TY - JOUR
T1 - Reaeration measurements using a methane tracer at six dams in the Ohio River basin
AU - Hettiarachchi, Suresh L.
AU - O'Connor, Bell L.
AU - Miller, Kimberly F.
AU - Kincaid, George P.
AU - Hibbs, David
AU - Gulliver, John S.
AU - Wilhelms, Steven
PY - 1997
Y1 - 1997
N2 - The reaeration process across hydraulic structures on the Ohio River was evaluated using in situ methane as a tracer. Reaeration rates determined from dissolved oxygen (DO) measurements are often unreliable when upstream DO concentration is near saturation. In such cases, the increase in DO as the flow passes the structure is small, leading to relatively large measurement uncertainties. Naturally occurring methane can be used as a tracer for DO because the difference between upstream and downstream dissolved methane concentration is sufficiently large for current analytical techniques. The relationship between methane and oxygen transfer is well documented. The reaeration effectiveness of various gate and gate openings at these structures was investigated. The results obtained suggest that the highest gas transfer, among the structures studied, takes place across gated spillways. In addition, the gas transfer efficiency was higher than expected, in some cases, for hydropower facilities on the Ohio River.
AB - The reaeration process across hydraulic structures on the Ohio River was evaluated using in situ methane as a tracer. Reaeration rates determined from dissolved oxygen (DO) measurements are often unreliable when upstream DO concentration is near saturation. In such cases, the increase in DO as the flow passes the structure is small, leading to relatively large measurement uncertainties. Naturally occurring methane can be used as a tracer for DO because the difference between upstream and downstream dissolved methane concentration is sufficiently large for current analytical techniques. The relationship between methane and oxygen transfer is well documented. The reaeration effectiveness of various gate and gate openings at these structures was investigated. The results obtained suggest that the highest gas transfer, among the structures studied, takes place across gated spillways. In addition, the gas transfer efficiency was higher than expected, in some cases, for hydropower facilities on the Ohio River.
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M3 - Conference article
AN - SCOPUS:0030653062
SN - 1057-1841
VL - 3
SP - 1961
EP - 1970
JO - Proceedings of the International Conference on Hydropower - Waterpower
JF - Proceedings of the International Conference on Hydropower - Waterpower
T2 - Proceedings of the 1997 International Conference on Hydropower. Part 1 (of 3)
Y2 - 5 August 1997 through 8 August 1997
ER -