Estimation of Agricultural Pesticide Use in Drainage Basins Using Land Cover Maps and County Pesticide Data PDF Download
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Author:
Publisher: DIANE Publishing
ISBN: 1428906347
Category :
Languages : en
Pages : 56
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Book Description
Author:
Publisher: DIANE Publishing
ISBN: 1428906347
Category :
Languages : en
Pages : 56
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 55
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Book Description
A geographic information system (GIS) was used to estimate agricultural pesticide use in the drainage basins of streams that are studied as part of the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program. Drainage basin pesticide use estimates were computed by intersecting digital maps of drainage basin boundaries with an enhanced version of the National Land Cover Data 1992 combined with estimates of 1992 agricultural pesticide use in each United States county. This report presents the methods used to quantify agricultural pesticide use in drainage basins using a GIS and includes the estimates of atrazine use applied to row crops, small-grain crops, and fallow lands in 150 watersheds in the conterminous United States. Basin atrazine use estimates are presented to compare and analyze the results that were derived from 30-meter and 1-kilometer resolution land cover and county pesticide use data, and drainage basin boundaries at various grid cell resolutions. Comparisons of the basin atrazine use estimates derived from watershed boundaries, county pesticide use, and land cover data sets at different resolutions, indicated that overall differences were minor. The largest potential for differences in basin pesticide use estimates between those derived from the 30-meter and 1-kilometer resolution enhanced National Land Cover Data 1992 exists wherever there are abrupt agricultural land cover changes along the basin divide. Despite the limitations of the drainage basin pesticide use data described in this report, the basin estimates provide consistent and comparable indicators of agricultural pesticide application in surface-water drainage basins studied in the NAWQA Program.
Author: Naomi Nakagaki
Publisher:
ISBN:
Category : Atrazine
Languages : en
Pages :
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Book Description
Author: Charles W. Schalk
Publisher:
ISBN:
Category : Pesticides
Languages : en
Pages : 24
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Book Description
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 358
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Book Description
Author: Gail P. Thelin
Publisher: CreateSpace
ISBN: 9781500495749
Category : Technology & Engineering
Languages : en
Pages : 62
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Book Description
A method was developed to calculate annual county- level pesticide use for selected herbicides, insecticides, and fungicides applied to agricultural crops grown in the conterminous United States from 1992 through 2009. Pesticide-use data compiled by proprietary surveys of farm operations located within Crop Reporting Districts were used in conjunction with annual harvested-crop acreage reported by the U.S. Department of Agriculture National Agricultural Statistics Service (NASS) to calculate use rates per harvested- crop acre, or an 'estimated pesticide use' (EPest) rate, for each crop by year. Pesticide-use data were not available for all Crop Reporting Districts and years. When data were unavailable for a Crop Reporting District in a particular year, EPest extrapolated rates were calculated from adjoining or nearby Crop Reporting Districts to ensure that pesticide use was estimated for all counties that reported harvested-crop acreage. EPest rates were applied to county harvested-crop acreage differently to obtain EPest-low and EPest-high estimates of pesticide-use for counties and states, with the exception of use estimates for California, which were taken from annual Department of Pesticide Regulation Pesticide Use Reports.
Author:
Publisher:
ISBN:
Category : Nutrient pollution of water
Languages : en
Pages : 190
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Book Description
Author: Carol J. Becker
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 46
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Book Description
Author: IAHS International Commission on Continental Erosion. Symposium
Publisher: Iahs Press
ISBN:
Category : Science
Languages : en
Pages : 644
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Book Description
Author:
Publisher:
ISBN:
Category : Estuarine pollution
Languages : en
Pages : 144
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Book Description
