Download or read book Ground Freezing Effects on Soil Erosion of Army Training Lands Part 1 Initial Test Results written by and published by DIANE Publishing. This book was released on 1997 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Military maneuvers damage vegetation and compact and rut soils on training lands, thereby increasing the likelihood of hillslope runoff and soil erosion. Soil Freeze-Thaw (FT) processes can change the hydraulic geometry and roughness of vehicular ruts and reduce soil compaction, which often partially restores the water infiltration rate that existed before compaction. The efficiency of these FT-induced 'repairs' depends on soil water content and FT intensity. Initial tests showed that: (1) an experimental soil bin designed and constructed for rut experiments allows acceptable simulation of field soil FT, and (2) the hydraulic geometry of a rectangular rill in a fine silt soil with an initial volumetric water content of 36% changes dramatically due to rill sideslope slumping during thaw. Future experiments will compare differences in the response of natural rills and vehicular ruts to FT-induced soil failure, and investigate the effects of FT on soil erodibility and the influences of snow cover on soil erosion processes in the spring.
Download or read book Ground Freezing Effects on Soil Erosion of Army Training Lands Pt 1 written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1997 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Freezing Effects on Soil Erosion of Army Training Lands Part 1 Initial Test Results written by and published by . This book was released on 1997 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Military maneuvers damage vegetation and compact and rut soils on training lands, thereby increasing the likelihood of hillslope runoff and soil erosion. Soil Freeze-Thaw (FT) processes can change the hydraulic geometry and roughness of vehicular ruts and reduce soil compaction, which often partially restores the water infiltration rate that existed before compaction. The efficiency of these FT-induced 'repairs' depends on soil water content and FT intensity. Initial tests showed that: (1) an experimental soil bin designed and constructed for rut experiments allows acceptable simulation of field soil FT, and (2) the hydraulic geometry of a rectangular rill in a fine silt soil with an initial volumetric water content of 36% changes dramatically due to rill sideslope slumping during thaw. Future experiments will compare differences in the response of natural rills and vehicular ruts to FT-induced soil failure, and investigate the effects of FT on soil erodibility and the influences of snow cover on soil erosion processes in the spring.
Download or read book Ground Freezing Effects on Soil Erosion of Army Training Lands written by Lawrence W. Gatto and published by . This book was released on 1997 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Freezing Effects on Soil Erosion of Army Training Lands written by Lawrence W. Gatto and published by . This book was released on 1997 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Freezing Effects on Soil Erosion of Army Training Lands written by and published by . This book was released on 1998 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two areas were monitored at the Yakima Training Center (YTC) in central Washington to measure changes in M1A2 Abrams (M1) tank-rut surface geometry, and in- and out-of-rut saturated hydraulic conductivity (Ksubfs), soil penetration resistance (SPR), and bulk density over the 1995-1996 winter. Profile meter data show that rut cross-sectional profiles smoothed significantly and that turning ruts did so more than straight ruts. Rut edges were zones of erosion and sidewall bases were zones of deposition. Ksubfs values were similar in and out of ruts formed on soil with 0-5 percent water by volume, but were lower in ruts formed on soil with about 15 percent water. Mean SPR was similar in and out of ruts from 0- to 5-cm depth, increased to 2 MPa outside ruts and 4 MPa inside ruts at 10- to 15-cm depth, and decreased by 10-38 percent outside ruts and by 39-48% inside ruts at the 30-cm depth. Soil bulk density was similar in and out of ruts from 0- to 2.5-cm depth, and below 2.5 cm it was generally higher in ruts formed on moist soil, with highest values between 10- and 20-cm depth. Conversely, density in ruts formed on dry soil was similar to out-of-rut density at all depths. This information is important for determining impacts of tank ruts on water infiltration and soil erosion, and for modifying the Revised Universal Soil Loss Equation (RUSLE) and the Water Erosion Prediction Project (WEPP) models to more accurately predict soil losses on Army training lands.
Download or read book Modelling Soil Erosion Sediment Transport and Closely Related Hydrological Processes written by Wolfgang Summer and published by IAHS Press. This book was released on 1998 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1982 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Environmental Legacy of Military Operations written by Judy Ehlen and published by Geological Society of America. This book was released on 2001-01-01 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: U.S. military lands are part of the public trust and the level of awareness of sustainability and land-use issues has risen significantly in recent years. Ehlen (U.S. Army Engineer Research and Development Center) and Harmon (U.S. Army Research Office) present 14 articles that look at the use of engineering geology principles and their applications to both military operations and environmental issues, although military operations and the environment are not always treated together. Topics include battlefield terrain evaluation, predicting fracture systems in enemy underground facilities, the geoenvironmental legacy of the Rock of Gibraltar military engineering, and erosion trends at Fort Leonard Wood. Annotation c. Book News, Inc., Portland, OR (booknews.com)
Download or read book CRREL Bibliography written by and published by . This book was released on 1998 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Landscape Erosion and Evolution Modeling written by Russell S. Harmon and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Landscapes are characterized by a wide variation, both spatially and temporally, of tolerance and response to natural processes and anthropogenic stress. These tolerances and responses can be analyzed through individual landscape parameters, such as soils, vegetation, water, etc., or holistically through ecosystem or watershed studies. However, such approaches are both time consuming and costly. Soil erosion and landscape evolution modeling provide a simulation environment in which both the short- and long-term consequences of land-use activities and alternative land use strategies can be compared and evaluated. Such models provide the foundation for the development of land management decision support systems. Landscape Erosion and Evolution Modeling is a state-of-the-art, interdisciplinary volume addressing the broad theme of soil erosion and landscape evolution modeling from different philosophical and technical approaches, ranging from those developed from considerations of first-principle soil/water physics and mechanics to those developed empirically according to sets of behavioral or empirical rules deriving from field observations and measurements. The validation and calibration of models through field studies is also included. This volume will be essential reading for researchers in earth, environmental and ecosystem sciences, hydrology, civil engineering, forestry, soil science, agriculture and climate change studies. In addition, it will have direct relevance to the public and private land management communities.
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1975 with total page 1260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the International Symposium on Frozen Soil Impacts on Agricultural Range and Forest Lands Held at Spokane Washington on March 21 22 1990 written by and published by . This book was released on 1990 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: Partial Contents: Frozen Soil Impacts on Agricultural, Range, and Forest Lands-An Introduction; Frozen Soil, Runoff and Soil Erosion Research in Northeastern Oregon; Nature of the Cryic Thermal Regime of Agricultural Soils in the Yukon Territory, Canada; Soil Freezing in a Subarctic Deciduous Forest; Tillage and Crop Residue Effects of Soil Frost Depth; Comparison of Numerical Simulations with Experimental Data for a Prototype Artificial Ground Freezing; Effect of Freeze-Thaw Activity on Water Retention, Hydraulic Conductivity; Predicting Unfrozen Water Content Behavior Using Freezing Point Depression Data; Effects of Freezing on Aggregate Stability of Soils Differing in Texture, Mineralogy, and Organic Matter Content; Environmental Conditions and Processes Associated with Runoff From Frozen Soils at Reynolds Creek Watershed; and The Effect of Frozen Soil on Erosion-A Model Approach.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1985 with total page 1346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1991 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Backpacker written by and published by . This book was released on 2007-09 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Backpacker brings the outdoors straight to the reader's doorstep, inspiring and enabling them to go more places and enjoy nature more often. The authority on active adventure, Backpacker is the world's first GPS-enabled magazine, and the only magazine whose editors personally test the hiking trails, camping gear, and survival tips they publish. Backpacker's Editors' Choice Awards, an industry honor recognizing design, feature and product innovation, has become the gold standard against which all other outdoor-industry awards are measured.
Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1972-10 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
