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Investigating Technologies To Monitor Open-channel Discharge By Direct Measurement Of Cross-Sectional Area And Velocity Of Flow

N.B. Melcher, R.T. Cheng, and F.P. Haeni
U.S. Geological Survey

Abstract

The U.S. Geological Survey is investigating technologies that may enable the direct, continuous, noncontact measurement of open-channel discharge. Measurement of open-channel discharge could be achieved by monitoring bottom and surface elevation and flow velocity of open channels. These parameters have been individually measured using particle-image velocimetry, lasers, radar, and acoustics in related applications. The U.S. Geological Survey is planning research to analyze and refine the use of these technologies for direct measurement of open-channel discharge. Direct measurement of discharge may reduce streamflow-gaging costs, improve accuracy, and reduce hazards associated with the traditional streamflow-gaging methods.

Citation: Melcher, N.B., Cheng, R.T., and Haeni, F.P., 1999, Investigating technologies to monitor open-channel discharge by direct measurement of cross-sectional area and velocity of flow, in Hydraulic Engineering for Sustainable Water Resources Management at the Turn of the Millennium: Graz, Austria, Technical University Graz, Institute for Hydraulic and Hydrology XXVIII International Association of Hydraulic Research Congress, August, 22-27, 1999, Paper No. 181, 6 p.