Measuring dissolved oxygen, temperature, pH, and conductivity profiles in Potomac River. USGS Research Vessel Rockfish. Washington, D.C. circa 1984.
Dates
Date Taken
1984
Summary
Album caption: John D. Powell (left) and Ronald R.H. Cohen (right) measuring dissolved oxygen, temperature, pH, and conductivity profiles in the tidal Potomac River from the USGS Research Vessel Rockfish. The Wilson Bridge is in the background. Washington, D.C. ca. 1984. (Photo by Daniel C. Hahl, Water Resources Division, USGS). Published on page 91 in the U.S. Geological Survey Yearbook, Fiscal Year 1984. 1985.
Summary
Album caption: John D. Powell (left) and Ronald R.H. Cohen (right) measuring dissolved oxygen, temperature, pH, and conductivity profiles in the tidal Potomac River from the USGS Research Vessel Rockfish. The Wilson Bridge is in the background. Washington, D.C. ca. 1984. (Photo by Daniel C. Hahl, Water Resources Division, USGS).
Published on page 91 in the U.S. Geological Survey Yearbook, Fiscal Year 1984. 1985.