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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 682
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Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 682
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Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 688
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 308
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Book Description
Author: Society of American Foresters. Convention
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 438
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Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 156
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Book Description
Author: Wade Glen Wells
Publisher:
ISBN:
Category : Sediment transport
Languages : en
Pages : 6
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Book Description
Two types of small (30-cm aperture) sheet metal sediment traps were developed to monitor onslope surface sediment transport. Traditionally, sediment traps and erosion pins have been used to measure the onslope movement of surficial soil material. While pins may be appropriate for documentinglandscapedenudation, traps aremoresuitable for monitoring downslope transport parallel to the ground surface. Previous investigations used large (3-m aperture) traps to measure sediment transport. However, large aperture traps are cumbersome and require excessive amounts of time and energy for installation, sample collection, and sample processing. These serious logistical constraints make data acquisition difficult and expensive. The small traps were designed to remedy this situation. Reld tests of these small traps revealed variable patterns of spatial and temporal surficial debris movement obscured in previous studies. Although these traps are not without limitations, the improved sampling logistics allow greater sample sizes andconstituteamarkedimprovement over other transport measurement techniques.
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 804
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Book Description
Author: Mark S. Wigmosta
Publisher: American Geophysical Union
ISBN:
Category : Nature
Languages : en
Pages : 246
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Book Description
Presents recent data on how forest management activities and urbanization have influenced the hydrologic and geomorphic responses of watersheds. Focusing on the Pacific Northwest, the 12 contributions discuss wetland processes, channel disturbance, changes in hydrology, and susceptibility to landslides in cities, and consider the effects of timber harvesting and road construction on stream flow, sediment yield, and erosion. Field studies of paired experimental/manipulated watersheds, plot studies, and spatially distributed models are provided. No index. c. Book News Inc.
Author:
Publisher: DIANE Publishing
ISBN: 1437941532
Category :
Languages : en
Pages : 72
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Book Description
Author: Peter R. Robichaud
Publisher:
ISBN:
Category : Forest fires
Languages : en
Pages : 72
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Book Description
This synthesis of post-fire treatment effectiveness reviews the past decade of research, monitoring, and product development related to post-fire hillslope emergency stabilization treatments, including erosion barriers, mulching, chemical soil treatments, and combinations of these treatments. In the past ten years, erosion barrier treatments (contour-felled logs and straw wattles) have declined in use and are now rarely applied as a post-fire hillslope treatment. In contrast, dry mulch treatments (agricultural straw, wood strands, wood shreds, etc.) have quickly gained acceptance as effective, though somewhat expensive, post-fire hillslope stabilization treatments and are frequently recommended when values-at-risk warrant protection. This change has been motivated by research that shows the proportion of exposed mineral soil (or conversely, the proportion of ground cover) to be the primary treatment factor controlling post-fire hillslope erosion. Erosion barrier treatments provide little ground cover and have been shown to be less effective than mulch, especially during short-duration, high intensity rainfall events. In addition, innovative options for producing and applying mulch materials have adapted these materials for use on large burned areas that are inaccessible by road. Although longer-term studies on mulch treatment effectiveness are on-going, early results and short-term studies have shown that dry mulches can be highly effective in reducing post-fire runoff and erosion. Hydromulches have been used after some fires, but they have been less effective than dry mulches in stabilizing burned hillslopes and generally decompose or degrade within a year.
