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ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.3/5 (121 download)
Download or read book Influence of Stream Characteristics and Grazing Intensity on Stream Temperatures in Eastern Oregon written by and published by . This book was released on 1999 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Karl T. Hopkins
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ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.:/5 (559 download)
Download or read book The Thermal Characteristics of Hydrologically Intact Type C and E Streams in Eastern Oregon written by Karl T. Hopkins and published by . This book was released on 2003 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many streams in eastern Oregon are listed as water quality impaired on the basis of water temperature. However, it is often difficult to predict water temperature for these streams even if there are no anthropogenic impacts. We measured air and water temperature and stream characteristics on three Type C and E channel streams to determine if stream type can help predict stream thermal characteristics. All six streams were hydrologically intact, assessed as Proper Functioning Condition (PFC), and were located in eastern and south central Oregon. Water and air temperatures and stream geomorphic data were taken during the summer months of 1998 and 1999. Average daily maximum and minimum water temperature and average daily maximum and minimum rates of change in water temperature following normalization of data with estimated water residence time were analyzed. There was more variation within stream type than across groups, which precluded separation of stream types based on thermal characteristics. Most streams regardless of type and year exhibited similar daily mean nighttime recoveries of approximately 0.53°C/hour cooling in the downstream direction following normalization by water residence time. All of the streams heated at least 1.0°C/hour during the day with some streams gaining 2.25°C/hour in the downstream direction following normalization by water residence time. Thermal variation among the streams was likely a result of the daily initial water temperature, the gradient between stream and thermal environment, and the varied physical character of each stream within type. Atmospheric temperature is probably the single most critical factor for characterizing stream temperature behavior during the periods of heating and cooling.
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ISBN 13 :
Total Pages : 722 pages
Book Rating : 4.:/5 (319 download)
Download or read book Rangeland Ecology & Management written by and published by . This book was released on 2005 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 432 pages
Book Rating : 4.F/5 ( download)
Download or read book Lake Tahoe Watershed Assessment: Appendixes written by and published by . This book was released on 2000 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1732 pages
Book Rating : 4.E/5 ( download)
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Author : Pacific Northwest Research Station (Portland, Or.)
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ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (319 download)
Download or read book A Year in Review for the Pacific Northwest Research Station written by Pacific Northwest Research Station (Portland, Or.) and published by . This book was released on 1999 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 528 pages
Book Rating : 4.3/5 (117 download)
Download or read book Journal of Soil and Water Conservation written by and published by . This book was released on 2003 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vol. 25, no. 1 contains the society's Lincoln Chapter's Resource conservation glossary.
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ISBN 13 :
Total Pages : 402 pages
Book Rating : 4.0/5 ( download)
Download or read book Environmental Effects of Conservation Practices on Grazing Lands written by and published by . This book was released on 2006 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Danielle D. Smith
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ISBN 13 :
Total Pages : 338 pages
Book Rating : 4.:/5 (65 download)
Download or read book Contributions of Riparian Vegetation and Stream Morphology to Headwater Stream Temperature Patterns in the Oregon Coast Range written by Danielle D. Smith and published by . This book was released on 2004 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of riparian forests in maintaining temperatures of headwater streams is well established and is a foundation of forest practice rules designed to protect streamwater quality. However, detailed investigation is still needed quantifying specific characteristics of stream systems that affect streamwater temperature including riparian features, stream morphology, and subsurface interactions. The objectives of this research were to investigate summertime streamwater temperature patterns and identify characteristics within headwater streams and riparian zones that influence stream temperature. This study was designed to evaluate these relationships prior to logging in 38 perennial headwater catchments of the Oregon Coast Range. Stream reaches of greater than 1000 m were instrumented with temperature probes and selected stream and riparian characteristics were measured at 60-m intervals within each study reach in 2002 and 2003. A subset of the streams was examined in 2003 to determine the potential influence of streamwater residence time on temperature patterns. Findings suggest that canopy cover is the driving factor controlling summer stream temperature in these small headwater streams, but other stream and riparian characteristics should not be discarded. Longitudinal stream temperature patterns were quite variable for these forested streams and results suggest a high degree of complexity in small headwater streams. Maximum 7-day moving average temperatures ranged from 11.4°C to 16.8°C, with three streams above the standard 16°C threshold. Effects of stream and riparian characteristics on stream temperature were strongest when average of the weekly high temperature was assessed, suggesting this may be a more sensitive index of stream temperature than the commonly used maximum 7-day moving average. Results of tracer dilution tests were inconclusive in that temperature was not consistently correlated to residence time in streams.
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1016 pages
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Download or read book General Technical Report PNW-GTR written by and published by . This book was released on 1999 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : California. Professional Foresters Registration
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ISBN 13 :
Total Pages : 290 pages
Book Rating : 4.:/5 (7 download)
Download or read book Licensing News written by California. Professional Foresters Registration and published by . This book was released on 2000 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 332 pages
Book Rating : 4.:/5 (319 download)
Download or read book Search for a Solution written by and published by . This book was released on 1996 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Total Pages : 882 pages
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Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Total Pages : 16 pages
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Download or read book Stream Chemistry Responses to Four Range Management Strategies in Eastern Oregon written by and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Craig A. Carr
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ISBN 13 :
Total Pages : 310 pages
Book Rating : 4.:/5 (564 download)
Download or read book The Influence of Environmental and Physical Factors on the Thermal Patterns of Headwater Streams written by Craig A. Carr and published by . This book was released on 2003 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: A case study was performed in 2000 and 2001 to characterize the thermal pattern of four morphologically similar eastern Oregon streams and to identify the physical and environmental factors that expressed significant and functionally viable relationships with stream temperature (daily maximum, daily minimum and daily rate of heating). Stream and environmental attributes were measured at various locations along each stream to provide a data set comprised of variables representing daily stream temperatures (minimum, maximum and rates of heating), daily air temperatures (minimum and maximum), shade, elevation, elevation change and length. Data from the 20 hottest days were analyzed using analysis of variance and regression-based path analysis. With the exception of those reaches that were influenced by groundwater or subsurface flow, downstream reaches consistently experienced increases in the daily maximum stream temperature. The most significant parameter with respect to daily maximum stream temperature appeared to be reach elevation; expressed through reach location in the watershed. Maximum air temperature also positively influenced maximum stream temperature however, only on streams that expressed significant variation in maximum air temperature. The dominant influence of groundwater on maximum stream temperature was also apparent. Significant reach level variation in daily minimum stream temperatures was not observed in this study, however most streams did record increases in the downstream direction. Daily minimum air temperature was consistent across all streams in expressing the most significant relationship with daily minimum stream temperature. With the exception of groundwater influenced reaches, all streams exhibited obvious downstream increases in the daily rate of stream heating. Daily minimum air temperature consistently exhibited a significant negative association with the rate of heating and a relationship was also implied between reach elevation, maximum stream temperature and minimum stream temperature and this stream temperature response. Groundwater and subsurface flow, when present, also appeared to influence the daily rate of stream heating. Resource management activities should have little impact on the parameters found, on these streams, to be associated with stream temperature. Location in the watershed and climatic influence through both minimum and maximum air temperatures emerged as the dominant factors with respect to stream thermal patterns.
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ISBN 13 :
Total Pages : 914 pages
Book Rating : 4.F/5 ( download)
Download or read book Appendices, Final Environmental Impact Statement written by and published by . This book was released on 1989 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt:
