Download or read book Eutrophication of Surface Waters Lake Tahoe written by Percy Harold McGauhey and published by . This book was released on 1972 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Eutrophication of Surface Waters written by Lake Tahoe Area Council and published by . This book was released on 1975 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Eutrophication of Surface Waters Lake Tahoe Indian Creek Reservoir written by Percy Harold McGauhey and published by . This book was released on 1971 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The water impounded at Indian Creek Reservoir near Lake Tahoe, California is approximately one-third surface runoff and direct precipitation and two-thirds reclaimed water exported from South Tahoe Public Utility District Plant. Discussed are the results of tests which determined the temporal changes and relationships between water quality characteristics of Indian Creek Reservoir and those of the reclaimed water. Initially the reservoir would not support fish life, but as the reservoir matured, ammonia levels declined to less than 4 mg/l and by 1970 it was an excellent trout fishery. Approximately 70% of the ammonia nitrogen was lost to the atmosphere by nitrification-denitrification. Good biological productivity indicated access to other phosphorus sources, probably runoff. Relative to conductivity and chemical components the water is of good irrigation quality. Various parameters showed that the reservoir responds to more complex factors than those measurable in the reclaimed waste water, raising the question of the effectiveness of tertiary treatment for recreational impoundments.

Download or read book Lake Tahoe Watershed Assessment Untitled written by and published by . This book was released on 2000 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water Pollution Control Research Series 16010 DSW 05 71 Eutrophication of Surface Waters Lake Tahoe written by United States. Enviornmental Protection Agency and published by . This book was released on 1971 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water Pollution Control Research Series 16010 DNY 07 71 Etrophication of Surface Waters Lake Tahoe Indian Creek Reservoir written by United States. Enviornmental Protection Agency and published by . This book was released on 1971 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book EPA 670 4 written by and published by . This book was released on 1973-07 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Survey Professional Paper written by and published by . This book was released on 1977 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Survey Professional Paper written by Geological Survey (U.S.) and published by . This book was released on 1977 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hearings written by United States. Congress. Senate. Committee on Commerce and published by . This book was released on 1972 with total page 1602 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Professional Paper written by and published by . This book was released on 1976 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Indexed Bibliography of Office of Research and Development Reports Updated to January 1975 written by United States. Environmental Protection Agency. Office of Program Management and published by Washington : U.S. Environmental Protection Agency, Office of Research and Development. This book was released on 1975 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Field and Laboratory Methods for Measuring the Quality of Surface Waters and Effluents written by Cornelius I. Weber and published by . This book was released on 1980 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Appendix written by United States. Congress. Senate. Committee on Commerce. Subcommittee on the Environment and published by . This book was released on 1972 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Indicators of Freshwater Pollution and Environmental Management written by J.M. Hellawell and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: The preface of a book often provides a convenient place in which the author can tender his apologies for any inadequacies and affords him the facility to excuse himself by reminding the reader that his art is long but life, or at least the portion of it in which he has the opportunity for writing books, is short. I, too, am deeply conscious that I have undertaken a task which I could not hope to complete to my own satisfaction but I offer, in self defence, the observation that, inadequate though it is, there is no other book extant, so far as I am aware, which provides the information contained herein within the covers of a single volume. Often during the last decade, in discharging my responsibilities for the environmental aspects of the water authority's operations and works, I should have been deeply grateful to have had access to a compendium such as this. The lack of a convenient source of data made me aware of the need which I have attempted to fill and in doing so I have drawn on my experiences of the kinds of problem which are presented to biologists in the water industry. The maxim 'half a loaf is better than none' seems particularly apt in this context.

Download or read book Progress in Water Technology written by and published by . This book was released on 1973 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Consequences of Plant Residue Decomposition in Soil written by William Cowperthwaite Snyder and published by . This book was released on 1972 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: