Gas Transfer Measurements at Hydraulic Structures on the Ohio River
UNIVERSITY OF MINNESOTA ST. ANTHONY FALLS LABORATORY Engineering, Environmental and Geophysical Fluid Dynamics Project Report No. 414 Gas Transfer Measurements at Hydraulic f': Structures on the Ohio River : 1 by Suresh L. Hettiarachchi, Jolm S. Gulliver, David E Hibbs st. Anthony Falls Laboratory, Department of Civil Engineering, University of Minnesota Minneapolis, Minnesota. John Howe, Summit Envirosolutions, Minneapolis, Minnesota Kimberly F Miller, U.S. Geological Survey, Charleston, West Virginia George P. Kincaid, U.S. Army Corps of Engineers, Hungtington, West Virginia Prepared for U. S. ARMY CORPS OF ENGINEERS Hungtington District Huntington, West Virginia r .I I i '-- j Contract No. DAlDACW69~96~P~1410 June1998 I ~ I Minneapolis, Minnesota \ ), The University of Minnesota is committed to the policy that all persons shall have equal access to its programs, facilities, and employment without regard to race, religion, color, sex, national origin, handicap, age or veteran status. Prepared for: Metropolitan Council Last Revised: 6/30/98 Disk Locators: Ohio\PR414txt.doc; PR414COV.doc (Zip Disk #lO/Figures) ABSTRACT Gas transfer at hydraulic structures has been a topic of interest for many years. Navigation dams on rivers can add a large amount of atmospheric gases to the water due to the high velocities and the turbulence generated as the water passes through these structures. The increase in air~water gas transfer is due to air entrainment and the formation of bubbles in the flow. Hence, gas transfer at hydraulic structures plays an important role in the water quality of a river~reservoir system. Measurement of air~water gas transfer at hydraulic structures is a complicated process.
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