Erosion and Sedimentation Following Road Construction and Timber Harvest on Unstable Soils in Three Small Western Oregon Watersheds PDF Download
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Author: R. L. Fredriksen
Publisher:
ISBN:
Category : Forest roads
Languages : en
Pages : 22
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Book Description
Author: R. L. Fredriksen
Publisher:
ISBN:
Category : Forest roads
Languages : en
Pages : 22
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Book Description
Author: R. L. Fredriksen
Publisher: Forgotten Books
ISBN: 9780428588731
Category : Technology & Engineering
Languages : en
Pages : 28
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Book Description
Excerpt from Erosion and Sedimentation Following Road Construction and Timber Harvest on Unstable Soils in Three Small Western Oregon Watersheds Logging of old growth Douglas - fir timber by high-lead cable methods was completed during the Winter of 1962-63 on three clearcuts of 13, 20, and 28 acres. The logging removed timber from 25 percent of the watershed (fig. Logging debris was burned in September 1963. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: R. L. Fredriksen
Publisher:
ISBN:
Category : Erosion
Languages : en
Pages : 15
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Book Description
Author: Richard L. Fredriksen
Publisher:
ISBN:
Category : Sedimentation and deposition
Languages : en
Pages : 30
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Book Description
Author: R. L. Fredriksen
Publisher:
ISBN:
Category : Forest roads
Languages : en
Pages : 20
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Book Description
Author:
Publisher:
ISBN:
Category : Forest roads
Languages : en
Pages : 15
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Book Description
Author: Robert Dennis Harr
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 20
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Book Description
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.
Author: United States. Bureau of Land Management
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 496
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Book Description
Author: Walter F. Megahan
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 112
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Book Description
Author: James T. Krygier
Publisher:
ISBN:
Category : Clearcutting
Languages : en
Pages : 208
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Book Description
A number of studies were undertaken related to effects of clearcut logging on water quality and the process affected in small streams. Water temperature studied before and after logging was increased significantly where stream cover was removed. Energy balances of small streams were measured and predictive models were developed. Road building significantly increased sediment yield in clearcut and patch cut watersheds. Logging itself was not an important sediment contributor. Methods for sampling bed load and suspended sediment were developed. Bed load constituted 70 percent of suspended load during peak discharges.
