CONTINUOUS AUTOMATED SENSING OF STREAMFLOW DENSITY AS A SURROGATE FOR SUSPENDED-SEDIMENT CONCENTRATION SAMPLING

Larsen, M. C., Alamo, C. F., Gray, J. R., and Fletcher, W. (2001).
„Continuous automated sensing of streamflow density as a
surrogate for suspended-sediment concentration sampling.‰
Proceedings of the 7th Federal Interagency Sedimentation
Conference, March 25–29, 2001, Reno, Nevada, Vol. I, pp. III-
102–III-109.

Abstract: 
A newly refined technique for continuously and automatically sensing the density of a water-sediment mixture is being tested at a U.S. Geological Survey streamflow-gaging station in Puerto Rico. Originally developed to measure crude oil density, the double bubbler instrument measures fluid density by means of pressure transducers at two elevations in a vertical water column. By subtracting the density of water from the value measured for the density of the water-sediment mixture, the concentration of suspended sediment can be estimated. Preliminary tests of the double bubbler instrument show promise but are not yet conclusive.