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Debris Flow Characteristics Associated With Forest Practices In The Central Oregon Coast Range
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Book Synopsis Debris Flow Characteristics Associated with Forest Practices in the Central Oregon Coast Range by : Christine L. May
Download or read book Debris Flow Characteristics Associated with Forest Practices in the Central Oregon Coast Range written by Christine L. May and published by . This book was released on 1998 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Debris flows in the Pacific Northwest play a major role in routing wood and sediment stored on hillslopes and in first- through third-order channels to higher order channels and valley floors. Forest practices on steep, unstable slopes and removal of riparian trees along low-order streams can affect the frequency, magnitude, and composition of debris flows. The quantity and quality of debris flow deposits provides sediment and wood fundamental to the development of the receiving channel. Field surveys document characteristics of the initiation site, runout zone, and deposit of 53 debris flows in the Siuslaw Basin of the central Oregon Coast Range, during the winter of 1996. Landslides that initiated debris flows in clearcuts had a higher frequency, larger average volume, and runout zones that affected a greater length of stream channel than landslides from forested slopes. This difference resulted in an increase in the total volume of sediment mobilized by the debris flow, and a greater proportion of this sediment came from hillslope sources. Debris flows initiated at roads had an order of magnitude greater volume of sediment compared to non-road-related failures. Debris flows of equivalent size that traveled through a forested channel delivered only a slightly greater volume of large wood, than those through clearcuts. Size-class distributions of wood in the deposit and trees on the hillslope were not well correlated. The average diameter of wood in the deposit was greater than the diameter of trees currently present on the surrounding hillslopes. This difference reflects the legacy of large woody debris stored in low-order channels and valley floors. Large trees along the edge of the runout zone is also an important component in the recovery of these low-order channels, which were transformed into a bedrock state. Large trees along the edges of forested slopes are already supplying wood to these channels, and were the only mechanism observed for trapping large volumes of sediment. This mechanism for retaining sediment in high gradient, low-roughness channels is not available in clearcuts, which now contain the greatest proportion of bedrock channels. Forest practices, by altering the frequency, magnitude, and composition of the debris flow, may alter the long-term potential for developing complex channel morphology and high-quality aquatic habitat.
Book Synopsis The Importance of Wood in Headwater Streams of the Oregon Coast Range by : Christine May
Download or read book The Importance of Wood in Headwater Streams of the Oregon Coast Range written by Christine May and published by . This book was released on 2004 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mass Movement Response to Forest Management in the Central Oregon Coast Ranges by : Stuart Gresswell
Download or read book Mass Movement Response to Forest Management in the Central Oregon Coast Ranges written by Stuart Gresswell and published by . This book was released on 1979 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Riparian Vegetation and Fluvial Geomorphology by : Sean J. Bennett
Download or read book Riparian Vegetation and Fluvial Geomorphology written by Sean J. Bennett and published by American Geophysical Union. This book was released on 2004-01-09 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Water Science and Application Series, Volume 8. Riparian Vegetation and Fluvial Geomorphology presents important new perspectives for the experimentalist, the field practitioner, the theorist, and the modeler, offering a synthesis of scientific advances along with discussions of unresolved problems and research opportunities. The volume is structured in five sections.
Download or read book Wild Trout VII written by and published by . This book was released on 2000 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forest and Stream Management in the Oregon Coast Range by : Stephen D. Hobbs
Download or read book Forest and Stream Management in the Oregon Coast Range written by Stephen D. Hobbs and published by . This book was released on 2002 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This major volume presents a wealth of fundamental and applied research on managing Coast Range forest and stream ecosystems. Written primarily for managers and resource specialists, the book will also appeal to policymakers, resource scientists, forest landowners, the conservation community, and students interested in forestry, fisheries, and wildlife sciences.
Book Synopsis Recruitment Trends and Physical Characteristics of Course Woody Debris in Oregon Coast Range Streams by : David C. Heiman
Download or read book Recruitment Trends and Physical Characteristics of Course Woody Debris in Oregon Coast Range Streams written by David C. Heiman and published by . This book was released on 1988 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigated the long-term consequences of timber stand removal on the recruitment, physical characteristics, and spatial distribution of coarse woody debris in small (second- and third-order) streams of the Oregon Coast Range. A chronosequence of stream-stand systems, ranging from 21- to 140-years since disturbance (YSD), were sampled to determine temporal trends in coarse woody debris characteristics along with successional changes in riparian forests. Total debris volumes ranged from 135 to 864 cubic meters per hectare. No distinct trend was found in the total volume of debris over time because of the variable effects of the disturbance event on pre-disturbance debris volumes (debris delivered prior to or during the disturbance event). Post-disturbance deliveries (debris delivered after disturbance by second-growth stand) of deciduous debris increased through 65-YSD then decreased. Post-disturbance coniferous debris volumes, which were first detected at the 28-YSD site, increased from 28- to 140-YSD. Pre-disturbance coniferous debris comprised the largest proportion of the total volume in the stream system until approximately 122-YSD at which time post-disturbance coniferous debris made up the largest proportion of total debris volume. At all sites the largest volume of pre-disturbance debris volumes were in the large (greater than 0.30 meters) diameter size class while the largest proportion of post-disturbance debris volumes were in the large diameter class only at the 65- through 140-YSD sites. The largest proportion of pre-disturbance debris volumes were in the large (greater than 4.0 meters) length size class at the 28- through 140-YSD sites and the largest proportion of post-disturbance debris was in the large size class at the 28- through 140-YSD sites. Morisita's index of dispersion, I[subscript sigma] was used to test the type of spatial distribution pattern followed by the debris pieces. Results indicate that debris pieces in the pre- and post-disturbance delivery classes along with total pieces tended to fol 1cM a contagious (clumped) spatial distribution pattern at all sites. Results from this study will provide an improved perspective of the long-term forest stand and coarse woody debris dynamics associated with riparian areas.
Book Synopsis International Journal of Sediment Research by :
Download or read book International Journal of Sediment Research written by and published by . This book was released on 2008 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Canadian Geotechnical Journal by : National Research Council Canada
Download or read book Canadian Geotechnical Journal written by National Research Council Canada and published by . This book was released on 2003 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Debris-flow Hazards and Related Phenomena by : Matthias Jakob
Download or read book Debris-flow Hazards and Related Phenomena written by Matthias Jakob and published by Springer Science & Business Media. This book was released on 2007-12-26 with total page 795 pages. Available in PDF, EPUB and Kindle. Book excerpt: With climate change and deforestation, debris flows and debris avalanches have become the most significant landslide hazards in many countries. In recent years there have been numerous debris flow avalanches in Southern Europe, South America and the Indian Subcontinent, resulting in major catastrophes and large loss of life. This is therefore a major high-profile problem for the world's governments and for the engineers and scientists concerned. Matthias Jakob and Oldrich Hungr are ideally suited to edit this book. Matthias Jakob has worked on debris flow for over a decade and has had numerous papers published on the topic, as well as working as a consultant on debris flow for municipal and provincial governments. Oldrich Hungr has worked on site investigations on debris flow, avalanches and rockfall, with emphasis on slope stability analysis and evaluation of risks to roads in built-up areas. He has also developed mathematical models for landslide dynamic analysis. They have invited world-renowned experts to joint them in this book.
Book Synopsis Debris Flows/avalanches by : John E. Costa
Download or read book Debris Flows/avalanches written by John E. Costa and published by Geological Society of America. This book was released on 1987 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Debris flows and debris avalanches are among the most dangerous and destructive natural hazards that affect humans. They claim hundreds of lives and millions of dollars in property loss every year. These 17 papers pull together recent research into new methods for mitigating the loss of life and property.
Book Synopsis Effects of Agricultural Conservation Practices on Fish and Wildlife by : National Agricultural Library (U.S.)
Download or read book Effects of Agricultural Conservation Practices on Fish and Wildlife written by National Agricultural Library (U.S.) and published by . This book was released on 2008 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The bibliography is a guide to recent scientific literature covering effects of agricultural conservation practices on fish and wildlife. The citations listed here provide information on how conservation programs and practices designed to improve fish and wildlife habitat, as well as those intended for other purposes (e.g., water quality improvement), affect various aquatic and terrestrial fauna"--Abstract.
Book Synopsis Geomorphic Processes and Riverine Habitat by : American Geophysical Union. Meeting
Download or read book Geomorphic Processes and Riverine Habitat written by American Geophysical Union. Meeting and published by American Geophysical Union. This book was released on 2001-01-09 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Water Science and Application Series, Volume 4. Declines in fish populations and the loss of riverine habitat from human demands on the environment intensify year by year. By considering why and how, and by proposing restoration methods and mitigation strategies, scientists respond forcefully to improve disturbed ecosystems. Geomorphic Processes and Riverine Habitat presents results from recent research in fluvial geomorphology related to the assessment and characterization of riverine and riparian habitat, and the response of biota to changes in their environment. As our understanding of formative processes and how humans occupy and shape the environment grows, we can minimize our impact while enhancing our ability to restore and rehabilitate degraded river systems. For scientists, researchers and students of riverine habitat.
Book Synopsis Cumulative Effects of Forest Practices in Oregon by :
Download or read book Cumulative Effects of Forest Practices in Oregon written by and published by . This book was released on 1995 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Debris-flow Science and Practice by : Matthias Jakob
Download or read book Advances in Debris-flow Science and Practice written by Matthias Jakob and published by Springer Nature. This book was released on 2024 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zusammenfassung: This book provides a summary of the state of the art of all facets of debris-flow science and practice and is designed to be a comprehensive technical reference for practitioners and a state-of-the-art research overview for scientists. It is richly illustrated with equations, graphs, photos, and tables. The book allows students, practitioners, and regulators to get a sense of the current state of the art in this science. Currently, there are 2 to 3 papers published every week on some aspects of debris-flow science. This creates a bewildering amount of literature that cannot be captured by a single individual. This book provides a comprehensive overview of all facets to date, including initial hazard assessments, detailed quantitative risk assessments, debris-flow warning systems, debris-flow mitigation structure designs, and failures of mitigation works, as well as new topics such as climate change effects on debris flows
Book Synopsis Water/road Interaction Technology Series by :
Download or read book Water/road Interaction Technology Series written by and published by . This book was released on 1997 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research on Forest and Range Soils in Oregon and Washington by :
Download or read book Research on Forest and Range Soils in Oregon and Washington written by and published by . This book was released on 1981 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
