Pacific Southwest Research Station

Publication Information

Title: Measuring the fraction of pool volume filled with fine sediment

Author: Hilton, Sue; Lisle, Thomas E.

Date: 1993

Source: Research Note PSW-RN-414. Albany, California: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture. 11 p.

Description: The fraction of pool volume filled with fine sediment (usually fine sand to medium gravel) can be a useful index of the sediment supply and substrate habitat of gravel-bed channels. It can be used to evaluate and monitor channel condition and to detect and evaluate sediment sources. This fraction (V*) is the ratio of fine-sediment volume to pool water volume plus fine-sediment volume. These volumes are computed for the residual portion of the pool that lies below the elevation of the downstream riffle crest. Fine-sediment thickness is measured by driving a graduated metal probe into a fine-grained deposit until the underlying coarser substrate is felt.

Key Words: PSW4351, fine sediment, pools, monitoring, sedimentation, fish habitat

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Hilton, Sue; Lisle, Thomas E.  1993.  Measuring the fraction of pool volume filled with fine sediment  Research Note PSW-RN-414. Albany, California: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture. 11 p..