Download or read book Sediment Oxygen Demand Investigations of the Willamette River Portland Oregon written by Nelson A. Thomas and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sediment Oxygen Demand in the Lower Willamette River Oregon 1994 written by James M. Caldwell and published by . This book was released on 1995 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sediment Oxygen Demand in the Lower Willamette River Oregon 1994 written by James M. Caldwell and published by . This book was released on 1995 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Steady state Dissolved Oxygen Model of the Willamette River Oregon written by Geological Survey (U.S.) and published by . This book was released on 1978 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sediment Oxygen Demand in the Lower Willamette River Oregon 1994 written by James M. Caldwell and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water resources Investigations Report written by and published by . This book was released on 1995 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sediment Oxygen Demand in the Tualatin River Basin Oregon 1992 96 written by Stewart Rounds and published by . This book was released on 1997 with total page 28 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 Water resources Investigations Report written by and published by . This book was released on 2003 with total page 24 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 Reservoir system Model for the Willamette River Basin Oregon written by James O. Shearman and published by . This book was released on 1976 with total page 32 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 The Effect of Chamber Mixing Velocity on Bias in Measurement of Sediment Oxygen Demand Rates in the Tualatin River Basin Oregon written by Micelis C. Doyle and published by . This book was released on 2003 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quality of Bottom Material and Elutriates in the Lower Willamette River Portland Harbor Oregon written by Gregory J. Fuhrer and published by . This book was released on 1989 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Planning Alternatives for Maintaining Desirable Dissolved oxygen Concentrations in Willamette River Oregon written by and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Processes Controlling Dissolved Oxygen and PH in the Upper Willamette River Basin Oregon 1994 written by Ted R. Pogue and published by . This book was released on 1995 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Field and Data Report written by Oregon. Department of Environmental Quality and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sediment Oxygen Demand in Lake Ewauna and the Klamath River Oregon June 2003 written by Micelis C. Doyle and published by . This book was released on 2005 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: