Download or read book Algal Conditions and the Potential for Future Algal Problems in the Willamette River Oregon written by David A. Rickert and published by . This book was released on 1977 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: For nearly half a century the Willamette River in Oregon experienced severe dissolved-oxygen problems related to large loads of organically rich waste waters from industries and municipalities. Since the mid-1950's dissolved oxygen quality has gradually improved owing to low-flow augmentation, the achievement of basinwide secondary treatment, and the use of other waste-management practices. As a result, summer dissolved-oxygen levels have increased, salmon runs have returned, and the overall effort is widely regarded as a singular water-quality success. To document the improved dissolved-oxygen regimen, the U.S. Geological Survey conducted intensive studies of the Willamette during the summer low-flow seasons of 1973 and 1974. During each summer the mean daily dissolved-oxygen levels were found to be higher than 5 milligrams per liter throughout the river. Because of the basinwide secondary treatment, carbonaceous deoxygenation rates were low. In addition, almost half of the biochemical oxygen demand entering the Willamette was from diffuse (nonpoint) sources rather than outfalls. These results indicated that point-source biochemical oxygen demand was no longer the primary cause of dissolved-oxygen depletion. Instead, the major causes of deoxygenation were nitrification in a shallow ' surface active ' reach below Salem and an anomalous oxygen demand (believed to be primarily of benthal origin) in Portland Harbor.

Download or read book River quality Assessment of the Willamette River Basin Oregon Algal Conditions and the Potential for Future Algal Problems in the Willamette River Oregon written by Geological Survey (U.S.) and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water quality and Algal Conditions in the Clackamas River Basin Oregon and Their Relations to Land and Water Management written by Kurt D. Carpenter and published by . This book was released on 2003 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissolved Oxygen Regimen of the Willamette River Oregon Under Conditions of Basinwide Secondary Treatment written by and published by . This book was released on 1977 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Better Monitoring Techniques are Needed to Assess the Quality of Rivers and Streams written by United States. General Accounting Office and published by . This book was released on 1981 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Survey Circular written by and published by . This book was released on 1977 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Survey Circular written by Geological Survey (U.S.) and published by . This book was released on with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Planning Alternatives for Maintaining Desirable Dissolved oxygen Concentrations in the Willamette River Oregon written by David A. Rickert and published by . This book was released on 1976 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Appraisal of storm water quality near Salem Oregon written by Timothy L. Miller and published by . This book was released on 1987 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Portland Sewage Sludge Disposal written by and published by . This book was released on 1979 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecological Effects of Waste Water written by Fereidoon Shahidi and published by CRC Press. This book was released on 1992-09-24 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: This substantially revised and update edition of a work first published in 1980 in the USA and deals with the ecological effects of water pollution. It is the result of twenty years of teaching the subject and will be essential reading for all those interested in water quality.

Download or read book Water resources Investigations Report written by and published by . This book was released on 2002 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toxicity of Mount St Helens Ash Leachate to a Blue green Alga written by Diane M. McKnight and published by . This book was released on 1981 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pollutant Effects in Freshwater written by J. Jacoby and published by CRC Press. This book was released on 2004-06-01 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pollutant Effects in Freshwater provides a practical and concise introduction to the ecological consequences of water pollution in aquatic ecosystems. In tackling the problem of water quality deterioration, this book combines the limnological and water pollution literature to describe how pollutants in wastewater affect populations of organisms in freshwater environments. Substantially revised, updated and expanded, with additional specialist contributors, this retitled new edition of Ecological Effects of Wastewater will continue to focus on the effects and management of eutrophication, water quality standards to protect aquatic life, and widen the debate over micro organisms and their public health significance in the aquatic environment. With ever tighter controls on pollution levels of freshwater bodies being implemented and enforced world wide, this book is essential reading for students of public health and environmental engineering, and a reference tool for professionals in consultancies, contractors and for those in regulatory and enforcement bodies.

Download or read book Nutrient Criteria Technical Guidance Manual written by and published by . This book was released on 2000 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water in Environmental Planning written by Thomas Dunne and published by Macmillan. This book was released on 1978-08-15 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt: A classic advanced undergraduate/graduate level text showing how knowledge of hydrology, fluvial geomorphology, and river quality are used in environmental planning. The focus is on maintenance or reclamation of environmental quality, with the text, examples, and exercises emphasizing early identification of problems and address nonstructural solutions

Download or read book U S Geological Survey Circular written by and published by . This book was released on 1933 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: