TRANSPORT OF ROAD-SURFACE SEDIMENT THROUGH EPHEMERAL STREAM CHANNELS

Autor:	S. H. Duncan, J. W. Ward, John T. Heffner, Robert E. Bilby
Rok vydání:	1987
Předmět:	Hydrology Ecology Ephemeral key Environmental science Sediment Biota STREAMS Particle size Drainage Debris Earth-Surface Processes Water Science and Technology Stream capacity
Zdroj:	Journal of the American Water Resources Association. 23:113-119
ISSN:	1752-1688 1093-474X
DOI:	10.1111/j.1752-1688.1987.tb00789.x
Popis:	Since the majority of road drainage points in western Washington and Oregon enter small, often ephemeral streams rather than large, fish-bearing waters, impact of road-surface sediment on biota in permanent streams depends, to a large extent, on transport through these small watercourses. A series of experimental additions of road-surface sediment was made to two ephemeral streams to examine the downstream transport of this material as a function of discharge and channel characteristics. These small streams were found to store large amounts of sediment washed from road surface. In no instance did either stream transport more than 45 percent of the added material to their mouths, distances of 95 and 125 m. Larger-sized sediment particles were delivered at a lower rate than finer material. Added sediment
Databáze:	OpenAIRE
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