| Main Title |
Nutrient diversion : resulting lake trophic state and phosphorus dynamics / |
| Author |
Welch, E. B.
|
| CORP Author |
Washington Univ., Seattle.;Corvallis Environmental Research Lab., Oreg. |
| Publisher |
Environmental Protection Agency, Office of Research and Development, Corvallis Environmental Research Laboratory ; |
| Year Published |
1977 |
| Report Number |
EPA-600/3-77-003; EPA-R-800512 |
| Stock Number |
PB-262 645 |
| OCLC Number |
02759506 |
| ISBN |
pbk. |
| Subjects |
Algae--Washington (State) ;
Eutrophication--Washington (State) ;
Lakes--Washington (State) ;
Limnology--Washington (State)
|
| Additional Subjects |
Lake Sammamish ;
Limnology ;
Phosphorus ;
Water pollution ;
Algae ;
Chlorophylls ;
Nutrients ;
Sediments ;
Ions ;
Concentration(Composition) ;
Tables(Data) ;
Primary biological productivity ;
Graphs(Charts) ;
Washington(State) ;
Eutrophication ;
Trophic level ;
Organic loading
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD ARCHIVE |
EPA 600-3-77-003 |
|
Headquarters Library/Washington,DC |
03/04/2014 |
| EJBD |
EPA 600-3-77-003 |
c.1 |
Headquarters Library/Washington,DC |
05/23/2014 |
| ESAD |
EPA 600-3-77-003 |
|
Region 10 Library/Seattle,WA |
06/10/2005 |
| ESBD |
EPA 600/3-77/003 |
|
CPHEA/PESD Library/Corvallis,OR |
01/31/1997 |
| NTIS |
PB-262 645 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
x, 91 pages : illustrations, graphs, map ; 28 cm |
| Abstract |
Lake Sammamish, Washington, was studied during 1970-75 to determine its response to wastewater diversion in 1968. The results were compared with a pre-diversion study in 1964-65. Diversion reduced the phosphorus loading by about one-third (from 1.02 to 0.67 g P/sq m. yr and about 119 to 68 micro g/l in the inflow). Winter total phosphorus remained constant and no trend was shown in chlorophyll a in spring-summer. Water transparency remained the same. Paleolimnological evidence suggests that the lake has been near its present mesotrophic state for about 100 years. This stability is thought to be due to the constancy of the water phosphorus concentration which is in turn controlled by the anaerobic-aerobic release and sedimentation of iron and its complexes. |
| Notes |
Prepared by University of Washington, Seattle, Wash., under research grant R 800512. Includes bibliographical references (pages 88-90). |
