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Controls on sediment delivery in coastal plain rivers

Author:
Slattery, Michael C., Phillips, Jonathan D.
Source:
Journal of environmental management 2011 v.92 no.2 pp. 284-289
ISSN:
0301-4797
Subject:
coastal plains, coasts, conveyors, estuaries, pollution load, rivers, sediment yield, sediments, streams, Texas
Abstract:
Rivers crossing coastal plains are often inefficient conveyors of sediment, so that changes in upstream sediment dynamics are not evident at the river mouth. Extensive accommodation space and low stream power often result in extensive alluvial storage upstream of estuaries and correspondingly low sediment loads at the river mouth. However, gaging stations with sediment records are typically well upstream of the coast, and thus tend to overestimate sediment yields by under-representing the lower coastal plain and because there is often a net loss of sediment in lower coastal plain reaches. Studies of alluvial sediment storage have generally focused on accommodation space, but, using examples from Texas, we show that low transport capacity controlled largely by slope is a crucial factor.
Agid:
423774