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Velocity mapping in the tailwater of Barkley Dam (Cumberland River) near Grand Rivers, Kentucky, November 9–10, 2021

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 04:58 AM | Dataset Last Updated: November 19, 2025 at 12:00 AM
Water velocities were measured at discrete cross-sections along an approximately 0.8-mile reach of the Barkley Dam tailwater on November 9-10, 2021, using a 1200 kHz acoustic Doppler current profiler (ADCP). The data were geo-referenced with an integrated global navigation satellite system (GNSS) smart antenna with submeter accuracy. The ADCP and GNSS antenna were mounted on a marine survey vessel, and data were collected as the survey vessel traversed the tailwater along planned survey lines. There was typically one reciprocal pair (two passes) of data collected per line. There was a total of 40 survey lines equally spaced 100 feet apart and oriented approximately perpendicular to the primary flow direction. Data collection software integrated and stored the velocity and position data from the ADCP and GNSS antenna in real time. Data were processed to derive temporally- and spatially-averaged water velocity values. These velocity measurements were collected during two different steady discharge conditions from the hydropower turbines at Barkley Dam. The average rated discharges on November 9 and 10 were 44,000 cubic feet per second (cfs) and 19,000 cfs, respectively. These data were collected to understand flow patterns in the Barkley Dam tailwater during different discharge conditions from the hydropower turbines at Barkley Dam and may be used to assist in invasive carp capture and control programs.

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