A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Gas Bubble Disease in Resident Fish Below Grand Coulee Dam. Final Report of Research
Fish kills have occurred in the reservoir below Grand Coulee Dam possibly due to total dissolved gas supersaturation (TDGS), which occurs when water cascades over a dam or waterfall. The highest TDGS below Grand Coulee Dam has occurred after spilling water via the outlet tubes, though TDGS from upstream sources has also been recorded. Exposure to TDGS can cause gas bubble disease in aquatic organisms. This disease, analogous to the bends in human divers, can range from mild to fatal depending on the level of supersaturation, species, life cycle stage, condition of the fish, fish depth, and the water temperature. The USGS, Western Fisheries Research Center's Columbia River Research Laboratory conducted field and laboratory experiments to determine the relative risks of TDGS to various species of fish in the reservoir below the dam. Field work included examination of over 8000 resident fish for signs of gas bubble disease, examination of the annual growth increments of several species relative to ambient TDGS, and recording the in-situ depths and temperatures of several species using miniature recorders surgically implanted in both resident fish and triploid steelhead reared in commercial net pens.
Gas Bubble Disease in Resident Fish Below Grand Coulee Dam. Final Report of Research
Fish kills have occurred in the reservoir below Grand Coulee Dam possibly due to total dissolved gas supersaturation (TDGS), which occurs when water cascades over a dam or waterfall. The highest TDGS below Grand Coulee Dam has occurred after spilling water via the outlet tubes, though TDGS from upstream sources has also been recorded. Exposure to TDGS can cause gas bubble disease in aquatic organisms. This disease, analogous to the bends in human divers, can range from mild to fatal depending on the level of supersaturation, species, life cycle stage, condition of the fish, fish depth, and the water temperature. The USGS, Western Fisheries Research Center's Columbia River Research Laboratory conducted field and laboratory experiments to determine the relative risks of TDGS to various species of fish in the reservoir below the dam. Field work included examination of over 8000 resident fish for signs of gas bubble disease, examination of the annual growth increments of several species relative to ambient TDGS, and recording the in-situ depths and temperatures of several species using miniature recorders surgically implanted in both resident fish and triploid steelhead reared in commercial net pens.
Gas Bubble Disease in Resident Fish Below Grand Coulee Dam. Final Report of Research
J. W. Beeman (author) / D. A. Venditti (author) / R. G. Morris (author) / D. M. Gadomski (author) / B. J. Adams (author)
2003
167 pages
Report
No indication
English
Fisheries & Aquaculture , Ecology , Water Pollution & Control , Gas bubble disease , Fishes , Dams , Dissolved gases , Aquatic ecosystems , Hydroelectric power plants , Supersaturation , Species diversity , Mortality , Biological effects , Water quality , Water temperature , Fish passage facilities , Grand Coulee Dam
SPECIAL REPORT: Grand Coulee Dam - Improving the Performance of Grand Coulee Equipment
| Online Contents | 2001
Engineering Index Backfile | 1938
SPECIAL REPORT: Grand Coulee Dam - The Great Grand Coulee Dam: One Project, Many Purposes
| Online Contents | 2001
Engineering Index Backfile | 1942
Engineering Index Backfile | 1938