Download or read book History Physical Effects and Management Implications of Large Organic Debris in Western Oregon Streams written by Frederick John Swanson and published by . This book was released on 1976 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Large organic debris has historically been an important element in small mountain streams of the Pacific Northwest. The debris serves to slow the movement of water and inorganic and fine organic matter through the channel. Debris may remain in the channel for decades or longer, and tends to stabilize some sections of a streambed and stream banks while destabilizing other areas. The combination of clear cutting and the complete removal of large debris in a channel may deprive a stream of this natural feature of streams for a century or longer. The consequences are likely to be downcutting and channelization" of the stream, accelerated transport of fine organic and inorganic sediment, and a possible decrease in biological productivity of the stream ecosystem. Therefore, stream debris management during logging operations should include leaving undisturbed the natural, stable organic debris in the channel.‍?‍?The principal factors controlling the concentration, stability, and functions of stream debris are the history and condition of the surrounding timber stand, flushing history of the channel, stability and abundance of bedload material, steepness of the channel and adjacent hillslopes, and slope stability in the drainage. Because of this complexity, each stream presents a unique situation, which should be inspected in the field and considered on an individual basis before a debris management decision is made."

Download or read book History Physical Effects and Management Implications of Large Organic Debris in Western Oregon Streams written by Frederick J. Swanson and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book History Physical Effects and Management Implications of Large Organic Debris in Western Oregon Streams written by Frederick John Swanson and published by . This book was released on 1976 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Large organic debris has historically been an important element in small mountain streams of the Pacific Northwest. The debris serves to slow the movement of water and inorganic and fine organic matter through the channel. Debris may remain in the channel for decades or longer, and tends to stabilize some sections of a streambed and stream banks while destabilizing other areas. The combination of clear cutting and the complete removal of large debris in a channel may deprive a stream of this natural feature of streams for a century or longer. The consequences are likely to be downcutting and channelization" of the stream, accelerated transport of fine organic and inorganic sediment, and a possible decrease in biological productivity of the stream ecosystem. Therefore, stream debris management during logging operations should include leaving undisturbed the natural, stable organic debris in the channel.‍?‍?The principal factors controlling the concentration, stability, and functions of stream debris are the history and condition of the surrounding timber stand, flushing history of the channel, stability and abundance of bedload material, steepness of the channel and adjacent hillslopes, and slope stability in the drainage. Because of this complexity, each stream presents a unique situation, which should be inspected in the field and considered on an individual basis before a debris management decision is made."

Download or read book Physical Consequences of Large Organic Debris in Pacific Northwest Streams written by Frederick John Swanson and published by . This book was released on 1978 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Source Area for Coarse Woody Debris in Small Streams in Western Oregon and Washington written by Mary Helen McDade and published by . This book was released on 1987 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large organic debris has important biological and physical roles within the stream ecosystem. In order to determine the source area of large organic debris in streams, thirty-nine streams in the Cascade and Coast Ranges of Oregon and Washington were sampled. The distance from point-of-origin to channel was measured for thirty pieces of debris located within or straddling each stream. Streams varied in order (first- through third-order), age of surrounding timber (old-growth or mature stands), and sideslope steepness (steep or gentle slopes). The distribution of source area was similar in all streams, with 11% of the total number of debris pieces originating within one meter of the channel, and 90% originating within thirty meters in 29 of the 39 streams. Debris originating as far as 60.5 meters from the channel was noted. Distance from origin to channel was significantly greater for streams draining old-growth forests, for third-order channels, and for conifer as opposed to hardwood debris pieces. There were no significant differences in distance from origin to channel for steep and gentle sloped areas. Other variables were also compared with respect to stream order, stand age, and sideslope steepness. These include movement of the piece from the point-of-origin, bench width, length of piece, diameter of piece, and average sideslope steepness. The distance the piece moved from its origin and the diameter of debris were larger in steeper areas, whereas the length of debris and bench width were greater in gentle areas. Debris originating in old-growth stands moved further from the origin and was larger in both diameter and length than debris originating in mature stands. There were no significant differences in bench width or slope steepness for old-growth and mature stands. Conifer debris pieces moved further downhill, were longer and larger in diameter, and originated on steeper slopes than did hardwood debris. There were no differences in bench width for conifer and hardwood pieces. Length and diameter of debris were greater for third-order channels in comparison to lower order channels, although no differences in these variables were noted between first- and second-order channels. Third-order channels had more gentle sideslopes than smaller streams. Bench width increased significantly as stream order increased. There were no significant differences in movement of debris from the origin with respect to stream order. Management implications of the study are discussed.

Download or read book Evolution of Large Organic Debris After Timber Harvest written by Mason D. Bryant and published by . This book was released on 1980 with total page 36 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 1984 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geomorphic Processes and Aquatic Habitat in the Redwood Creek Basin Northwestern California written by and published by . This book was released on 1995 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book USDA Forest Service General Technical Report PNW written by and published by . This book was released on 1978 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mountain Rivers written by Ellen E. Wohl and published by American Geophysical Union. This book was released on 2000 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book From the Forest to the Sea written by and published by . This book was released on 1988 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proposed Issuance of Multiple Species Incidental Take Permits Or 4 d Rules Covering the Washington State Forest Practices Habitat Conservation Plan written by and published by . This book was released on 2005 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Productivity of Forests of the United States and Its Relation to Soil and Site Factors and Management Practices written by and published by . This book was released on 1989 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book General Technical Report PNW written by and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Final Supplement to the Final Environmental Impact Statements for the Josephine and Jackson Klamath Sustained Yield Units Ten year Timber Management Plans written by United States. Bureau of Land Management and published by . This book was released on 1985 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Riparian Landscapes written by George Patrick Malanson and published by Cambridge University Press. This book was released on 1993-05-27 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Riparian Landscapes examines the ecological systems of streamside and floodplain areas from the perspective of landscape ecology. The specific spatial pattern of riparian vegetation is seen as a result of, and a control on, the ecological, geomorphological, and hydrological processes that operate along rivers. Riparian structures are controlled by the spatial dynamics of channels, flooding and soil moisture. These dynamics are part of integrated cascades of water, sediment, nutrients and carbon, to which animal and plant species respond in ways that illuminate community structure and competition. The role of the riparian zone in controlling species distribution and abundance is discussed. Intelligent management of these valuable ecological resources is highlighted. The potential for linking hydrological, geomorphological and ecological simulation models is also explored. This book will be of interest to graduate and professional research workers in environmental science, ecology and physical geography.

Download or read book Perspectives in Running Water Ecology written by M. Lock and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discipline of stream ecology has grown exponentially along with most other areas of science in the last three decades. The field has changed from a fish management-dominated poor-sister of limnology to a discipline with theoretical constructs and ecological insights as rich as those in any area of ecology. A focus on energy transformations, nutrient turnover and the storage and processing of organic substrates has greatly enhanced the development of current paradigms. For example, the data base on microbial-biochemical invertebrate interactions in streams is now very extensive. A survey of the stream ecology literature reveals the central role played by H.B. Noel Hynes, whom I believe to be the world's premier lotic ecologist. Professor Hynes produced the major text in the field ("The Ecology of Running Waters") which has served both as an integrative review and as a bridge between the fish-water quality orientation of the fifties and sixties to the process oriented, nutritional resource-watershed perspectives of the seventies. It should also be noted that Professor Hynes' book, "The Biology of Polluted Waters", served as a basic reference for the earlier period and he has published over 150 research papers, the great majority in stream ecology, spanning four decades.