Compartmented Sediment Trap

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Abstract
A method for measuring sediment transport is presented. The measurement device is a portable, compartmented, bottom trap that is operated by burying the trap in the stream bed, waiting until the natural bedforms are reestablished, and then opening the trap during a time interval sufficient to collect a large number of moving particles. The sections of the trap allow the calculation of the fractions of the sediment that jump various lengths as they move along the bed. The jump-length distribution permits the direct calculation of the efficiency of the trap for the various grain sizes of the moving sediment. The compartmented trap was field tested in a sand-bottomed creek. The test data indicated that the trap worked well.

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