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Lookup NU author(s): Dr James Bathurst
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SHESED is introduced as a physically based, spatially distributed erosion and sediment yield component for the existing SHE hydrological modelling system, for use at the catchment scale. For hillslopes (represented spatially by the SHE grid square network) SHESED simulates soil erosion by raindrop impact, leaf drip and sheet overland flow (without rilling), and the transport of the eroded material by overland flow. For channels the component simulates the erosion of bed material and the downstream transport of this material together with that supplied by overland flow. In the channel sediment routing procedure it is assumed that the flow can carry any available load of fine sediments (less than 0.062 mm in diameter) but for coarser sediments the load is limited by the calculated capacity transport rate of the flow. The channel component also allows for bed armouring. Application of SHESED to rainfall-induced sediment yield events at two agricultural catchments (areas 5.1 and 6.4 ha) in Iowa shows generally good reproduction of the observed temporal variations in sediment yield. Application to a 3.3 km reach of the East Fork River, Wyoming, for a 37 day period shows good reproduction of observed sediment discharge magnitudes but some discrepancy in the timing of the simulated sediment discharge peak. © 1996 - Elsevier Science B.V. All rights reserved.
Author(s): Wicks J, Bathurst JC
Publication type: Article
Publication status: Published
Journal: Journal of Hydrology
Year: 1996
Volume: 175
Issue: 1-4
Pages: 213-238
ISSN (print): 0022-1694
ISSN (electronic):
URL: http://dx.doi.org/10.1016/S0022-1694(96)80012-6
DOI: 10.1016/S0022-1694(96)80012-6
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