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An Integrated Process-Based Approach to Regional Sediment Issues Using Geomorphic and Numerical-Modeling Analyses

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  701P0904,  . (doi: 10.13031/2013.17363)
Authors:   Andrew Simon, Robert Wells, Eddy Langendoen, and Ron Bingner
Keywords:   

Sediment is listed as one of the principle pollutants of surface waters in the United States, both in terms of sediment quantity (clean sediment) and sediment quality due to adsorbed constituents. Sediment-transport rates and bed-material conditions can be interpreted as (1) natural or background, resulting from generally stable channel systems, (2) impacted, with greater transport rates and amounts, reflecting a disturbance of some magnitude and more pervasive erosion, and (3) impaired, where erosion and sediment transport rates and amounts are so great (or in a some cases so low) that biologic communities and other designated stream uses are adversely effected. Impairment of designated stream uses by clean sediment (neglecting adsorbed constituents) may occur through processes that occur on the channel bed or by processes that take place in the water column. To identify those sediment-transport conditions that represent impacted conditions it is critical to first be able to define the non-disturbed, stable, or reference condition for the particular waterbody.

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