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Sources of suspended-sediment flux in streams of the chesapeake bay watershed: A regional application of the sparrow model

Journal of the American Water Resources Association

By:
, , and
DOI: 10.1111/j.1752-1688.2010.00450.x

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Abstract

We describe the sources and transport of fluvial suspended sediment in nontidal streams of the Chesapeake Bay watershed and vicinity. We applied SPAtially Referenced Regressions on Watershed attributes, which spatially correlates estimated mean annual flux of suspended sediment in nontidal streams with sources of suspended sediment and transport factors. According to our model, urban development generates on average the greatest amount of suspended sediment per unit area (3,928 Mg/km2/year), although agriculture is much more widespread and is the greatest overall source of suspended sediment (57 Mg/km2/year). Factors affecting sediment transport from uplands to streams include mean basin slope, reservoirs, physiography, and soil permeability. On average, 59% of upland suspended sediment generated is temporarily stored along large rivers draining the Coastal Plain or in reservoirs throughout the watershed. Applying erosion and sediment controls from agriculture and urban development in areas of the northern Piedmont close to the upper Bay, where the combined effects of watershed characteristics on sediment transport have the greatest influence may be most helpful in mitigating sedimentation in the bay and its tributaries. Stream restoration efforts addressing floodplain and bank stabilization and incision may be more effective in smaller, headwater streams outside of the Coastal Plain. ?? 2010 American Water Resources Association. No claim to original U.S. government works.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Sources of suspended-sediment flux in streams of the chesapeake bay watershed: A regional application of the sparrow model
Series title:
Journal of the American Water Resources Association
DOI:
10.1111/j.1752-1688.2010.00450.x
Volume
46
Issue:
4
Year Published:
2010
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of the American Water Resources Association
First page:
757
Last page:
776
Number of Pages:
20