (SW Iran) by the Persian Gulf." Holocene 27, no. 4 (October 3, 2016): 613–20. http://dx.doi.org/10.1177/0959683616670224.

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The early- and mid-Holocene deposits of the Lower Khuzestan plain at the north-eastern margin of the Persian Gulf have been investigated by means of facies analysis of sediment successions of undisturbed cores. Organic material and molluscs have been selected for dating by radiocarbon whereby possible contamination by hard-water effect is discussed. The results suggest that the Holocene transgression in Mesopotamia may have taken place later than generally accepted. Before ca. 7700–7900 yr cal. BP, the plain was characterized by mud-dominated fluvial systems. During the mid-Holocene, tides invaded the existing valleys, and the sedimentary environment shifted from fluvial to estuarine but not as extensively as has previously been suggested. The estuarine environments lasted for about 2000–2500 years until ca. 4850–5000 yr cal. BP when the seaward part of the plain was again characterized by widespread fluvial sedimentation.
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van den Berg, J. H., J. R. Boersma, and A. van Gelder. "Diagnostic sedimentary structures of the fluvial-tidal transition zone – Evidence from deposits of the Rhine and Meuse." Netherlands Journal of Geosciences 86, no. 3 (September 2007): 287–306. http://dx.doi.org/10.1017/s0016774600077866.

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AbstractIn mesotidal settings the transition of a coastal plain estuary to the river is marked by the change of a multiple ebb and flood channel configuration to a single channel system. At high river discharge fluvial processes operate, whereas in periods of low discharge the flow is complicated by a tidal component and a landward intrusion of the salt wedge. These hydraulic and morphological characteristics make the transitional zone different from the ‘pure’ fluvial and estuarine environment. Inspection of published and unpublished data from a number of outcrops of Recent and Tertiary deposits of the Rhine reveals that also in a sedimentary sense a transitional zone can be recognized. In order to separate this zone from the upstream fluvial and downstream estuarine environment a sedimentological definition of the fluvial-tidal zone is proposed being the part of river that lies between the landward limit of observable effects of tidal-induced flow deceleration on fluvial cross-bedding at low river discharge and the most seaward occurrence of a textural or structural fluvial signature related to the high river stage.
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Etcheber, H., S. Schmidt, A. Sottolichio, E. Maneux, G. Chabaux, J. M. Escalier, H. Wennekes, et al. "Monitoring water quality in estuarine environments: lessons from the MAGEST monitoring programme in the Gironde fluvial-estuarine system." Hydrology and Earth System Sciences Discussions 7, no. 6 (December 7, 2010): 9411–36. http://dx.doi.org/10.5194/hessd-7-9411-2010.

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Abstract. The Gironde estuary, one of the largest European ones, presents temporary low dissolved oxygen content in its fluvial section close to the Bordeaux urban area. In a context of population growth and of long-term environmental changes, the development of a high-frequency monitoring programme of the fluvial-estuarine system of the Gironde, called MAGEST (MArel Gironde ESTuary), had appeared essential to address current and future water-quality issues/evaluations. The objectives of the MAGEST survey programme are to establish a reference database to improve the knowledge of the Gironde estuary functioning, encompassing the aspects of hydrology, sediment dynamics and biogeochemistry. Through examples of results from intratidal to seasonal time scales, we demonstrate how such a time-series is of valuable interest to extract the main trends of its functioning and of the water quality in relation to external forcings (climatology, urban wastes, land use, ...) and to predict the future evolution of the Gironde estuary with global and environmental changes.
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Ralston, David K., W. Rockwell Geyer, Peter A. Traykovski, and Nicholas J. Nidzieko. "Effects of estuarine and fluvial processes on sediment transport over deltaic tidal flats." Continental Shelf Research 60 (June 2013): S40—S57. http://dx.doi.org/10.1016/j.csr.2012.02.004.

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Nittrouer, Charles A., David J. DeMaster, Steven A. Kuehl, Alberto G. Figueiredo, Richard W. Sternberg, L. Ercilio C. Faria, Odete M. Silveira, et al. "Amazon Sediment Transport and Accumulation Along the Continuum of Mixed Fluvial and Marine Processes." Annual Review of Marine Science 13, no. 1 (January 3, 2021): 501–36. http://dx.doi.org/10.1146/annurev-marine-010816-060457.

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Sediment transfer from land to ocean begins in coastal settings and, for large rivers such as the Amazon, has dramatic impacts over thousands of kilometers covering diverse environmental conditions. In the relatively natural Amazon tidal river, combinations of fluvial and marine processes transition toward the ocean, affecting the transport and accumulation of sediment in floodplains and tributary mouths. The enormous discharge of Amazon fresh water causes estuarine processes to occur on the continental shelf, where much sediment accumulation creates a large clinoform structure and where additional sediment accumulates along its shoreward boundary in tidal flats and mangrove forests. Some remaining Amazon sediment is transported beyond the region near the river mouth, and fluvial forces on it diminish. Numerous perturbations to Amazon sediment transport and accumulation occur naturally, but human actions will likely dominate future change, and now is the time to document, understand, and mitigate their impacts.
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Duck, Robert W. "Pioneering, Scottish nineteenth century studies of sedimentary processes in fluvial, estuarine and coastal environments." Scottish Journal of Geology 47, no. 1 (April 4, 2011): 81–87. http://dx.doi.org/10.1144/0036-9276/01-425.

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Lokhorst, Ivar R., Lisanne Braat, Jasper R. F. W. Leuven, Anne W. Baar, Mijke van Oorschot, Sanja Selaković, and Maarten G. Kleinhans. "Morphological effects of vegetation on the tidal–fluvial transition in Holocene estuaries." Earth Surface Dynamics 6, no. 4 (October 9, 2018): 883–901. http://dx.doi.org/10.5194/esurf-6-883-2018.

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Abstract. Vegetation enhances bank stability and sedimentation to such an extent that it can modify river patterns, but how these processes manifest themselves in full-scale estuarine settings is poorly understood. On the one hand, tidal flats accrete faster in the presence of vegetation, reducing the flood storage and ebb dominance over time. On the other hand flow-focusing effects of a tidal floodplain elevated by mud and vegetation could lead to channel concentration and incision. Here we study isolated and combined effects of mud and tidal marsh vegetation on estuary dimensions. A 2-D hydromorphodynamic estuary model was developed, which was coupled to a vegetation model and used to simulate 100 years of morphological development. Vegetation settlement, growth and mortality were determined by the hydromorphodynamics. Eco-engineering effects of vegetation on the physical system are here limited to hydraulic resistance, which affects erosion and sedimentation pattern through the flow field. We investigated how vegetation, combined with mud, affects the average elevation of tidal flats and controls the system-scale planform. Modelling with vegetation only results in a pattern with the largest vegetation extent in the mixed-energy zone of the estuary, which is generally shallower. Here vegetation can cover more than 50 % of the estuary width while it remains below 10 %–20 % in the outer, tide-dominated zone. This modelled distribution of vegetation along the estuary shows general agreement with trends in natural estuaries observed by aerial image analysis. Without mud, the modelled vegetation has a limited effect on morphology, again peaking in the mixed-energy zone. Numerical modelling with mud only shows that the presence of mud leads to stabilisation and accretion of the intertidal area and a slight infill of the mixed-energy zone. Combined modelling of mud and vegetation leads to mutual enhancement with mud causing new colonisation areas and vegetation stabilising the mud. This occurs in particular in a zone previously described as the bedload convergence zone. While vegetation focusses the flow into the channels such that mud sedimentation in intertidal side channels is prevented on a timescale of decades, the filling of intertidal area and the resulting reduction in tidal prism may cause the infilling of estuaries over centuries.
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Shilla, D. "Fluxes and retention of nutrients and organic carbon in Manko estuary, Okinawa, Japan: influence of river discharge variations." Advances in Oceanography and Limnology 5, no. 2 (December 4, 2014): 141. http://dx.doi.org/10.4081/aiol.2014.5354.

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Estuaries are often considered important filters for inorganic and organic nutrients, as they are located between the land and sea. This study reports on the fluvial fluxes and estuarine transformations and retention of dissolved nutrients (total oxidized nitrogen [TON = NO<sub>2</sub><sup>−</sup> and NO<sub>3</sub><sup>−</sup>]), NH<sub>4</sub><sup>+</sup>, PO<sub>4</sub><sup>3−</sup>, and dissolved organic carbon (DOC) in Manko estuary, Okinawa, Japan. The transport and transformation of dissolved nutrients and DOC varied widely among the eight conducted surveys due to variations in freshwater discharge and subsequent flushing times. Under high fluvial discharge, particularly during the May–June rainy season, the transport of nutrients and DOC accounted for up to 70%, 88%, 93%, and 53% of the annual transport of TON, NH<sub>4</sub><sup>+</sup>, PO<sub>4</sub><sup>3−</sup>, and DOC, respectively. The flushing times of river water into the estuary, which varied from 0.5 to 46 days, were important in determining the degree to which fluvial nutrients were transformed and retained within the estuary. The effect of long flushing times was evident during the dry months (December–March), when biological and geochemical processes within the estuary removed most of the fluvial nutrients and DOC.
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Dissertations / Theses on the topic "Fluvial and estuarine processes"

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Geronilla, Kristina. "Re-presenting the Waterfront: revealing the intersection of human and natural processes." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/35894.

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Water and waterfronts are appealing to almost any person, as a visitor or designer. This study challenges the author's design processes and understanding of the landscape as the sculpted meeting ground, intersecting human and natural physical processes. It progresses from assumptions through collaborated ideas of others in a literature review through case studies of various waterfront situations and finally to the design project of the Jones Point waterfront in Alexandria, Virginia. Here the intermingled aspects from cultural activities over time and local, physical movement of land by water are assessed to be revealed and enhanced for the visitor's benefit, use, and connection with place. For it is the author's belief that the landscape and space can be sculpted, experienced, and imagined for the purpose of connecting us to a larger framework of living systems on this planet and beyond. The design extends the city to the waterfront and vice versa with an understanding of both physical processes and cultural choices to the point of being unable to distinguish action from reaction.
Master of Landscape Architecture
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Josko, Troselj. "FLUVIAL INFLUENCE ON ESTUARINE SEDIMENT TRANSPORT PROCESSES AND LINKAGE OF ITS OUTFLOW DATA TO COASTAL MODELING." Kyoto University, 2016. http://hdl.handle.net/2433/217745.

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Unrein, Kevin Scott. "Fluvial to estuarine transition in the middle Bloyd sandstone (Morrowan), northwest Arkansas." Thesis, Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/486.

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Lo, Edward Limin. "FLUVIAL-LACUSTRINE PROCESSES SHAPING THE LANDFORMS OF THE DISTAL PARAGUAY FLUVIAL MEGAFAN." UKnowledge, 2017. http://uknowledge.uky.edu/ees_etds/54.

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Tropical wetlands such as the Pantanal help regulate global biogeochemical cycles, but climate change is modifying these environments. Controls on environmental changes can potentially be assessed from ancient, well-dated lacustrine sedimentary records. An integrated field and laboratory approach was undertaken to study the limnogeology of Lake Uberaba in the northern Pantanal, and test whether the lake has preserved a reliable record of environmental change in its strata. This study was designed to understand how the basin accumulates sediment and to assess its sensitivity to hydroclimatic variability. The data showed that modern Lake Uberaba is a highly dynamic, freshwater fluvial-lacustrine basin. Modern lake floor sediments are largely siliciclastic silts, with limited organic matter content and abundant sponge spicules. This sedimentary composition reflects the lake’s open hydrology and well-mixed water column. Limited data from sediment cores indicates that Lake Uberaba may have formed ~1760 CE, following an abrupt transgression over an oxidized floodplain depositional environment. The stratal contact between lacustrine and floodplain deposits suggests the presence of an erosional unconformity, the timing and duration of which remains unknown. The environmental change favoring lake formation appears to be linked to increased effective precipitation provided by the Intertropical Convergence Zone (ITCZ) in the northern Pantanal.
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Mendes, Renato Paulo dos Santos. "The Douro estuarine plume: detection, processes and dynamics." Doctoral thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/17073.

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Doutoramento em Física
O Douro é um dos maiores rios da Península Ibérica, constituindo a maior descarga de água doce para o Oceano Atlântico na costa noroeste portuguesa. A sua pluma estuarina tem particular relevância na dinâmica costeira e na modulação de fenómenos biogeoquímicos. São objetivos desta dissertação contribuir para a compreensão dos processos físicos associados à geração e propagação da pluma estuarina do Rio Douro no oceano, assim como para o conhecimento dos seus padrões de dispersão e da forma como estes alteram a hidrologia e a circulação costeira, considerando os agentes forçadores típicos deste fenómeno (caudal fluvial, vento e maré) e índices climáticos relevantes. Para concretização destes objetivos foram desenvolvidas e aplicadas metodologias inovadoras de processamento de dados de deteção remota, assim como novas implementações estuarinas e costeiras de modelos numéricos. Através de imagens MODIS, otimizadas para o estudo de fenómenos costeiros, efetuou-se uma deteção rigorosa da pluma. Identificou-se uma relação entre o sinal túrbido nLw555 e o caudal, demonstrando-se este produto como um bom proxy para a observação da pluma no oceano. As escalas temporais e espaciais da pluma foram caraterizadas através destas imagens, combinadas com dados de caudal fluvial, maré, vento e precipitação, e também com índices climáticos relevantes. Para compreender a propagação da pluma e caracterizar a sua dinâmica e impacto na circulação costeira, foi desenvolvida uma aplicação 3D de modelos estuarinos e costeiros com malhas aninhadas de resolução variável. Definiramse e analisaram-se diferentes cenários de vento e descarga fluvial. A interação da pluma do Rio Douro e do Minho foi ainda analisada através dos resultados de simulações baseadas num evento de inverno. Os compósitos túrbidos mostraram que a pluma é facilmente detetada quando o caudal é maior que 500 m3 s􀀀1. A descarga fluvial e o vento são os principais forçadores da sua propagação, enquanto a maré é apenas importante na região próxima à embocadura do estuário. Observaram-se relações a uma escala interanual entre a turbidez da pluma e os índices climáticos East Atlantic e NAO, com uma correlação máxima identificada com 1 e 3 meses de desfasamento, respetivamente. Com base nos resultados das simulações efetuadas, a pluma é classificada como de larga escala e de adveção superficial, apresentando características de uma pluma prototípica. Em condições de caudal moderado a elevado, a descarga estuarina é suficiente para gerar uma corrente costeira para norte sem ação do vento. Em eventos de ventos leste, a propagação da pluma é similar ao caso sem vento, com um aumento da velocidade da corrente. Uma corrente costeira para sul é unicamente identificada sob condições de forte vento de oeste. Ventos de norte tendem a estender a pluma para o largo, com uma inclinação na direção sudoeste, enquanto ventos de sul intensificam a corrente para norte, sendo a mistura das plumas do Douro e do Minho uma consequência possível. A análise desta interação apontou a contribuição do Douro como importante na estabilização da WIBP e nas trocas de água entre o oceano e as Rias Baixas. A interação da pluma do Douro com estuários localizados a sul da sua foz e a confirmação in situ da recirculação observada nos resultados numéricos afiguram-se como temas relevantes para investigações futuras.
The Douro is one of the largest rivers of the Iberian Peninsula, representing the most important freshwater input into the Atlantic Ocean (on the northwestern Portuguese coast). Its estuarine plume has particular relevance on coastal dynamics and biogeochemistry. The main goal of this dissertation is to contribute to increase knowledge on physical processes associated with the generation and propagation of the Douro estuarine plume. The general patterns of dispersion in the ocean and how the plume change hydrography and coastal circulation were also evaluated, considering the typical drivers involved (river discharge, wind and tide) and relevant climate indices. Innovative methodologies to process remote sensing data, as well as new implementations of high-resolution estuarine and coastal numerical models have been developed and applied. The plume was detected through MODIS images, optimized for coastal studies. The relation between the turbid nLw555 signal and river discharge was identified, demonstrating that this product is a good proxy for the observation of the Douro estuarine plume in the coastal ocean. An interconnected approach, combining these images, river discharge, tide, wind and precipitation data, as well as relevant climate indices, was used to study the temporal and spatial scales of the plume. The implementation of estuarine and coastal models with nested domains of variable resolution was developed to understand the plume propagation and characterize its dynamics and impact on coastal circulation. Using these applications, different scenarios of wind and river discharge were defined and analysed. The interaction of the Douro and the Minho estuarine plumes was further evaluated through simulations based on a winter event. Turbid composites showed that the plume is easily detected when river discharge is greater than 500 m3 s􀀀1. River discharge and wind are the main driver acting on the plume propagation, whilst tidal effect is only important near the estuary mouth. A relation between turbid plume and climate indices East Atlantic (EA) and North Atlantic Oscillation (NAO) was observed at inter-annual scale, with a maximum correlation identified at 1 and 3-month lags, respectively. The Douro estuarine plume is classified as large-scale and surface-advected, presenting characteristics of a prototypical plume, based on the results of the numerical simulations. The estuarine outflow is sufficient to generate a northward coastal current without wind action under moderate-to-high river discharge conditions. Under easterly winds, the propagation pattern is similar to the case without wind forcing, with a slight increase in the northward current. A southward coastal current is only generated by strong westerly winds. Under upwellingfavourable winds, the plume extends offshore with tilting towards southwest. Southerly winds increase the velocity of the northward current, being the merging of the Douro and Minho estuarine plumes a likely consequence. The analysis of this interaction pointed out the Douro as an important contributor to the WIBP stabilization and in the water exchange between ocean and Rias Baixas. The interaction of the Douro estuarine plume with estuaries located south of its inlet and the in situ confirmation of the re-circulation bulge observed in numerical results seem as relevant for future research topics.
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Phillips, Zachary Rockford. "Holocene Postglacial Fluvial Processes and Landforms in Low Relief Landscapes." Diss., North Dakota State University, 2020. https://hdl.handle.net/10365/32036.

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Postglacial rivers are part of the relatively young low-relief landscape system left behind by glaciers. Over time, postglacial rivers are susceptible to both minor and major channel planform changes as the Earth and its newly exposed rivers adjust to new isostatic and geomorphic equilibriums. Those planform changes result in topographic features that are well preserved among the largely unaltered landscape and offer opportunities to learn about the processes that create them. This work focuses on those minor and major planform changes and the resulting landforms, with a focus on processes effecting the glaciolacustrine Red River Valley. Here, three studies were conducted, two regarding minor planform changes and one focusing on major planform changes. Studies included in this work regard 1) the spatial distribution of meander cutoffs and meander cutoff relief on the Red River, 2), avulsion timing and length resulting from isostatic tilting and 3) mobile river ice and bank interaction frequency, locations, and erosion in meandering rivers. Results show that rivers develop meander cutoffs that faster in areas where geologic materials are more easily eroded and their relief shows a positive relationship with the rate of river incision. Major channel path changes (avulsions) in the presence of isostatic tilting were found to be most frequent soon after river establishment while rates of isostatic rebound are high enough to outpace channel incision. River ice was found to most frequently interact with the outer banks of channels with long, tight bends and high sinuosity, potentially contributing to the meandering process. From these results it can be interpreted that postglacial rivers were highly dynamic early in their history and have stabilized over time, with most of the changes occurring in areas with more erodible alluvium. Presently, rivers undergo most of their changes during the spring thaw when mobile river ice is impacting the banks, with sinuous river reaches impacted most frequently by mobile river ice.
North Dakota Water Recourses Research Institute (ND WRRI) Fellowship Program
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Al-Enezi, Eqbal Hussain. "Modelling of phosphorus adsorption processes in estuarine and coastal water." Thesis, Cardiff University, 2011. http://orca.cf.ac.uk/54203/.

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This study consists of three parts: (i) Field work and data collection from the Loughor and Severn Estuaries. P adsorption increased with decreasing median sediment size in both estuaries. A positive correlation was found between the P adsorption in sediment and salinity in the Loughor Estuary, whereas a negative correlation was found in the Severn Estuary. Some factors, such as particle grain size, salinity, pH, organic matter, suspended sediment concentration and P concentration were found to control the exchangeable or loosely sorbed P (adsorbed P) in both estuaries. (ii) Laboratory experiments were conducted on P adsorption/desorption on different types on sediment, including Kaolinite, Silica, mud, silt, sand and suspended sediment. P adsorbed to the mud fraction than to the sand fraction. The adsorption coefficient (K d) and Maximum P adsorption (PSMax) for the mud fraction were 0.0091/g and 0.39 mg/g for the silt 0.007 l/g and 0.30 mg/g and the sand 0.001 l/g and 0.05 mg/g. (iii) Flume experiments were conducted in the hydraulic laboratory at Cardiff University, U.K. The main findings revealed that the velocity and the P concentrations in the water were important factors controlling the amount of P adsorbed processes on the sediment. The results from the field work and the laboratory experiments were similar to flume channel findings. These findings were used to develop new source term equations and these equations were added to the QUAL2E water quality model to improve the capability of the model to predict the P adsorption processes in a 2D computer model. These new equations were then used to simulate P concentrations in the estuarine environment using DIVAST.
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Tsou, Ching-Ying. "Landscape Evolution by Fluvial Processes and Gravitational Slope Processes in Tectonically Active Mountains in Taiwan." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188494.

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Coffey, Michael. "The behaviour of trace metals in the Humber Estuary, U.K." Thesis, University of East Anglia, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240991.

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Markull, Katrin. "Arrestment of the estuarine plume in Maputo bay, Mozambique." Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12213.

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Mestrado em Ciências do Mar e das Zonas Costeiras
Maputo Bay is a tidally-energetic embayment in Mozambique, influenced by strong rainfall and associated river runoff during the wet season. Previous investigations have suggested the arrestment of the freshwater plume related to high mixing during spring tide, eroding stratification and preventing an efficient exchange with the shelf due to the hampering of density currents. It was suggested that, with decreasing mixing towards neap tide, the bay would re-stratify, releasing the estuarine plume. The objective of this dissertation was to find out whether and under which conditions this arrestment of the estuarine plume occurs in Maputo Bay. A 3-dimensional hydrodynamic model was applied to the bay, improving a previously published model through vertical and temporal refinement and recalibration. It is shown that now the model reproduces more accurately the semidiurnal and fortnightly stratification-mixing cycles occurring during the wet season. However, the model still predicts salinities lower than those found in observations. Uncertainties increase towards the mouth of the Maputo River, for which only modelled river flow data was available to force the bay dynamics, indicating this input as a possible source of the underestimation of salinity. The effect of varying river discharges, varying timings of discharge as well as varying discharge ratios on flushing times was investigated through a set of experiments of varying Maputo and Incomati river flows as well as timings of discharge during the spring-neap cycle. The results suggest that when no discharge or a small discharge is introduced, flushing times are smallest during spring tide, when barotropic forcing is strong. Largest flushing times are found approximately 40 hours before neap tide, when tidal forcing is relatively weak. Flushing times for model runs with larger discharge were smaller due to the addition of flushing from river water. Here, flushing times were especially small during neap tide, when the decreased tidal mixing lead to stratification through which a classical estuarine circulation could develop, leading to an efficient bay-shelf exchange. Maximum flushing times for high-discharge runs during wet season were found for spring tide. Shelf-bay exchange was most efficient when the discharge of the Maputo River was larger than the discharge of the Incomati River, due to its location opposite the bay opening, thus influencing a larger area before leaving the bay. Timing of the discharge of the freshwater had only small effects, influencing the amount of mixing induced on the freshwater when first entering the bay. It is concluded that the estuarine plume of Maputo Bay is in fact arrested during spring tide due to the large mixing inhibiting density currents and is released when mixing decreases, inducing stratification and baroclinic circulation. The potential energy stored in the bay is larger for a larger discharge of the Maputo River.
A Baía de Maputo, em Moçambique, é uma baía com marés energéticas, influenciada pelo escoamento dos rios associado a forte precipitação durante a estação húmida. Investigações anteriores têm sugerido que o aprisionamento da pluma de água doce está relacionado com a elevada mistura durante a maré viva, que por sua vez provoca a erosão da estratificação e impede a troca eficiente com a plataforma continental, dificultando o estabelecimento de correntes de densidade. Foi sugerido que com a diminuição da mistura durante a maré morta a baía seria re-estratificada, libertando a pluma estuarina. O objetivo desta dissertação foi averiguar se, e em que condições, este aprisionamento da pluma estuarina ocorre na baía de Maputo. Foi aplicado um modelo hidrodinâmico 3-d para a baía, resultante do melhoramento de um modelo publicado anteriormente, através do refinamento vertical e temporal e recalibração. É demonstrado que agora o modelo reproduz com mais precisão os ciclos de estratificação/mistura semidiurnas e quinzenais que ocorrem durante a estação chuvosa. No entanto, o modelo ainda prevê salinidades inferiores as encontradas em observações. As incertezas aumentam próximo da foz do Rio Maputo, para o qual existem apenas dados de modelos de bacia para forçar o modelo, indicando esta entrada como uma possível causa da subestimação da salinidade. Foi definido um conjunto de experiências de diferentes descargas dos Rios Maputo e Incomati, sendo estes introduzidos no modelo em fárias fases do ciclo da maré. Foi investigado o efeito da variação da duração das descargas fluviais e da proporção do Maputo e do Incomati nos tempos de renovação da água na baía. Os resultados sugerem que quando há uma pequena descarga dos rios, os tempos de renovação são menores durante a maré viva, quando o forçamento barotrópico é forte. Os maiores tempos de renovação encontram-se cerca de 40 horas antes da maré morta. Os tempos de renovação para as corridas com maior descarga são menores devido à adição de descargas de água do rio. Neste caso, os tempos de renovação foram especialmente pequenos durante a maré morta, quando a diminuição da mistura pela maré induz estratificação, criando condições para o desenvolvimento da circulação estuarina clássica, e escoando a baía eficiente. Tempos máximos de renovação para corridas de alta descarga durante a estação chuvosa foram encontrados em condições mistas de maré viva. O intercâmbio entre a baía e a plataforma continental foi mais eficiente para uma maior proporção do Rio Maputo em relação ao Rio Incomati. Este padrão justifica-se pela maior distância da foz do Rio Maputo à entrada da baía. A variação do momento da descarga de água doce em relação à fase da maré tem efeitos pouco significativos (ou pouco relevantes), determinando apenas o grau de mistura que influencia a água doce nas primeiras horas a seguir da descarga. Concluiu-se que existe um aprisionamento da pluma estuarina da Baía de Maputo. Este aprisionamento ocorre durante a elevada mistura de maré viva. A energia potencial armazenada na baía é maior para uma descarga maior do Rio Maputo.
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Books on the topic "Fluvial and estuarine processes"

1

Fluvial Forms and Processes. 2nd ed. London: Arnold, 1998.

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1924-, Wolman M. Gordon, and Miller John P. 1923-1961, eds. Fluvial processes in geomorphology. New York: Dover Publications, 1995.

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Coastal and estuarine processes. New Jersey: World Scientific, 2009.

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Chang, Howard H. Fluvial processes in river engineering. Malabar, Fla: Krieger Publishing Co., 1992.

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Fluvial processes in river engineering. Malabar, Fla: Krieger Pub. Co., 1992.

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H, Chang Howard. Fluvial processes in river engineering. New York: Wiley, 1988.

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G, Brown A., and Quine T. A, eds. Fluvial processes and environmental change. Chichester: J. Wiley, 1999.

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Graf, William L. Fluvial processes in dryland rivers. Berlin: Springer-Verlag, 1988.

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Graf, William L. Fluvial Processes in Dryland Rivers. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83048-8.

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Chalov, Roman S. Fluvial Processes: Theory and Applications. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66183-0.

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Book chapters on the topic "Fluvial and estuarine processes"

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Downs, Peter W., and Gary Priestnall. "Modelling Catchment Processes." In Tools in Fluvial Geomorphology, 205–30. Chichester, UK: John Wiley & Sons, Ltd, 2005. http://dx.doi.org/10.1002/0470868333.ch8.

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Miall, Andrew. "Autogenic Processes: Avulsion and Architecture." In Fluvial Depositional Systems, 69–119. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00666-6_3.

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Surian, Nicola. "Fluvial Processes in Braided Rivers." In Rivers – Physical, Fluvial and Environmental Processes, 403–25. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17719-9_15.

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Dey, Subhasish. "Fluvial Processes: Meandering and Braiding." In GeoPlanet: Earth and Planetary Sciences, 529–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-19062-9_9.

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Thompson, Roy, and Frank Oldfield. "Magnetic minerals and fluvial processes." In Environmental Magnetism, 88–100. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-011-8036-8_9.

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Chalov, Roman S. "Natural Factors of Fluvial Processes." In Fluvial Processes: Theory and Applications, 79–192. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66183-0_2.

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Wiseman, W. J. "Estuarine-shelf interactions." In Baroclinic Processes on Continental Shelves, 109–15. Washington, D. C.: American Geophysical Union, 1986. http://dx.doi.org/10.1029/co003p0109.

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Simpson, J. H., and I. D. James. "Coastal and estuarine fronts." In Baroclinic Processes on Continental Shelves, 63–93. Washington, D. C.: American Geophysical Union, 1986. http://dx.doi.org/10.1029/co003p0063.

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McClimans, T. A. "Estuarine Fronts and River Plumes." In Physical Processes in Estuaries, 55–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73691-9_4.

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Chalov, Roman S. "Conditions of River Channel Formation and Their Hydrology and Morphology Analysis." In Fluvial Processes: Theory and Applications, 193–294. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66183-0_3.

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Conference papers on the topic "Fluvial and estuarine processes"

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Duarte, A. A. L. S., and J. M. P. Vieira. "Mitigation of estuarine eutrophication processes by controlling freshwater inflows." In RIVER BASIN MANAGEMENT 2009. Southampton, UK: WIT Press, 2009. http://dx.doi.org/10.2495/rm090311.

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Konkler, Jon L., Doug S. Hastings, Debra H. McGimsey, Henry Posamentier, and Mark H. Leander. "Tabasco Valley, North Slope, Alaska, a shallow fluvial/estuarine reservoir mapped with 3D seismic data." In SEG Technical Program Expanded Abstracts 1997. Society of Exploration Geophysicists, 1997. http://dx.doi.org/10.1190/1.1885857.

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Ji, Zhen-Gang, Michael R. Morton, and John H. Hamrick. "Modeling Hydrodynamic and Water Quality Processes in a Reservoir." In Eighth International Conference on Estuarine and Coastal Modeling. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40734(145)38.

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"River flow and transport processes." In The International Conference On Fluvial Hydraulics (River Flow 2016). Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315644479-9.

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Holste, N. "Restoring natural river processes through channel realignment." In The International Conference On Fluvial Hydraulics (River Flow 2016). Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315644479-324.

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Shawler, Justin L., and Christopher J. Hein. "ESTUARINE RECORDS OF LONG-TERM HUMAN IMPACTS ON FLUVIAL SEDIMENT DISCHARGE FROM A LARGE NEW ENGLAND RIVER." In 65th Annual Southeastern GSA Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016se-273677.

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Khangaonkar, Tarang, Stephen Breithaupt, and Felix Kristanovich. "Restoration of Hydrodynamic and Hydrologic Processes in the Chinook River Estuary, Washington — Feasibility Assessment." In Ninth International Conference on Estuarine and Coastal Modeling. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40876(209)42.

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Li, Yuepeng, Mark J. Brush, Harry V. Wang, Iris C. Anderson, and G. McAllister Sisson. "Effects of Benthic Microalgae on Eutrophication Processes — A Laboratory Experiment and the Model Simulation." In 10th International Conference on Estuarine and Coastal Modeling. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40990(324)32.

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Smith, S. J., M. D. Peterson, and T. C. Pratt. "Numerical Modeling Studies Supporting Port of Anchorage Deepening and Expansion: Part II; Measuring Physical Processes." In 11th International Conference on Estuarine and Coastal Modeling. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41121(388)18.

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Greco, M., C. Di, S. Evangelista, A. Leopardi, M. Iervolino, and A. Vacca. "Experimental investigation of embankment erosion during fast geomorphic processes." In The International Conference On Fluvial Hydraulics (River Flow 2016). Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315644479-77.

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Reports on the topic "Fluvial and estuarine processes"

1

Bryan, Frank, John Dennis, Parker MacCready, and Michael Whitney. Collaborative Project: Improving the Representation of Coastal and Estuarine Processes in Earth System Models. Office of Scientific and Technical Information (OSTI), October 2016. http://dx.doi.org/10.2172/1329376.

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Bryan, Frank, John Dennis, Parker MacCready, and Michael Whitney. Final Report Collaborative Project. Improving the Representation of Coastal and Estuarine Processes in Earth System Models. Office of Scientific and Technical Information (OSTI), November 2015. http://dx.doi.org/10.2172/1226494.

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Bryan, Frank, John Dennis, Parker MacCready, and Michael M. Whitney. Final Report Collaborative Project: Improving the Representation of Coastal and Estuarine Processes in Earth System Models. Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1356337.

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Wallerstein, N., and C. R. Thorne. Impacts of Woody Debris on Fluvial Processes and Channel Morphology in Stable and Unstable Streams. Fort Belvoir, VA: Defense Technical Information Center, June 1995. http://dx.doi.org/10.21236/ada286853.

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Wallerstein, N., and C. R. Thorne. Impacts of Woody Debris on Fluvial Processes and Channel Morphology in Stable and Unstable Streams. Fort Belvoir, VA: Defense Technical Information Center, June 1997. http://dx.doi.org/10.21236/ada286930.

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Wallerstein, N., and C. R. Thorne. Impacts of Woody Debris on Fluvial Processes and Channel Morphology in Stable and Unstable Streams. Fort Belvoir, VA: Defense Technical Information Center, May 1996. http://dx.doi.org/10.21236/ada286933.

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Ogston, Andrea S. Processes Controlling Transfer of Fine-Grained Sediment in Tidal Systems Spanning a Range of Fluvial Influence. Fort Belvoir, VA: Defense Technical Information Center, September 2012. http://dx.doi.org/10.21236/ada572944.

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Smith, S. Jarrell, David W. Perkey, and Kelsey A. Fall. Cohesive Sediment Field Study : James River, Virginia. U.S. Army Engineer Research and Development Center, August 2021. http://dx.doi.org/10.21079/11681/41640.

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Abstract:
Estuaries trap much of the fine sediment delivered to them by rivers. This phenomenon presents challenges to the US Army Corps of Engineers (USACE) navigation mission, which maintains navigable waterways for waterborne commerce through estuarine regions. The USACE Regional Sediment Management Program and the USACE Norfolk District are conducting a regional sediment transport modeling study to identify cost-effective sediment management schemes in the James River, a tributary estuary of Chesapeake Bay. A key element of the sediment transport modeling study is the definition of cohesive sediment transport processes, such as erosion and settling velocity. This report describes field-based measurements of cohesive sediment erosion and settling velocity conducted in November 2017. The team conducted erosion testing on 15 cores collected throughout the tidal system. Additionally, two anchor stations were occupied to measure tidal variations in vertical distributions of suspended sediment concentration, particle size, and settling velocity. Recommended cohesive sediment transport parameters were developed from the field measurements.
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