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Ammonia annual mean Cedar River chlorophyll CM CM 00 CM CM CM CM CM rH CM cn CM o rH CM rH CM CM rH rH CM rx CM st cn CM cn cn cn cn CO st cn rH colorimeter concentration Corvallis Environmental Research Daphnia diversion of sewage Edmondson 1972a Environmental Protection Agency Environmental Research Laboratory epilimnion eutrophication Figure H CM hypolimnion i-H rH i—I rH inflow Klett Lake Washington Limnol Limnology maximum method nitrate ov ov Ov rH Oxygen perchloric acid period of study pH pH pH rH phytoplankton plankton recovery of Lake rH a rH rH CM CM rH CM rH rH cn rH H rH pH rH rH CM rH rH rH rx CM rx ov Secchi disc transparency Seston summer Table total phosphorus content trophic equilibrium U.S. Environmental Protection U.S. Weather Bureau University of Washington Vollenweider watershed winter zooplankton
Page ii - US Environmental Protection Agency, and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.
Page iii - FOREWORD Effective regulatory and enforcement actions by the Environmental Protection Agency would be virtually impossible without sound scientific data on pollutants and their impact on environmental stability and human health. Responsibility for building this data base has been assigned to EPA's Office of Research and Development and its l5 major field installations, one of which is the Corvallis Environmental Research Laboratory (CERL).
Page iii - EPA's Office of Research and Development and its 15 major field installations, one of which is the Corvallis Environmental Research Laboratory (CERL). The primary mission of the Corvallis Laboratory is research on the effects of environmental pollutants on terrestrial, freshwater, and marine ecosystems; the behavior, effects and control of pollutants in lake systems; and the development of predictive models on the movement of pollutants in the biosphere.
Page 36 - Release to public 19. SECURITY CLASS (This Report) unclassified 21. NO. OF PAGES 20 SECURITY CLASS (This page) unclassified 22. PRICE EPA Form 2220-1 (Rev.
Page 15 - In DG Frey [ed] Limnology in North America. University of Wisconsin Press. Madison.
Page iv - University under the sponsorship of the US Environmental Protection Agency. This report covers the period November 1, 1972 to July 1, 1976, and work was completed as of November 30, 1976.
Page 16 - TG THOMPSON, 1948. The determination of phosphates in sea water. — J. mar. Res., 7: 33-41.