Sediment Sources, Transport and Delivery to an Alluvial Fan, Caliente Creek, California

by M. D. Harvey, Water Engineering and Technology, Inc., Fort Collins, United States,
E. F. Sing, Water Engineering and Technology, Inc., Fort Collins, United States,
R. C. MacArthur, Water Engineering and Technology, Inc., Fort Collins, United States,



Document Type: Proceeding Paper

Part of: Hydraulics/Hydrology of Arid Lands (H?AL)

Abstract:

Sediment delivery to a proposed flood detention reservoir site in the medial region of the Caliente Creek alluvial fan is dependant on the magnitude and duration of flood flows. Because the flows in the basin are ephemeral estimates of annual sediment delivery rates are somewhat meaningless. However, stratigraphic evidence showed that a 50- year recurrence interval flood in 1983 deposited an average of 9 inches of sediment on the fan surface upstream of the dam site. An incised channel exposure on the fan indicated that previous floods had deposited similar depths of sediment. Sediment deposited on the valley floors upstream of the fan during lower magnitude and higher frequency events are the primary source of sediment transported during flood flows.

Subject Headings: Sediment | Sediment transport | Rivers and streams | Floods | Alluvial channels | Flood frequency | Reservoirs | California | United States

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