Open-File Report 2008–1357
Significant FindingsWhen water is released through the spillways of dams, air is entrained in the water, increasing the downstream concentration of dissolved gases. Excess dissolved-gas concentrations can have adverse effects on freshwater aquatic life. The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers, collected dissolved-gas and water-temperature data at eight monitoring stations on the lower Columbia River in Oregon and Washington in 2008. Significant findings from the data include:
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Tanner, D.Q., Bragg, H.M., and Johnston, M.W., 2008, Total dissolved gas and water temperature in the lower Columbia River, Oregon and Washington, 2008—Quality-assurance data and comparison to water-quality standards: U.S. Geological Survey Open-File Report 2008–1357, 25 p.
Significant Findings
Introduction
Methods of Data Collection
Summary of Total-Dissolved-Gas Data Completeness and Quality
Quality-Assurance Data
Effects of Spill on Total Dissolved Gas
Comparison of Total Dissolved Gas and Temperature to Standards
Acknowledgments
References Cited