In-Situ Monitoring of Suspended Sediments: Development of a Densimetric Monitoring Instrument
Calhoun, Daniel L.
Rasmussen, Todd C.
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We present a new technique for continuously monitoring total suspended solids concentrations. Our approach is to use a differential pressure sensor to measure the fluid density within the water column. The fluid density is directly affected by the concentration of suspended solids, thus allowing us to infer the sediment concentration. Ten demonstration sites on the Broad River in northeast Georgia have been selected for comparing the densimetric technique with turbidity, grab samples, and integrated samples. Variations in sediment concentrations with stage, velocity, and temperature will be evaluated.