| Main Title |
Nitrogen Supersaturation in the Columbia and Snake Rivers. |
| Author |
Rulifso, Robert L. ;
Abe, George ;
|
| CORP Author |
Environmental Protection Agency, Seattle, Wash. Region X. |
| Year Published |
1971 |
| Report Number |
EPA-TS-09-70-208-016.2; |
| Stock Number |
PB-205 150 |
| Additional Subjects |
( Rivers ;
Dissolved gases) ;
( Hydroelectric power generation ;
Dissolved gases) ;
( Water pollution ;
Nitrogen) ;
Toxicology ;
Fishes ;
Abatement ;
Supersaturation ;
Water quality ;
Salmon ;
Aeroembolism ;
Dams ;
Washington(State) ;
Oregon ;
Columbia River ;
Snake River
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-205 150 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
125p |
| Abstract |
Nitrogen supersaturation, caused by the series of hydroelectric dams on the Columbia and Snake Rivers, seriously threatens the future of salmon and steelhead in the Pacific Northwest. A study was made to determine the scope of the problem and recommend solutions. Nitrogen supersaturation is caused when river flows exceed the capacity of power generating turbines in dams and excess flow must be passed over the spillway. Concentrations of dissolved nitrogen up to 147 percent of surface equilibrium concentrations have been measured. Levels above 105 percent produce symptoms of gas-bubble disease in fish and levels above 120 percent are lethal. Increasing use of the hydroelectric system for peak power generation may add to the problem. Recommendations are included. |
