Open-File Report 2012–1256
Significant FindingsAir is entrained in water as it is flows through the spillways of dams, which causes an increase in the concentration of total dissolved gas in the water downstream from the dams. The elevated concentrations of total dissolved gas can adversely affect fish and other freshwater aquatic life. An analysis of total-dissolved-gas and water-temperature data collected at eight monitoring stations on the lower Columbia River in Oregon and Washington in 2012 indicated the following:
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Tanner, D.Q., Bragg, H.M., and Johnston, M.W., 2013, Total dissolved gas and water temperature in the lower Columbia River, Oregon and Washington, water year 2012—Quality-assurance data and comparison to water-quality standards: U.S. Geological Survey Open-File Report 2012–1256, 26 p.
Significant Findings
Introduction
Methods of Data Collection
Completeness and Quality of Data for Total Dissolved Gas
Quality-Assurance Data
Effects of Spill on Concentration of Total Dissolved Gas
Comparison of Total-Dissolved-Gas Concentration and Water Temperature to Water-Quality Standards
Acknowledgments
References Cited