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Does Harvest In West Slope Douglas Fir Increase Peak Flow In Small Forest Streams
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Book Synopsis Does Harvest in West Slope Douglas-fir Increase Peak Flow in Small Forest Streams? by : Jack Rothacher
Download or read book Does Harvest in West Slope Douglas-fir Increase Peak Flow in Small Forest Streams? written by Jack Rothacher and published by . This book was released on 1973 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Logging in the Douglas-fir has only minor effect on major peak streamflows which occur when soils are thoroughly wet. Exceptions are the early fall storms following the dry summers characteristic of the west coast climate. At this time, peak streamflow from unlogged areas may be less than in the harvested area because the soil in the unlogged area is drier and has greater moisture storage capacity than in the harvested area. These early fall storms rarely result in major peak streamflow.
Book Synopsis Hydrology of Small Forest Streams in Western Oregon by : Robert Dennis Harr
Download or read book Hydrology of Small Forest Streams in Western Oregon written by Robert Dennis Harr and published by . This book was released on 1976 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hydrology of small forest streams in western Oregon varies by time and space in terms of both streamflow and channel hydraulics. Overland flow rarely occurs on undisturbed soils. Instead, water is transmitted rapidly through soils to stream channels by displacement of stored soil water. Drainage networks expand and contract according to the interaction between precipitation characteristics and soil's capability to store and transmit water. Drainage networks are more extensive in winter than in summer. Streamflow may he 1,000 to 5,000 times greater during winter storms than during summer low flow. A stream's kinetic energy varies along with streamflow. Channel width and depth, heterogeneity of bed materials, and the accumulation of large, organic debris affects the dissipation of kinetic energy. Clearcutting can increase relatively small peak flows, but forest roads and extensive areas of soil compacted by other means may increase larger peak flows. Both roadbuilding and clearcutting can cause soil mass movements, which can drastically alter a stream's channel hydraulics by adding debris or scouring the charnel to bedrock. Removal of naturally occurring organic debris that has become part of a stable channel can accelerate bed and bank erosion.
Book Synopsis Effects of Forest Practices on Peak Flows and Consequent Channel Response by : Gordon E. Grant
Download or read book Effects of Forest Practices on Peak Flows and Consequent Channel Response written by Gordon E. Grant and published by DIANE Publishing. This book was released on 2010-09 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes a database of relevant studies reporting peak flow data across rain-, transient-, and snow-dominated hydrologic zones. Provides a quantitative comparison of changes in peak flow across both a range of flows and forest practices. Increases in peak flows generally diminish with decreasing intensity of percentage of watershed harvested and lengthening recurrence intervals of flow. Peak flow effects on channel morphology should be confined to stream reaches where channel gradients are less than 0.02 and streambeds are composed of gravel and finer material. Managers should evaluate the potential risk of peak flow increases based on factors such as presence of roads, specific mgmt. treatments employed, and watershed drainage efficiency.
Book Synopsis Effects of Forest Practices on Peak Flows and Consequent Channel Response by : Gordon Grant
Download or read book Effects of Forest Practices on Peak Flows and Consequent Channel Response written by Gordon Grant and published by . This book was released on 2008 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a state-of-the-science synthesis of the effects of forest harvest activities on peak flows and channel morphology in the Pacific Northwest, with a specific focus on western Oregon and Washington. We develop a database of relevant studies reporting peak flow data across rain-, transient-, and snow-dominated hydrologic zones, and provide a quantitative comparison of changes in peak flow across both a range of flows and forest practices. Increases in peak flows generally diminish with decreasing intensity of percentage of watershed harvested and lengthening recurrence intervals of flow. Watersheds located in the rain-dominated zone appear to be less sensitive to peak flow changes than those in the transient snow zone; insufficient data limit interpretations for the snow zone. Where present, peak flow effects on channel morphology should be confined to stream reaches where channel gradients are less than approximately 0.02 and streambeds are composed of gravel and finer material. We provide guidance as to how managers might evaluate the potential risk of peak flow increases based on factors such as presence of roads, watershed drainage efficiency, and specific management treatments employed. The magnitude of effects of forest harvest on peak flows in the Pacific Northwest, as represented by the data reported here, are relatively minor in comparison to other anthropogenic changes to streams and watersheds.
Book Synopsis Lumber Yield from Western White Pine in Northern Idaho by : Marlin E. Plank
Download or read book Lumber Yield from Western White Pine in Northern Idaho written by Marlin E. Plank and published by . This book was released on 1979 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research Publications of the H.J. Andrews Experimental Forest, Cascade Range, Oregon, 1948 to 1986 by :
Download or read book Research Publications of the H.J. Andrews Experimental Forest, Cascade Range, Oregon, 1948 to 1986 written by and published by . This book was released on 1987 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of a Rainfall-runoff Model for Simulating Effects of Forest Management on Streamflow in the East Fork Lobster Creek Basin, Oregon by : Lenore Y. Nakama
Download or read book Use of a Rainfall-runoff Model for Simulating Effects of Forest Management on Streamflow in the East Fork Lobster Creek Basin, Oregon written by Lenore Y. Nakama and published by . This book was released on 1993 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis General Technical Report PNW-GTR by :
Download or read book General Technical Report PNW-GTR written by and published by . This book was released on 1987 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water-resources Investigations Report by :
Download or read book Water-resources Investigations Report written by and published by . This book was released on 1995 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forest practices and streamflow in western Oregon by : Robert Dennis Harr
Download or read book Forest practices and streamflow in western Oregon written by Robert Dennis Harr and published by . This book was released on 1976 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest management activities, including roadbuilding, clearcut logging, and broadcast burning, can change certain portions of the forest hydrologic cycle. Watershed studies and other hydrologic research in the Coast and western Cascade Ranges of Oregon have shown that these changes may increase annual water yield up to 62 centimeters, double minimum flows in summer, and increase fall peak flows up to 200 percent and small winter peak flows up to 45 percent in small watersheds. Changes in streamflow resulting from clearcut logging had little effect on either onsite damage to stream channels and hydraulic structures or downstream flooding when yarding caused only light disturbance of soil. By increasing the size of larger peak flows, roadbuilding and soil compaction may cause onsite damage in small, headwater basins. Increases in annual yield and minimum flows may be substantial on small watersheds that are clearcut; under sustained yield forest management, such increases are masked in large, parent watersheds by unaltered streamflow from unlogged watersheds.
Book Synopsis USDA Forest Service General Technical Report PNW. by :
Download or read book USDA Forest Service General Technical Report PNW. written by and published by . This book was released on 1977 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forest and Range Soils Research in Oregon and Washington by :
Download or read book Forest and Range Soils Research in Oregon and Washington written by and published by . This book was released on 1976 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: An annotated bibliography supplementing bibliographies by Tarrant for 1956 through 1963 and by Klock for 1969 through 1974.
Book Synopsis Eastside Salem 10-year Timber Management by :
Download or read book Eastside Salem 10-year Timber Management written by and published by . This book was released on 1983 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Siskiyou National Forest (N.F.), Chetco-Greyback Planning Unit (OR,CA) by :
Download or read book Siskiyou National Forest (N.F.), Chetco-Greyback Planning Unit (OR,CA) written by and published by . This book was released on 1979 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Changes in Streamflow Following Timber Harvest in Southwestern Oregon by : Robert Dennis Harr
Download or read book Changes in Streamflow Following Timber Harvest in Southwestern Oregon written by Robert Dennis Harr and published by . This book was released on 1979 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tongass National Forest (N.F.), Ketchikan Pulp Company Long-term Timber Sale Contract, Polk Inlet by :
Download or read book Tongass National Forest (N.F.), Ketchikan Pulp Company Long-term Timber Sale Contract, Polk Inlet written by and published by . This book was released on 1995 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forest Harvest, Residue Treatment, Reforestation and Protection of Water Quality by : James M. Montgomery, Consulting Engineers
Download or read book Forest Harvest, Residue Treatment, Reforestation and Protection of Water Quality written by James M. Montgomery, Consulting Engineers and published by . This book was released on 1976 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: A state-of-the-art reference on the protection of water quality in planning and conducting forest harvest, residue treatment, and regeneration operations based largely on data collected in Region X which includes Alaska. Intended to be an aid for dealing with pollution from nonpoint sources.
