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United States Environmental Protection Agency
Watershed Assessment of River Stability & Sediment Supply (WARSSS)
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Output: Introduced Hillslope Sediment

Total annual sediment yield (tons/year) from Hillslope Processes

Sediment load and sizes of introduced sediment are required at this step. Sediment delivery relations are used to assess routing of potentially eroded soils to stream systems (conversion of erosion of soil mass to sediment supply).

Sediment Competence, Capacity and Channel Stability Consequence

The user is presented with a methodology for computations of entrainment (sediment competence) and sediment yield (sediment capacity). The potential adverse consequence of increased sediment supply is stream channel instability. These next steps will evaluate this potential based on both sediment competence and capacity. The user may have experience with other models and if the models have been calibrated with observed data representing similar systems for implementation, then these models should be used. The following steps document the analytical sequence.

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