Suspended sediment and discharge relationships to identify bank degradation as a main sediment source on small agricultural catchments

2007 ◽  
Vol 21 (21) ◽  
pp. 2923-2933 ◽  
Author(s):  
J. Lefrançois ◽  
C. Grimaldi ◽  
C. Gascuel-Odoux ◽  
N. Gilliet
Keyword(s):  
Suspended Sediment ◽  
Sediment Source ◽  
Agricultural Catchments

Contrasting suspended sediment export in two small agricultural catchments: Cross-influence of hydrological behaviour and landscape degradation or stream bank management

2018 ◽  
Vol 29 (5) ◽  
pp. 1385-1396 ◽  
Author(s):  
Amphone Vongvixay ◽  
Catherine Grimaldi ◽  
Rémi Dupas ◽  
Ophélie Fovet ◽  
François Birgand ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Agricultural Catchments ◽  
Landscape Degradation ◽  
Bank Management ◽  
Stream Bank ◽  
Sediment Export

scholarly journals Suspended sediment source and propagation during monsoon events across nested sub-catchments with contrasted land uses in Laos

2017 ◽  
Vol 9 ◽  
pp. 69-84 ◽  
Author(s):  
Sylvain Huon ◽  
Olivier Evrard ◽  
Elian Gourdin ◽  
Irène Lefèvre ◽  
Thierry Bariac ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Sediment Source ◽  
Land Uses

Study on the Tidal Current and Suspended Sediment Transport in Taizhou Bay

2012 ◽  
Vol 212-213 ◽  
pp. 55-58
Author(s):  
Jie He ◽  
Xin Sheng Zhao ◽  
Yu Fan Zhu
Keyword(s):  
Sediment Transport ◽  
Numerical Model ◽  
Suspended Sediment ◽  
Tidal Current ◽  
Sediment Concentration ◽  
Suspended Sediment Transport ◽  
Sediment Source ◽  
Sea Floor ◽  
Hydrologic Data ◽  
The Way

Taizhou Bay is an estuary with high tidel range, middle tidal current and low sediment concentration. For the sea floor is very dense, it is stable in the usual water regimen. The numerical model is introduced to simulate the suspended sediment transport in Taizhou Bay. And the recent hydrologic data and the seabed change have been validated by the numerical model. The movement of tidal current and sediment in Dagagn Bay are simulated, and the sediment siltation in port designed is calculated by the model. The results show that the sediment source is from the shoal produced by the ebb current, and the sediment silting is decreased two-thirds by the cofferdam back of the bay, because the way of the suspended sediment is stopped by the cofferdam from the shoal to the harbor.

Improving spatial representation of erosion sources using Sediment Fingerprinting with terrain data and sediment budget modelling

2020 ◽  
Author(s):  
Simon Vale ◽  
Hugh Smith
Keyword(s):  
Suspended Sediment ◽  
Source Apportionment ◽  
End Users ◽  
Sediment Budget ◽  
Storm Event ◽  
Sediment Source ◽  
Sediment Fingerprinting ◽  
Sediment Sources ◽  
Geochemical Tracers ◽  
Source Contributions

<p>Sediment fingerprinting quantifies proportional contributions of catchment sediment sources to downstream sediment mixtures and deposits. While the sediment fingerprinting technique is well established it is still challenged by the coarse spatial resolution of sediment source discrimination which hinders understanding of catchment sediment dynamics and limits its usefulness for land management where finer resolution spatial information is required.</p><p>Here, two conventional sediment fingerprinting datasets from New Zealand are used to show how spatial modelling of source loads can improve 1) the usefulness of sediment fingerprinting approaches and 2) visualization of results for end-users by combining source apportionment with terrain information and sediment budget modelling. The two case studies involve unmixing sediment source contributions to 1) overbank deposits within the Oroua River catchment, where six sediment sources (Mountain Range, Mudstone, Hill Subsurface, Hill Surface, Unconsolidated Sandstone, and Channel Bank) across two size fractions (<63 µm and 125–300 µm) were characterized using bulk geochemical and radionuclide tracers and 2) suspended sediment in the Manawatu catchment, where a similar six sources were characterized using bulk geochemical tracers to determine changes in source contributions to hourly suspended sediment samples during a 53hr storm event.</p><p>The proportional source contributions for each case study are applied to modelled sediment loads and spatially distributed using terrain information for rock type, slope and channel network extent to produce specific sediment yield maps for both catchments and spatial visualization of sediment generation during the Manawatu catchment storm event. Integrating sediment fingerprinting results with spatial datasets and modelling can enhance interpretation of source apportionment results and improve the utility of this information for end-users focused on the spatial targeting of erosion sources for mitigation to reduce downstream sediment impacts.   </p>

Forestry effects on suspended sediment and bedload yields in the Balquhidder catchments, Central Scotland

1987 ◽  
Vol 78 (4) ◽  
pp. 379-384 ◽  
Author(s):  
R. I. Ferguson ◽  
T. A. Stott
Keyword(s):  
Suspended Sediment ◽  
Sediment Yield ◽  
Bank Erosion ◽  
Sediment Source ◽  
Logging Roads

ABSTRACTOutputs of suspended sediment and bedload from the 7·7 km2 moorland Monachyle basin and the 6·8 km2, 40%-forested Kirkton basin near Balquhidder, and inputs from tributary streams and mainstream bank erosion, are compared. Sediment yield is about three times higher in the forested basin and varies more sensitively with streamflow, suggesting greater availability of erodible sediment. The output is predominantly of suspended sediment and is derived mainly from tributary streams. Initial observations following partial moorland ploughing and forest clearfelling in 1986 indicate that erosion of timber loading areas and logging roads is the main sediment source.

scholarly journals Water and sediment fluxes in Mediterranean mountainous regions: comprehensive dataset for hydro-sedimentological analyses and modelling in a mesoscale catchment (River Isábena, NE Spain)

2018 ◽  
Vol 10 (2) ◽  
pp. 1063-1075 ◽  
Author(s):  
Till Francke ◽  
Saskia Foerster ◽  
Arlena Brosinsky ◽  
Erik Sommerer ◽  
Jose A. Lopez-Tarazon ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Meteorological Data ◽  
Sediment Source ◽  
Discharge Data ◽  
Sediment Yields ◽  
Sediment Fluxes ◽  
Mountainous Regions ◽  
Water And Sediment ◽  
Ne Spain ◽  
River Isábena

Abstract. A comprehensive hydro-sedimentological dataset for the Isábena catchment, northeastern (NE) Spain, for the period 2010–2018 is presented to analyse water and sediment fluxes in a Mediterranean mesoscale catchment. The dataset includes rainfall data from 12 rain gauges distributed within the study area complemented by meteorological data of 12 official meteo-stations. It comprises discharge data derived from water stage measurements as well as suspended sediment concentrations (SSCs) at six gauging stations of the River Isábena and its sub-catchments. Soil spectroscopic data from 351 suspended sediment samples and 152 soil samples were collected to characterize sediment source regions and sediment properties via fingerprinting analyses. The Isábena catchment (445 km2) is located in the southern central Pyrenees ranging from 450 m to 2720 m a.s.l.; together with a pronounced topography, this leads to distinct temperature and precipitation gradients. The River Isábena shows marked discharge variations and high sediment yields causing severe siltation problems in the downstream Barasona Reservoir. The main sediment source is badland areas located on Eocene marls that are well connected to the river network. The dataset features a comprehensive set of variables in a high spatial and temporal resolution suitable for the advanced process understanding of water and sediment fluxes, their origin and connectivity and sediment budgeting and for the evaluation and further development of hydro-sedimentological models in Mediterranean mesoscale mountainous catchments. The dataset is available at http://doi.org/10.5880/fidgeo.2018.011.

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