SYNOPSISLake Bloomington, an impounding reservoir, has beensubjected to detailed surveys in 1948, 1952 and 1955 to determine the deposition of sediment. During each of these surveys samples of the sediment were obtained. Particle size distribution analyses of 30 of these sediment samples were utilized to determine the tons of sediment deposited in the lake during each of these sedimentation periods. Postulating that sediment particles which had a diameter greater than 50 microns had been moved into the lake as bed material load, the total tons of this sized material was calculated based on the sediment samples.An hydraulic study was made of the 2-1/2 mile reach of Money Creek immediately upstream from Lake Bloomington to determine its sediment-carrying capacity. A series of sediment samples were taken of the bed material of the Money Creek channel. Utilizing these data, curves of water discharge versus sediment discharge were computed utilizing three different methods: the Einstein procedure, the Schoklitsch formula, and the DuBoys formula.At the lower end of this stream reach, immediately upstream from Lake Bloomington is a stream-gaging station for which flow records were available for each of the three sedimentation periods. Utilizing flow duration information from this stream gage, the total quantity of bed material moved through the Money Creek reach was calculated utilizing each of the three sediment transport relationships developed. The actual bed material-size sediment in Lake Bloomington is compared with the sediment transport as computed by the three methods.

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