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Author: United States. Soil Conservation Service
Publisher:
ISBN:
Category : Sedimentation and deposition
Languages : en
Pages : 216
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Book Description
Author: United States. Soil Conservation Service
Publisher:
ISBN:
Category : Sedimentation and deposition
Languages : en
Pages : 216
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Book Description
Author: United States. Department of Agriculture
Publisher:
ISBN:
Category : California
Languages : en
Pages : 5
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Book Description
Author: United States. Soil Conservation Service. River Basin Planning Staff
Publisher:
ISBN:
Category : Sedimentation and deposition
Languages : en
Pages : 162
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Book Description
Author:
Publisher:
ISBN:
Category : Sediment control
Languages : en
Pages : 270
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Book Description
Author: Clifford Dickason
Publisher:
ISBN:
Category : Sedimentation and deposition
Languages : en
Pages : 128
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Book Description
Author: Sarah Elizabeth Gatzke
Publisher:
ISBN: 9781124318479
Category :
Languages : en
Pages :
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Book Description
Agricultural Best Management Practices (BMPs) have been employed for years as erosion reduction measures on cultivated lands. The ability to model the effects of BMPs at the watershed scale using a standardized process-based method provides watershed managers with an important decision making tool for addressing large-scale water quality concerns. This study uses a process-based BMP simulation method with the Soil and Water Assessment Tool (SWAT) to evaluate five BMPs including grassed waterways, channel stabilization structures, strip crops, cover crops and vegetative filter strips on almond orchards in northern California, USA. The sediment reduction rate of the five BMPs was compared to a base case where no BMPs were applied to the watershed and analyzed for several precipitation scenarios to compare BMP effectiveness. In-channel BMPs which included grassed waterways and channel stabilization structures, reduced sediment load at the watershed outlet by 8% to 14%, respectively, depending on the annual precipitation scenario. Grassed waterways consistently outperformed channel stabilization structures, reducing sediment load by an additional 2% to 5% compared to channel stabilization structures. Upland BMPs including strip crops, cover crops and vegetative filter strips reduced sediment yield by 15 to 100% for the various precipitation scenarios. For years with median and above median precipitation, strip crops were most effective, reducing sediment yield by 63% in both cases, whereas cover crops only reduced sediment yield by 54% and 15%, respectively. For the below median precipitation year, the cover crop reduced sediment yield from fields completely (100%), whereas strip crops and vegetative filter strips only reduced sediment load by 64% and 59%, respectively. For all BMPs, a positive correlation between sediment load/yield and increasing precipitation amount and intensity was observed. The methods presented in this study are easily applicable to watershed scale studies of other basins and for other water quality concerns, such as the fate and transport of agricultural pesticides and nutrients.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309172683
Category : Nature
Languages : en
Pages : 569
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Book Description
In 1997, New York City adopted a mammoth watershed agreement to protect its drinking water and avoid filtration of its large upstate surface water supply. Shortly thereafter, the NRC began an analysis of the agreement's scientific validity. The resulting book finds New York City's watershed agreement to be a good template for proactive watershed management that, if properly implemented, will maintain high water quality. However, it cautions that the agreement is not a guarantee of permanent filtration avoidance because of changing regulations, uncertainties regarding pollution sources, advances in treatment technologies, and natural variations in watershed conditions. The book recommends that New York City place its highest priority on pathogenic microorganisms in the watershed and direct its resources toward improving methods for detecting pathogens, understanding pathogen transport and fate, and demonstrating that best management practices will remove pathogens. Other recommendations, which are broadly applicable to surface water supplies across the country, target buffer zones, stormwater management, water quality monitoring, and effluent trading.
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 1198
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Book Description
Author:
Publisher: UCANR Publications
ISBN: 1601074417
Category :
Languages : en
Pages : 6
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Book Description
Specific steps you can take to minimize vineyard and orchard soil erosion and keep downstream waterways clean.
Author:
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 1212
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Book Description
