Relevant bibliographies by topics / Sediment Transport Dynamics

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Academic literature on the topic 'Sediment Transport Dynamics'

Author: Grafiati
Published: 2 June 2025
Last updated: 19 July 2025

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Journal articles on the topic "Sediment Transport Dynamics"

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Shimozono, Takenori, Takashi Yamano, and Yoshimitsu Tajima. "IN-SITU OBSERVATION OF HYDRO-SEDIMENT DYNAMICS ON STEEPLY SLOPING SEABED IN DEEP WATER." Coastal Engineering Proceedings, no. 38 (May 29, 2025): 62. https://doi.org/10.9753/icce.v38.sediment.62.

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Evaluating the local sediment balance is a crucial component of effective coastal erosion management. Traditionally, we set a depth of closure in a target coastal area, representing the point beyond which sediment transport is assumed to be minimal. This concept helps us maintain the assumption that the sediment budget remains balanced landward. However, during extreme events, sediment transport can exceed this depth, leading to a loss of coastal sediments. This scenario is particularly relevant for coasts adjacent to a steep offshore slope, where sediments released onto the slope may never return to the upper coast. The process of downward sediment transport in the lower shoreface remains poorly understood, primarily due to the inherent challenges associated with in-situ observations of sediment dynamics in deep water. Our study aims to explore the characteristics of near-bed flows and sediment transport on steep slopes in deep water.
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Thunyaphun, Tussanun, Shinya Umeda, and Masatoshi Yuhi. "Sediment Budget and Net Sediment Transport on a Coast Dominated by Waves and Offshore Currents: A Case Study on the Ishikawa Coast and Its Surrounding Areas in Japan." Journal of Marine Science and Engineering 11, no. 3 (2023): 621. http://dx.doi.org/10.3390/jmse11030621.

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This study discusses the coastal sediment budget for the Ishikawa coast using 12 years of observational datasets; it involves an understanding the local and regional sediment dynamics, the intensity of the transport processes in the region, and sediment supply from a local river. Although alongshore sediment transport and sediment budgets have been analyzed in previous studies, only a few conducted cross-shore sediment transport evaluations. The concentration of suspended sediments will be determined in this study, taking into account the influence of waves that are associated with the coastal current. The cross-shore sediment transport using sediment budget analysis indicated that the net alongshore sediment transport directions in the surf and offshore zones are opposite on the Ishikawa coast. The increase in the sediment budget of the surf zone can be attributed to the river sediment supply and longshore sediment transport inflow. Because of the significant outflow components of longshore and cross-shore sediment transports, the offshore zone budget showed a decreasing trend. A detailed sensitivity study was performed by varying the input parameters, in order to determine the possible ranges of net transport rates and sediment transport to the adjacent coasts. The results demonstrated the possibility of a clockwise residual sediment circulation. Our method can be used to analyze the alongshore sediment transport for other coasts and supplement future studies on coastal sedimentology and sediment budgets.
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Carrillo, Ricardo, and Luca Mao. "Coupling Sediment Transport Dynamics with Sediment and Discharge Sources in a Glacial Andean Basin." Water 12, no. 12 (2020): 3452. http://dx.doi.org/10.3390/w12123452.

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Suspended and bedload transport dynamics on rivers draining glacierized basins depend on complex processes of runoff generation together with the degree of sediment connectivity and coupling at the basin scale. This paper presents a recent dataset of sediment transport in the Estero Morales, a 27 km2 glacier-fed basin in Chile where suspended sediment concentration (SSC) and bedload (BL) fluxes have been continuously monitored during two ablation seasons (2014–2015 and 2015–1016). The relationship between discharge and SSC depends on the origin of runoff, which is higher during glacier melting, although the hysteresis index reveals that sediment sources are closer to the outlet during snowmelt. As for suspended sediment transport, bedload availability and yield depend on the origin of runoff. Bedload yield and bedload transport efficiency are higher during the glacier melting period in the first ablations season due to a high coupling to the proglacial area after the snowmelt period. Instead, on the second ablation seasons the peak of bedload yield and bedload transport efficiency occur in the snowmelt period, due to a better coupling of the lower part of the basin caused by a longer permanency of snow. Differences in volumes of transported sediments between the two seasons reveal contrasting mechanisms in the coupling dynamic of the sediment cascade, due to progressive changes of type and location of the main sources of runoff and sediments in this glacierized basin. The paper highlights the importance of studying these trends, as with retreating glaciers basins are likely producing less sediments after the “peak flow”, with long-term consequences on the ecology and geomorphology of rivers downstream.
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Wu, Yuxi, Xiwen Li, Enjin Zhao, et al. "Analysis of Downstream Sediment Transport Trends Based on In Situ Data and Numerical Simulation." Journal of Marine Science and Engineering 12, no. 11 (2024): 1982. http://dx.doi.org/10.3390/jmse12111982.

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This study conducted an in-depth analysis of the sediment dynamics in the lower reaches of the Changhua River and its estuary on Hainan Island. Through field collection of topographic data and sediment sampling, combined with advanced computational techniques, the study explored the transport pathways and depositional patterns of sediments. The grain size trend analysis (GSTA) method was utilized, in conjunction with the Flemming triangle diagram method, to classify the dynamic environment of the sediments. Furthermore, hydrodynamic modeling results were integrated to further analyze the transport trends of the sediments. The study revealed that the sediment types in the research area are complex, primarily consisting of gravelly sand and sandy gravel, indicating a generally coarse sedimentary environment in the region. The sediments in the lower reaches of the Changhua River generally transport towards the south and southwest (in the direction of Beili Bay). The net sediment transport directions inferred from the GSTA model are largely consistent with the Eulerian residual flow patterns, especially in the offshore area, where discrepancies are observed in the nearshore zone. The nearshore transport is influenced by the combined effects of alongshore currents, residual flows, and river inputs, while the offshore transport exhibits a shift from the northwest to southwest directions, reflecting the regional circulation patterns.
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Mėžinė, Jovita, Christian Ferrarin, Diana Vaičiūtė, Rasa Idzelytė, Petras Zemlys, and Georg Umgiesser. "Sediment Transport Mechanisms in a Lagoon with High River Discharge and Sediment Loading." Water 11, no. 10 (2019): 1970. http://dx.doi.org/10.3390/w11101970.

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The aim of this study was to investigate the sediment dynamics in the largest lagoon in Europe (Curonian Lagoon, Lithuania) through the analysis of in situ data and the application of a sediment transport model. This approach allowed to identify the propagation pathway of the riverine suspended sediments, to map erosion-accumulation zones in the lagoon and calculate the sediment budget over a 13-year-long simulation. Sampled suspended sediment concentration data are important for understanding the characteristics of the riverine and lagoon sediments, and show that the suspended organic matter plays a crucial role on the sediment dynamics for this coastal system. The numerical experiments carried out to study sediment dynamics gave satisfactory results and the possibility to get a holistic view of the system. The applied sediment transport model with a new formula for settling velocity was used to estimate the patterns of the suspended sediments and the seasonal and spatial sediment distribution in the whole river–lagoon–sea system. The numerical model also allowed understanding the sensitivity of the system to strong wind events and the presence of ice. The results reveal that during extreme storm events, more than 11.4 × 106 kg of sediments are washed out of the system. Scenarios without ice cover indicate that the lagoon would have much higher suspended sediment concentrations in the winter season comparing with the present situation with ice. The results of an analysis of a long-term (13 years) simulation demonstrate that on average, 62% of the riverine sediments are trapped inside the lagoon, with a marked spatially varying distribution of accumulation zones.
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Blom, G., and H. J. Winkels. "Modelling sediment accumulation and dispersion of contaminants in Lake Ijsselmeer (The Netherlands)." Water Science and Technology 37, no. 6-7 (1998): 17–24. http://dx.doi.org/10.2166/wst.1998.0730.

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In this study two models are integrated for the simulation of sediment distribution and quality in the Lake IJsselmeer area. STRESS-2d, a two dimensional dynamic model for simulation of sediment transport due to resuspension, erosion, sedimentation and horizontal advection and dispersion is used to simulate the sediment transport dynamics for a period of one year. The model is calibrated on water level, suspended solids concentration and sedimentation flux measurements. The model has a high spatial and temporal resolution. The model DIASPORA, which is based on STRESS-2d results, simulates the effects of sediment transport on morphology and contaminant concentrations in the sediment for a period of decades. DIASPORA also simulates dilution by internally produced CaCO3 and consolidation of sediment layers. The models produce a reasonable reconstruction of suspended solids concentrations and long term accumulation of sediments in deep areas within the lake. Also the temporal and spatial variability in the contaminant concentration in sediments in Lake IJsselmeer is reconstructed with sufficient quality. Model simulations show that internal redistribution of old deposits in the IJsselmeer area and internal production of CaCO3 are diluting the contaminated solids supplied by the river IJssel.
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Kabir, M. A., D. Dutta, and S. Hironaka. "Process-based distributed modeling approach for analysis of sediment dynamics in a river basin." Hydrology and Earth System Sciences 15, no. 4 (2011): 1307–21. http://dx.doi.org/10.5194/hess-15-1307-2011.

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Abstract. Modeling of sediment dynamics for developing best management practices of reducing soil erosion and of sediment control has become essential for sustainable management of watersheds. Precise estimation of sediment dynamics is very important since soils are a major component of enormous environmental processes and sediment transport controls lake and river pollution extensively. Different hydrological processes govern sediment dynamics in a river basin, which are highly variable in spatial and temporal scales. This paper presents a process-based distributed modeling approach for analysis of sediment dynamics at river basin scale by integrating sediment processes (soil erosion, sediment transport and deposition) with an existing process-based distributed hydrological model. In this modeling approach, the watershed is divided into an array of homogeneous grids to capture the catchment spatial heterogeneity. Hillslope and river sediment dynamic processes have been modeled separately and linked to each other consistently. Water flow and sediment transport at different land grids and river nodes are modeled using one dimensional kinematic wave approximation of Saint-Venant equations. The mechanics of sediment dynamics are integrated into the model using representative physical equations after a comprehensive review. The model has been tested on river basins in two different hydro climatic areas, the Abukuma River Basin, Japan and Latrobe River Basin, Australia. Sediment transport and deposition are modeled using Govers transport capacity equation. All spatial datasets, such as, Digital Elevation Model (DEM), land use and soil classification data, etc., have been prepared using raster "Geographic Information System (GIS)" tools. The results of relevant statistical checks (Nash-Sutcliffe efficiency and R–squared value) indicate that the model simulates basin hydrology and its associated sediment dynamics reasonably well. This paper presents the model including descriptions of the various components and the results of its application on two case study areas.
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Kabir, M. A., D. Dutta, and S. Hironaka. "Process-based distributed modeling approach for analysis of sediment dynamics in a river basin." Hydrology and Earth System Sciences Discussions 7, no. 4 (2010): 5685–735. http://dx.doi.org/10.5194/hessd-7-5685-2010.

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Abstract. Modeling of sediment dynamics for developing best management practices of reducing soil erosion and of sediment control has become essential for sustainable management of watersheds. Precise estimation of sediment dynamics is very important since soils are a major component of enormous environmental processes and sediment transport controls lake and river pollution extensively. Different hydrological processes govern sediment dynamics in a river basin, which are highly variable in spatial and temporal scales. This paper presents a process-based distributed modeling approach for analysis of sediment dynamics at river basin scale by integrating sediment processes (soil erosion, sediment transport and deposition) with an existing process-based distributed hydrological model. In this modeling approach, the watershed is divided into an array of homogeneous grids to capture the catchment spatial heterogeneity. Hillslope and river sediment dynamic processes have been modeled separately and linked to each other consistently. Water flow and sediment transport at different surface grids and river nodes are modeled using one-dimensional kinematic wave approximation of Saint-Venant equations. The mechanics of sediment dynamics are integrated into the model using representative physical equations after a comprehensive review. The model has been tested on river basins in two different hydro climatic areas, the Abukuma River Basin, Japan and Latrobe River Basin, Australia. Sediment transport and deposition are modeled using Govers transport capacity equation. All spatial datasets, such as, Digital Elevation Model (DEM), land use and soil classification data, etc., have been prepared using raster "Geographic Information System (GIS)" tools. The results of relevant statistical checks (Nash-Sutcliffe efficiency and R-squared value) indicate that the model simulates basin hydrology and its associated sediment dynamics reasonably well. This paper presents the model including descriptions of the various components and the results of its application on case study areas.
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Ubah, Joseph Ikenna, Louis Chukwuemeka Orakwe, Nelson Mbanefo Okoye, and Kingsely Nnaemeka Ogbu. "River Sediment Transport Modeling of Ele River using Computational Fluid Dynamics Model of COMSOL Multiphysics Program." ASM Science Journal 16 (July 15, 2021): 1–7. http://dx.doi.org/10.32802/asmscj.2021.562.

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Excessive sediment deposition results to hydro-ecological problems particularly for shallow streams that experience significant point-source pollution. In recent times, models have been employed to investigate sediment transport in river systems. The aim of this research work is to model sediment transport of Ele River using particle tracing methodology. The governing equations of fluid flow and particle movement were modelled using COMSOL Multiphysics 5.3a. The result was validated using experimental data and the model result showed good agreement with coefficient of determination of 0.99. Study results showed that sediment at the river banks posses lower velocities compared to sediments in midstream. This implies higher sediment deposition at the banks due to low flow velocity. These sediments deposition constitute problems to the river system through degradation of water quality and blocking irrigation nozzles, impacting irrigation efficiency and crop production.
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Taslin, Puteri Nurfarah Adawiyah, Siti Nur Hanani Zainuddin, Aliashim Albani, Khairul Nizam Abdul Maulud, Mardiha Mokhtar, and Effi Helmy Ariffin. "Wave-driven process influencing aeolian sediment transport in beach dune systems: A review." Maritime Technology and Research 7, no. 4 (2025): 276936. https://doi.org/10.33175/mtr.2025.276936.

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Aeolian processes involve wind-driven emission, transport, and deposition of sand and dust, with sediment transport serving as a key source of sediment for coastal sand dunes. However, beaches today are increasingly out of equilibrium due to human activities, such as coastal development and climate change, which disrupt natural sediment dynamics and lead to localized erosion and accretion along coasts. This imbalance calls for comprehensive strategies to restore and maintain beach system stability. As predicting sediment transport rates is crucial for determining dune sediment budgets, it is essential to consider wave-driven sediment transport. This paper reviews the impact of wave-driven processes on aeolian sediment transport within beach dune systems. By examining sediment transport dynamics in specific coastal environments, this study aims to shed light on the wave-driven formation of aeolian sediment features. Following the ROSES (RepOrting standards for Systematic Evidence Syntheses) guidelines, this review includes a diverse range of studies sourced from the Scopus, Web of Science, and Dimensions databases. Thematic analysis identified three key areas: aeolian processes, the driving factors impacting aeolian transport, and methods to control wave-induced aeolian transport. The findings of this study advance understanding of the role of waves in shaping aeolian sediment dynamics, offering valuable insights for future research in this field. Highlights Human-induced disturbances disrupt natural sediment dynamics, leading to erosion and accretion along coastlines. The study explores the interplay between wave-driven processes and aeolian sediment transport. It offers a comprehensive approach to understanding the impact of wave dynamics on aeolian sediment. The research provides a detailed review of wave-driven processes influencing sediment transport in beach dune systems. It emphasizes the need for further research to understand the nuanced interplay between wave dynamics and sediment transport mechanisms within coastal environments.
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Dissertations / Theses on the topic "Sediment Transport Dynamics"

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Fugate, David C. "Estuarine suspended aggregate dynamics and characteristics." W&M ScholarWorks, 2002. http://www.vims.edu/physical/projects/CHSD/publications/reports/F2002%5FPHD.pdf.

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Tattersall, Graham Richard. "Tamar estuary sediment dynamics." Thesis, Bangor University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341218.

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Beck, Julia S. "Sediment transport dynamics in South African estuaries." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/1465.

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Thesis (PhD (Civil Engineering))--University of Stellenbosch, 2005.<br>Estuaries are complex water bodies and differ considerably from fluvial river systems. In estuaries the flow reverses regularly due to the tidal currents and flow depths depend primarily on the tides and not the flow. An estuary has two sources of sediment: the river during floods and the ocean that supplies marine sediment through littoral drift which is transported by tidal currents into the estuary. Oversimplified models cannot be used to investigate the hydrodynamics and geomorphology of an estuary due to its complexity. Sedimentation of South African estuaries has created several environmental and social problems. Sediment transport imbalances have been caused by changes in the river catchments such as increased sediment yields and flood peak attenuation due to dam construction. Historically floods used to flush estuaries to maintain the long-term sediment balance in the river-estuary system, but with reduced flood peaks, sediment transport capacities at the estuaries are reduced and flushing efficiency decreased, resulting in marine transport dominating in many estuaries. Two-dimensional (horizontal, 2DH) numerical models have been found to be appropriate tools for studying hydro- and sediment dynamics in SA estuaries. The modelling shows that the sediment balance in the estuary relies on a delicate balance between dominant flood and ebb flows. Although the models performed very well, there are still additional processes to include such as time varying roughness changes and cohesive sediments. For long-term and long reach simulations, onedimensional (or quasi-two-dimensional) models will also be required in future. Mathematical modeling can be used to simulate the flushing of sediments during floods, but attempts should be made to calibrate these models when adequate field data become available in the future. The modelling has shown that floods play a very important part in estuarine sediment transport processes. Physical modelling was undertaken of the breaching of an estuary mouth. The main aim was to illustrate the merits of breaching at higher water levels as well as to investigate the changes in the mouth during breaching. The data obtained from the experiments were used to calibrate and verify a mathematical model. Mathematical modelling of the breaching process at the Klein River estuary confirms what has been observed during numerous breachings in the field, i.e. that breaching at higher water levels and towards the southeast side is more effective. Sediment transport by both waves and currents was investigated. It was found that with increasing wave and stream power, sediment transport rates would increase if both waves and currents travelled in the same direction. In contrast, it seems that with the current direction opposing that of the waves, Hydraulics of Estuarine Sediment Transport Dynamics in South Africa iii greater wave heights resulted in lower sediment transport rates. A new sediment transport equation, based on stream power, wave power, as well as sediment size was calibrated and verified, and compared to the well-known Bijker formula.
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Thorpe, Antony. "Sediment transport and bedform dynamics in rip currents." Thesis, University of Plymouth, 2016. http://hdl.handle.net/10026.1/6558.

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Simultaneous in-situ measurements of waves, currents, water depth, suspended sediment concentrations and bed profiles were made in a rip channel on Perranporth Beach, Cornwall, UK. Perranporth is a high energy beach (annual offshore Hs = 1.6 m) which is macro-tidal (mean spring range = 6.3 m) and the grain size is medium sand (D50 = 0.28 – 0.34 mm). It can be classified as a low tide bar – rip beach and exhibits a relatively flat inter-tidal zone with pronounced rhythmic low tide bar - rip morphology. Data were collected over two field campaigns, totalling 14 tidal cycles and including 27 occurrences of rip currents, in a range of offshore wave heights (Hs = 0.5 – 3 m). The in-situ measurements were supplemented with morphological beach surveys. Sediment samples were taken for grain size analysis. The rip current was found to be tidally modulated. The strongest rip flow (0.7 m/s) occurred at mid to low tide, when waves were breaking on the adjacent bar. Rip flow persisted when the bar had dried out at the lowest tidal elevations. The rip was observed to pulse at a very low frequency (VLF) with a period of 15 - 20 minutes, which was shown to be influenced by wave breaking on the adjacent bar. The rip was completely in-active at high tide. Bedforms were ubiquitous in the rip channel and occurred at all stages of the tide. Visual observations found bedforms to be orientated shore parallel. When the rip was active, mean bedform length and height was 1.45 m and 0.06 m respectively. The size and position of the bedforms in the nearshore suggested that they were best classified as megaripples. When the rip was not active, the mean bedform length and height was 1.09 m and 0.06 m respectively. In rip conditions, with typical mean offshore flow rates of > 0.3 m/s, the bedforms migrated in an offshore direction at a mean rate of 0.16 cm/min and a maximum rate of 4.6 cm/min. The associated mean bedform sediment transport rate was 0.0020 kg/m/s, with a maximum rate of 0.054 kg/m/s. In the rip, migration rates were correlated with offshore directed mean flow strength. In non-rip conditions, bedform migration was onshore directed with a mean rate of 0.09 cm/min and a maximum rate of = 2.2 cm/min. The associated mean bedform transport rate was 0.0015 kg/m/s, with a maximum rate of = 0.041 kg/m/s. The onshore bedform transport was correlated with incident wave skewness, and was weakly correlated with orbital velocity. Over a tidal cycle, the offshore directed bedform transport was only marginally larger in rip currents than when it was when onshore directed in non-rip conditions. Sediment suspension in the rip current was shown to be dependent on the presence of waves. Suspended sediment transport was dominated by the mean flux. The mean flux contributed > 70% of total suspended transport on 19 out of the 27 observed rip current occurrences. The net contribution of the oscillatory flux was small compared to the mean flux. Within the oscillatory component, a frequency domain partitioning routine showed that the VLF motion was an important mechanism for driving offshore directed sediment transport. This was balanced by onshore directed sediment transport at incident wave frequency of a similar magnitude. Depth integration showed that the mean total suspended sediment transport was in the range of 0.03 kg/m/s to 0.08 kg/m/s. At high tide, when the rip was inactive suspended sediment transport rates were minimal compared to when the rip was active. Bedform transport was (on average) 6% of the total suspended sediment transport in a rip current. The new results presented here show that rip currents make an important contribution to offshore directed sediment transport. The magnitudes of transport indicate that future improvements to morphology change models should include rip driven offshore sediment transport.
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Lobera, Galán Gemma. "Eco-geomorphological dynamics in contrasting Mediterranean rivers with different degrees of flow regulation." Doctoral thesis, Universitat de Lleida, 2017. http://hdl.handle.net/10803/401455.

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Aquesta tesi analitza l’efecte de les preses sobre el règim de cabals, el transport de sediments, la mobilitat de la llera, i la comunitat de macroinvertebrats en rius Mediterranis de la Península Ibèrica a diferents escales espacio-temporals. A gran escala espacio-temporal, els resultats mostren que la regulació modifica el règim de cabals reduint la magnitud i la freqüència de les crescudes. Aquest fet, juntament amb la disminució de l’aportació de sediments des d’aigües amunt, produeix una pèrdua de barres sedimentaries que són ocupades per la vegetació causant una ràpida estabilització la llera, limitant el dinamisme del riu i pot contribuir a la degradació de l’ecosistema fluvial. A petita escala (els rius Ésera i Siurana) es comprova que els embassaments retenen fins el 90% de la càrrega de sediment en suspensió, però l’aportació hídrica només es redueix en el cas de l’Ésera. En els trams d’aigües amunt, les partícules de la llera són mobilitzades de forma freqüent i s’observen canvis morfològics després de cada crescuda, mentre que els trams d'aigües avall es mantenen estables. En el cas del Siurana aquests canvis causen diferències notables en la composició taxonòmica dels macroinvertebrats, encara que la riquesa d’espècies es manté intacte. La densitat i la biomassa augmenten aigües avall però la biodiversitat disminueix. La tesi descriu i quantifica canvis en l’estructura bio-física i el funcionament de l’ecosistema fluvial en rius Mediterranis regulats i proporciona informació inèdita fins ara en el camp de la Eco-Geomorfologia.<br>Esta tesis analiza el efecto de las presas sobre el régimen de caudales, el transporte de sedimentos, la morfología y la movilidad del cauce, y la comunidad de macroinvertebrados en ríos Mediterráneos de la Península Ibérica a diferentes escalas espacio-temporales. A gran escala espacio-temporal, los resultados muestran una reducción generalizada de la magnitud y la frecuencia de las crecidas que, juntamente con la reducción del suministro de sedimentos, produce una pérdida de barras que son ocupadas por la vegetación, hecho que estabiliza el cauce fluvial, limitando el dinamismo del lecho del río y puede contribuir a la degradación del ecosistema fluvial. En pequeña escala (los ríos Ésera y Siurana) se comprueba que los embalses retienen hasta el 90% de la carga de sedimentos en suspensión, aunque la aportación hídrica solo se reduce en Ésera. En los tramos de aguas arriba, las partículas del lecho son movilizadas frecuentemente y se observan cambios morfológicos después de cada crecida, mientras que los tramos de aguas abajo se mantienen estables. En el Siurana, estos cambios provocan diferencias significativas en la composición taxonómica de los macroinvertebrados en el Siurana, aunque la riqueza de especies se mantiene prácticamente intacta. Por otro lado, la densidad y la biomasa aumentan aguas abajo pero la biodiversidad disminuye. La tesis describe y cuantifica cambios en la estructura bio-física y el funcionamiento del ecosistema fluvial en ríos Mediterráneos regulados y proporciona información inédita en el campo de la Eco-Geomorfología.<br>The effects of dams on river flow regimes, sediment transport, channel morphology, bed mobility and macroinvertebrate communities were studied in Mediterranean rivers of the Iberian Peninsula at multiple temporal and spatial scales. At the large spatio-temporal scales, results show that regulation changes their flow regimes, with a generalized reduction in flood magnitude and frequency. This, in addition to the decrease in downstream sediment supply, results in the loss of active bars as they are encroached by vegetation (channel stabilization). Geomorphic stabilization limits riverchannel dynamics and may contribute to the environmental degradation of the fluvial ecosystem. At the small scale (the Ésera and the Siurana rivers), the reservoirs trap up to 90% of the suspended load, although total runoff is only reduced in the Ésera. In the upstream reaches, riverbed material is frequently entrained and morphological changes were observed following floods, while the downstream reaches were stables. In the Siurana, damming causes significant differences in taxonomic composition of the benthic invertebrate communities, but the species richness remained almost the same. Density and biomass increase notably below the dam although diversity decreases. The thesis describes and quantifies changes on the bio-physical structure and functioning of the fluvial ecosystem in dammed Mediterranean rivers and provides comprehensive insights in the field of the Eco-Geomorphology.
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Smyth, Thomas Andrew George. "Airflow and sediment transport dynamics in coastal dune blowouts." Thesis, Ulster University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.646398.

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Blowouts are erosional depressions that occur on pre-existing vegetated sand deposits. Their morphodynamic behaviour can reflect changes in anthropogenic activity, climatic conditions and animal behaviour; however patterns of deflation are poorly understood as near-surface airflow is complex. Previous research has indicated that flow is topographically manipulated as it moves through the landform, causing steering, reversal and jetting of the airflow. However, empirical data on these effects have been limited due to inadequacies in anemometer and sediment trap deployments. As a consequence knowledge of flow behaviour inside blowouts is limited to crude conceptual approaches. This study used ultrasonic three-dimensional anemometry (50 Hz) to validate a three dimensional computational fluid dynamics (CFD) model. This enabled a detailed description and explanation of near surface wind flow within a bowl blowout from a variety of wind direction and wind speeds up to hurricane force. Three-dimensional anemometry complemented by a CFD simulation was used to quantify wind conditions, whilst high resolution (25 Hz) electronic load cell traps and saltation impact responders, measured sediment transport within a trough blowout. The results demonstrate that considerable flow streamline compression, expansion, steering and reversal occur within trough and saucer blowouts. Airflow within blowouts alters with incident wind direction but does not change structurally with wind speed. Sediment transport flux and intermittency vary considerably within the landform, whilst the best correlation between wind flow and sediment transport varies between wind speed and turbulent kinetic energy (TKE). Where wind speed correlates best with TKE, the optimum averaging interval is much lower than those locations which correlate best with wind speed.
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O'Neil, Sean. "THREE DIMENSIONAL MOBILE BED DYNAMICS FOR SEDIMENT TRANSPORT MODELING." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1032548958.

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Best, James Leonard. "Flow dynamics and sediment transport at river channel confluences." Thesis, Birkbeck (University of London), 1985. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284141.

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Chilmakui, Chandra Sekhar. "Sediment Transport and Pathogen Indicator Modeling in Lake Pontchartrain." ScholarWorks@UNO, 2006. http://scholarworks.uno.edu/td/326.

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A nested three dimensional numerical modeling application was developed to determine the fate of pathogen indicators in Lake Pontchartrain discharged from its tributaries. To accomplish this, Estuarine, coastal and ocean model with sediment (ECOMSED) was implemented to simulate various processes that would determine the fate and transport of fecal coliform bacteria in the lake. The processes included hydrodynamics, waves, sediment transport, and the decay and transport of the fecal coliforms. Wind and tidal effects were accounted along with the freshwater inflows. All the components of the modeling application were calibrated and validated using measured data sets. Field measurements of the conventional water quality parameters and fecal coliform levels were used to calibrate and validate the pathogen indicator transport. The decay of the fecal coliforms was based on the literature and laboratory tests. The sediment transport module was calibrated based on the satellite reflectance data in the lake. The north shore near-field model indicated that the fecal coliform plume can be highly dynamic and sporadic depending on the wind and tide conditions. It also showed that the period of impact due to a storm event on the fecal coliform levels in the lake can be anywhere from 1.5 days for a typical summer event to 4 days for an extreme winter event. The model studies showed that the zone of impact of the stormwater from the river was limited to a few hundred meters from the river mouth. Finally, the modeling framework developed for the north shore was successfully applied to the south shore of Lake Pontchartrain to simulate fate and transport of fecal coliforms discharged through the urban stormwater outfalls.
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Dingle, Elizabeth Harriet. "River dynamics in the Himalayan foreland basin." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31285.

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Rivers sourced in the Himalayan mountains support more than 10% of the global population, where the majority of these people live downstream of the mountain front on the alluvial Indo-Gangetic Plain. Many of these rivers however, are also the source of devastating floods. The tendency of these rivers to flood is directly related to their large-scale morphology. In general, rivers that drain the east Indo-Gangetic Plain have channels that are perched at a higher elevation relative to their floodplain, leading to more frequent channel avulsion and flooding. In contrast, those further west have channels that are incised into the floodplain and are historically less prone to flooding. Understanding the controls on these contrasting river forms is fundamental to determining the sensitivity of these systems to projected climate change and the growing water resource demands across the Plain. This thesis examines controls on river morphology across the central portion of the Indo-Gangetic Plain drained by the Ganga River (the Ganga Plain). Specifically, the relative roles of basin subsidence, sediment grain size and sediment flux have been explored in the context of large-scale alluvial river morphology over a range of timescales. Furthermore, this thesis has developed and tested techniques that can be utilised to help quantify these variables at catchment-wide scales. This analysis has been achieved through combining new sediment grain size, pebble lithology and cosmogenic radionuclide data with quantitative topographic and sedimentological analysis of the Ganga Plain. In the first part of this thesis, I examine the contrast in channel morphology between the east and west Ganga Plain. Using topographic analysis, basin subsidence rates and sediment grain size data, I propose that higher subsidence rates in the east Ganga Plain are responsible for a deeper basin, with perched low-gradient rivers systems that are relatively insensitive to climatically driven changes in base-level. In contrast, lower basin subsidence rates in the west are associated with a shallower basin with entrenched river systems that are capable of recording climatically induced lowering of river base-level during the Holocene. Through an analysis of fan geometry, sediment grain size and lithology, I then demonstrate that gravel flux from rivers draining the central Himalaya with contributing areas spanning three orders of magnitude is approximately constant. I show that the abrasion of gravel during fluvial transport can explain this observation, where gravel sourced from more than 100 km upstream is converted into sand by the time it reaches the Plain. I attribute the over-representation of quartzitic pebble lithologies in the Plain (relative to the proportion of the upstream catchment area likely to contribute quartzite pebbles) to the selective abrasion of weaker lithologies during transport in the mountainous catchment. This process places an upper limit on the amount of coarse sediment exported into the Indo-Gangetic Plain. Finally, I consider the use of cosmogenic 10Be derived erosion rates as a method to generate sediment flux estimates over timescales of 102-104 years. Cosmogenic radionuclide samples from modern channel and independently dated Holocene terrace and flood deposits in the Ganga River reveal a degree of natural variability in 10Be concentrations close to the mountain front. This is explored using a numerical analysis of processes which are likely to drive variability in catchment-averaged 10Be concentrations. I propose that the observed variability is explained by the nature of stochastic inputs of sediment (e.g. the dominant erosional process, surface production rates, depth of landsliding, degree of mixing), and secondly, by the evacuation timescales of individual sediment deposits which buffers their impact on catchment-averaged concentrations. In landscapes dominated by high topographic relief, spatially variable climate and multiple geomorphic process domains, the use of 10Be concentrations to generate sediment flux estimates may not be truly representative. The analysis presented here suggests that comparable mean catchment-averaged 10Be concentrations can be derived through different erosional processes. For a given 10Be concentration, volumetric sediment flux estimates may therefore differ.
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Books on the topic "Sediment Transport Dynamics"

1

Fuat, Şentürk, ed. Sediment transport technology: Water and sediment dynamics. Water Resources Publications, 1992.

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IAHS International Commission on Continental Erosion. Symposium. Sediment dynamics in changing environments. IAHS Press, 2008.

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IAHS International Commission on Continental Erosion. Symposium. Sediment dynamics in changing environments. IAHS Press, 2008.

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IAHS International Commission on Continental Erosion. Symposium. Sediment dynamics in changing environments. IAHS Press, 2008.

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Şentürk, Fuat. Sediment transport technology: Water and sediment dynamics : solutions manual. Water Resources Publications, 1992.

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Macdonald, Anne. Sediment dynamics in type 4 and 5 waters: A review and synthesis. PTI Environmental Services, 1989.

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Environmental and Water Resources Institute (U.S.). Task Committee on Sediment Dynamics Post-Dam Removal, ed. Sediment dynamics upon dam removal. American Society of Civil Engineers, 2011.

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Wu, Weiming. Computational river dynamics. Taylor & Francis, 2008.

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Bull, Louise Johanne. Dynamics of fluvial suspended sediment transport and river bank sediment supply. University of Birmingham, 1996.

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Workshop, on Cohesive Sediment Dynamics with Special Reference to Physical Processes in Estuaries (1984 Tampa Fla ). Estuarine cohesive sediment dynamics: Proceedings of a workshop on cohesive sediment dynamics with special reference to physical processes in estuaries, Tampa, Florida, November 12-14, 1984. Springer-Verlag, 1986.

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Book chapters on the topic "Sediment Transport Dynamics"

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Wu, Weiming. "Cohesive Sediment Transport." In Sediment Transport Dynamics. CRC Press, 2023. http://dx.doi.org/10.1201/9781003343165-10.

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Wu, Weiming. "Coastal Sediment Transport." In Sediment Transport Dynamics. CRC Press, 2023. http://dx.doi.org/10.1201/9781003343165-13.

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Wu, Weiming. "Bed-Load Transport." In Sediment Transport Dynamics. CRC Press, 2023. http://dx.doi.org/10.1201/9781003343165-7.

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Wu, Weiming. "Suspended-Load Transport." In Sediment Transport Dynamics. CRC Press, 2023. http://dx.doi.org/10.1201/9781003343165-8.

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Wu, Weiming. "Total-Load Transport." In Sediment Transport Dynamics. CRC Press, 2023. http://dx.doi.org/10.1201/9781003343165-9.

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Wu, Weiming. "Open Channel Flows." In Sediment Transport Dynamics. CRC Press, 2023. http://dx.doi.org/10.1201/9781003343165-3.

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Wu, Weiming. "Physical Modeling and Similitude." In Sediment Transport Dynamics. CRC Press, 2023. http://dx.doi.org/10.1201/9781003343165-15.

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Wu, Weiming. "Introduction." In Sediment Transport Dynamics. CRC Press, 2023. http://dx.doi.org/10.1201/9781003343165-1.

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Wu, Weiming. "Incipient Motion of Sediments." In Sediment Transport Dynamics. CRC Press, 2023. http://dx.doi.org/10.1201/9781003343165-5.

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Wu, Weiming. "Bed Forms." In Sediment Transport Dynamics. CRC Press, 2023. http://dx.doi.org/10.1201/9781003343165-6.

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Conference papers on the topic "Sediment Transport Dynamics"

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Peters, Karsten, Jürgen Newe, and Hocine Oumeraci. "Characterization of Sediment Transport." In Fourth Conference on Coastal Dynamics. American Society of Civil Engineers, 2001. http://dx.doi.org/10.1061/40566(260)30.

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Montreuil, Stephane, and Bernard Long. "132. BEDLOAD SEDIMENT TRANSPORT BUDGET USING CT-SCANNING." In Coastal Dynamics 2009 - Impacts of Human Activities on Dynamic Coastal Processes. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789814282475_0131.

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Uittenbogaard, Rob, and Gert Klopman. "Numerical Simulation of Wave-Current Driven Sediment Transport." In Fourth Conference on Coastal Dynamics. American Society of Civil Engineers, 2001. http://dx.doi.org/10.1061/40566(260)58.

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Dette, Hans H. "Influence of Shoreline Alignment on Offshore Sediment Transport." In Fourth Conference on Coastal Dynamics. American Society of Civil Engineers, 2001. http://dx.doi.org/10.1061/40566(260)96.

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Yoshii, Takumi, Masaaki Ikeno, and Masafumi Matsuyama. "32. EXPERIMENTAL STUDY OF SEDIMENT TRANSPORT CAUSED BY TSUNAMI." In Coastal Dynamics 2009 - Impacts of Human Activities on Dynamic Coastal Processes. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789814282475_0035.

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Alsina, José M., Tom E. Baldock, Michael G. Hughes, Felicia Weir, and Joan P. Sierra. "Sediment Transport Numerical Modelling in the Swash Zone." In Fifth International Conference on Coastal Dynamics. American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40855(214)105.

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Kizhisseri, Abdulla Sharief, David Simmonds, Yaqub Rafiq, and Martin Borthwick. "An Evolutionary Computation Approach to Sediment Transport Modelling." In Fifth International Conference on Coastal Dynamics. American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40855(214)81.

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Sherwood, Christopher R., Guy Gelfenbaum, Peter A. Howd, and Margaret L. Palmsten. "Sediment Transport on a High-Energy Ebb-Tidal Delta." In Fourth Conference on Coastal Dynamics. American Society of Civil Engineers, 2001. http://dx.doi.org/10.1061/40566(260)48.

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Hsu, Tian-Jian, James T. Jenkins, and Philip L. F. Liu. "Modeling of Sediment Transport—A Two-Phase Flow Approach." In Fourth Conference on Coastal Dynamics. American Society of Civil Engineers, 2001. http://dx.doi.org/10.1061/40566(260)59.

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Pan, Shunqi, Yongping Chen, Yanliang Du, Sam Reed, and Judith Wolf. "66. MODELLING OF SEDIMENT TRANSPORT AT EXE ESTUARY, DEVON, UK." In Coastal Dynamics 2009 - Impacts of Human Activities on Dynamic Coastal Processes. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789814282475_0068.

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Reports on the topic "Sediment Transport Dynamics"

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Grace, Matthew D., Phi Hung X. Thanh, and Scott Carlton James. Sandia National Laboratories environmental fluid dynamics code : sediment transport user manual. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/949841.

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Schmidt, Mark. Dynamics and variability of POC burial in depocenters of the North Sea (Skagerrak), Cruise No. AL561, 2.08.2021 – 13.08.2021, Kiel – Kiel, APOC. GEOMAR Helmholtz Centre for Ocean Research Kiel, 2021. http://dx.doi.org/10.3289/cr_al561.

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The AL561 cruise was conducted in the framework of the project APOC (“Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea”). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 Lander and 4 CTD stations were successfully conducted during the AL561 cruise. - (Alkor-Berichte ; AL561)
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Gerald, Terry. Linking the SEDLZJ portable standalone library to the CMS coastal hydrodynamic model. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/47646.

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This document describes the repackaging and linkage of the Sandia National Laboratories Environmental Fluid Dynamics Sediment Processes Code (SNL-EFDC-SEDZLJ), (Thanh et al. 2008). It was originally incorporated within a modified version of the US Environmental Protection Agency’s (USEPA) EFDC public-domain surface-water flow, sediment transport, and water-quality model developed by John Hamrick (Hamrick 1992) and its linkage to the ERDC-CHL-CMS hydrodynamic model. SNL-EFDC simulates flow and transport of sediment as bedload and suspended load. SNL-EFDC-SEDZLJ improves EFDC with updated sediment kinetics subroutines. Sediment erosion is calculated using data collected with a Sediment Erosion at Depth flume (SEDflume). SEDflume measures erosion rates as a function of shear stress and depth from relatively undisturbed cores taken directly from the sediment bed below the water body of interest. The use of SEDflume data provides more accurate sediment erosion rates that are directly input to the model.
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Gardner, T. W., and A. C. Miller. Surface hydrology, sediment transport dynamics, and remote sensing of disturbed watersheds in a humid temperature region. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/6389923.

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Kineke, Gail C. Sediment Dispersal in the Gulf of Lions: Water Column Dynamics and Potential for Cross-Margin Transport. Defense Technical Information Center, 2004. http://dx.doi.org/10.21236/ada612936.

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Kineke, Gail C. Sediment Dispersal in the Gulf of Lions: Water Column Dynamics and Potential for Cross-Margin Transport. Defense Technical Information Center, 2006. http://dx.doi.org/10.21236/ada522859.

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Kineke, Gail C. Sediment Dispersal in the Gulf of Lions: Water Column Dynamics and Potential for Cross-Margin Transport. Defense Technical Information Center, 2005. http://dx.doi.org/10.21236/ada572613.

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Wright, L. D., S. C. Kim, and C. T. Friedrichs. Field Measurement of Bottom-boundary-layer and Sediment-transport Processes in Support of the Strataform Shelf Dynamics and Plume Studies. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada628921.

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Wiggert, Jerry, Brandy Armstrong, Mustafa Kemal Cambazoglu, and K. K. Sandeep. Mid-Breton Sediment Diversion (MBrSD) Assessment – Final Report. The University of Southern Mississippi, 2022. http://dx.doi.org/10.18785/sose.001.

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The purpose of this project is to provide managers at the Mississippi Department of Marine Resources (MDMR) with the scientific information needed to accurately address public concerns regarding the potential effects of the Louisiana Coastal Master Plan / Coastal Protection and Restoration Authority (CPRA) Mid-Breton Sediment Diversion (MBrSD) on the jurisdictional waters and resources of Mississippi. The stated design purpose of the MBrSD is to reconnect and re-establish the deltaic sediment deposition process between the Mississippi River and the Breton Sound Basin through a diversion that will deliver up to 75,000 cfs of sediment-laden freshwater. The report presented herein provides model-based guidance on the impact that the introduction of the MBrSD will have on salinity conditions in the Mississippi Sound (MSS) and Mississippi's jurisdictional waters that encompass oyster reef locations. Oysters are key ecosystem health indicators and economic drivers for the State of Mississippi and freshwater diversions into the western MS Sound (WMSS) have recently led to significant, unprecedented environmental impacts resulting in oyster mortality. The potential addition of a new pathway for additional freshwater to be introduced into the MSS requires careful assessment of the potential impacts that may be incurred. This project is designed to assess the impact of implementing the MBrSD on the physical environment in the WMSS. The primary aim is to understand the connectivity between MBrSD-derived freshwater input to Breton Sound on the environmental conditions impacting the oyster reefs of the WMSS near Bay St. Louis. A physical ocean modeling system based on the Coupled Ocean Atmosphere Wave Sediment Transport (COAWST) has been used to simulate the circulation and dynamics over the entire MSS with the analysis presented herein focusing particularly on the western to central MSS. This project demonstrates the importance of applying modeling-based scientific research and the capability of physical ocean circulation models for assessing aquatic ecosystem health, particularly in key oyster reef areas.
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Messina, Francesca, Ioannis Georgiou, Melissa Baustian, et al. Real-time forecasting model development work plan. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/47599.

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The objective of the Lowermost Mississippi River Management Program is to move the nation toward more holistic management of the lower reaches of the Mississippi River through the development and use of a science-based decision-making framework. There has been substantial investment in the last decade to develop multidimensional numerical models to evaluate the Lowermost Mississippi River (LMMR) hydrodynamics, sediment transport, and salinity dynamics. The focus of this work plan is to leverage the existing scientific knowledge and models to improve holistic management of the LMMR. Specifically, this work plan proposes the development of a real-time forecasting (RTF) system for water, sediment, and selected nutrients in the LMMR. The RTF system will help inform and guide the decision-making process for operating flood-control and sediment-diversion structures. This work plan describes the primary components of the RTF system and their interactions. The work plan includes descriptions of the existing tools and numerical models that could be leveraged to develop this system together with a brief inventory of existing real-time data that could be used to validate the RTF system. A description of the tasks that would be required to develop and set up the RTF system is included together with an associated timeline.
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