Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Eutrophication of surface waters--Lake Tahoe /
Author McGauhey, P. H.
Other Authors
Author Title of a Work
Dugan, Gordon L.
Porcella, D. B.
McGauhey, P. H.
Dugan, G. L.
CORP Author Lake Tahoe Area Council.
Publisher U.S. Government Printing Office,
Year Published 1972
Report Number EPA16010-DSW-05/71; W7212955; EPA 950/R-72-031
OCLC Number 00380306
Subjects Selenastrum. ; Eutrophication--Tahoe, Lake (Calif. and Nev.) ; United States--Lake Tahoe. ; Water Pollution, Chemical.
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 16010-DSW-05-71 Headquarters Library/Washington,DC 05/12/2014
EJBD  EPA 16010-DSW-05-71 Headquarters Library/Washington,DC 06/26/2015
ELBD RPS EPA 16010-DSW-05-71 repository copy AWBERC Library/Cincinnati,OH 08/17/2020
ERAD  EPA 950/R-72-031 Region 9 Library/San Francisco,CA 09/26/2013
Collation xi, 154 pages : illustrations ; 28 cm.
"16010 DSW 05/71." Includes bibliographical references.
Contents Notes
A survey was made of nutrient and other chemical constituents of surface waters from developed and undeveloped land areas, sewage effluents, seepage from septic tank percolation system and refuse fills, drainage from swamps, precipitation, and Lake Tahoe water. Algal growth stimulating potential of the samples were bioassayed with Selenastrum gracile as a test organism. Algal response to nutrients was measured by maximum growth rate and maximum cell count in a 5-day growth period. Ponds simulating the shallow portions of the lake were used for continuous flow assay of the biomass of indigenous lake organisms produced by sewage effluent. Flask assays and chemical analyses were made over two years on three major creeks. Twenty-eight other creeks and precipitations were monitored by chemical analysis. Evaluating the eutrophication potential, Lake Tahoe is nitrogen sensitive and responds to it in proportion to its concentration.