Search Results for the EPA National Library Catalog

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Showing: Items 401 - 450
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Select Item Title Year Published
Early Eutrophication in the Lower Great Lakes: New Evidence from Biogenic Silica in Sediments. 1983
East Oakwood Lake, Brookings County, South Dakota. 1977
East Vermillion Lake, McCook County, South Dakota. 1976
Ecologic Impact of the Interactions Among Microorganisms and Aquatic Contaminants in Lake Erie. Phase III. Parts 5, 6, and 7. 1973
Ecological Characterization of Coastal Maine (North and East of Cape Elizabeth). Volume 2. 1980
Ecological Characterization of Rocky Mountain Montane and Subalpine Wetlands. 1986
Ecological Evaluation of Multiuse Waters Receiving Primary Treatment Effluent Prior to a Major Flow Increase. 1973
Ecological Evaluation of Stream Eutrophication. 1973
Ecological Factors Influencing Production of Algae in Northern Prairie Lakes. 1972
Ecological impact of integrated chemical and biological aquatic weed control : final report {MICROFICHE} / 1983
Ecological impacts of sewage discharges on coral reef communities / 1983
Ecological Perspective on Water Quality Goals. 1981
Ecological Studies and Mathematical Modeling of 'Cladophora' in Lake Huron: 3. The Dependence of Growth Rates on Internal Phosphorous Pool Size (Journal Version). 1982
Ecology of Floodplain Pools in the Kaskaskia River Basin of Illinois. 1973
Ecology of Peat Bogs of the Glaciated Northeastern United States: A Community Profile. 1987
Economic Analyses of Nutrient and Sediment Reduction Actions to Restore Chesapeake Bay Water Quality. 2003
Economic Analysis of Final Water Quality Standards for Nutrients for Lakes and Flowing Waters in Florida. 2010
Economic Impact of the Selenium Effluent Standard in Illinois (R76-21). 1977
Ecosystem Changes in Lakes Erie and Ontario. 1981
Ecosystem Models of the Patuxent River Estuary Relating Nutrient Loading to Production of Selected Fish Populations. Final Report, Year 1. 1994
Education of Best Management Practices in the Arroyo Colorado Watershed. 2009
Effect of Carbon to Nitrogen Ratio on Activated Sludge Subsidence and Dewatering Characteristics. 1974
Effect of Dredging on the Nutrient Levels and Biological Populations of a Lake. 1972
Effect of Environmental Factors on Phytoplankton Growth: Temperature and the Interactions of Temperature with Nutrient Limitation (Journal Version). 1981
Effect of Irrigation, Fertilization, and Other Cultural Practices on Water Quality. 1973
Effect of pH on the Release of Phosphorus from Potomac River Sediments. 1986
Effect of Phosphorus Removal Processes on Algal Growth. 1973
Effect of Secondary Effluents on Eutrophication in Las Vegas Bay, Lake Mead, Nevada. 1986
Effect of Silicate Grain Shape, Structure, and Location on the Biomass and Community Structure of Colonizing Marine Microbiota. 1981
Effect of Silt and Silt Removal in a Prairie Lake. 1973
Effect of Spectral Composition on Photosynthesis in Turbid Reservoirs. Photosynthetic Production in a Turbid Reservoir II. Details of an Incubation Model and Comments on the Effect of Light Quality on Photosynthesis. 1972
Effect of Stress and Non-Stress Conditions Upon the Interaction of Plectonema Boryanum and the LPP-Phycoviruses. 1973
Effect of Waste Discharges Into a Silt-Laden Estuary. A Case of Cook Inlet, Alaska. 1972
Effectiveness of soil and water conservation practices for pollution control / 1979
Effects of Acid Perturbation on a Controlled Ecosystem. 1981
Effects of Acid Precipitation on a Typic Quartzipsamment Soil in Florida. 1985
Effects of Acidic Precipitation on Benthos. 1985
Effects of Age and Water Fluctuations on the Limnological Factors of Impounded Waters. 1971
Effects of Ammonium and Nitrate on Nutrient Uptake and Activity of Nitrogen Assimilating Enzymes in Western Hemlock. 1993
Effects of Atrazine on Aquatic Ecosystems: A Physical and Mathematical Modeling Assessment. 1985
Effects of Atrazine on Periphyton Communities in Controlled Laboratory Ecosystems. 1985
Effects of Cellular Aggregation on the Ecology of Microorganisms: An Ecosystem-Level Understanding of Complex Microbial Systems Will Lead to Better Management of the Human Impact on Such Systems. 1990
Effects of Complex Effluents on Photosynthesis in Lake Erie and Lake Huron. 1988
Effects of Decreased Nutrient Loading on the Limnology of Diamond Lake, Oregon. Appendix. 1979
Effects of Detergent Polluted Water on Soil Reaction and Plant Growth. 1972
Effects of Different Mixing Schedules on Phytoplankton, Zooplankton and Nutrients in Marine Microcosms. 1981
Effects of Enrichment on Lake Superior Periphyton. 1973
Effects of flow equalization on the operation and performance of an activated sludge plant / 1977
Effects of large scale forest fires on water quality in interior Alaska, 1970
Effects of livestock pasturing on nonpoint surface runoff / 1983
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