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Fate and transport of agricultural c...

Coupe, Richard Henry, Jr.

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Fate and transport of agricultural chemicals in the Yazoo River Basin.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Fate and transport of agricultural chemicals in the Yazoo River Basin./
Author:	Coupe, Richard Henry, Jr.
Description:	165 p.
Notes:	Adviser: David R. Shaw.
Contained By:	Dissertation Abstracts International68-03B.
Subject:	Agriculture, Soil Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3256000

Fate and transport of agricultural chemicals in the Yazoo River Basin.
Coupe, Richard Henry, Jr.

Fate and transport of agricultural chemicals in the Yazoo River Basin. - 165 p.

Adviser: David R. Shaw.

Thesis (Ph.D.)--Mississippi State University, 2007.

The objectives of this research were to examine some representative surface waters in the Yazoo River Basin (YRB) during the growing season for a few selected herbicides; to compare the type and abundance of pesticides in the atmosphere at a agricultural and an urban site; to determine the load of nitrogen and phosphorus being discharged from the YRB to the Mississippi River and ultimately the Gulf of Mexico; to determine how the adsorptive properties of a common Delta soil differ under no-tillage (NT) versus conventional tillage (CT) for two commonly used herbicides; and to validate the Soil and Water Assessment Tool (SWAT) model for herbicide runoff in the YRB.Subjects--Topical Terms:

1017824
Agriculture, Soil Science.

Fate and transport of agricultural chemicals in the Yazoo River Basin.
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035 $a (UMI)AAI3256000
035 $a AAI3256000
040 $a UMI $c UMI
100 1 $a Coupe, Richard Henry, Jr. $3 1291330
245 1 0 $a Fate and transport of agricultural chemicals in the Yazoo River Basin.
300 $a 165 p.
500 $a Adviser: David R. Shaw.
500 $a Source: Dissertation Abstracts International, Volume: 68-03, Section: B, page: 1527.
502 $a Thesis (Ph.D.)--Mississippi State University, 2007.
520 $a The objectives of this research were to examine some representative surface waters in the Yazoo River Basin (YRB) during the growing season for a few selected herbicides; to compare the type and abundance of pesticides in the atmosphere at a agricultural and an urban site; to determine the load of nitrogen and phosphorus being discharged from the YRB to the Mississippi River and ultimately the Gulf of Mexico; to determine how the adsorptive properties of a common Delta soil differ under no-tillage (NT) versus conventional tillage (CT) for two commonly used herbicides; and to validate the Soil and Water Assessment Tool (SWAT) model for herbicide runoff in the YRB.
520 $a Herbicides, in low concentrations (generally less than 10 parts per billion) were frequently detected in 3 streams in the YRB throughout the growing season. Pesticides were detected in air and rain samples from both urban and agricultural areas. The concentrations in the agricultural area generally were an order of magnitude higher and types of pesticides detected were different: more insecticides in the urban area and more herbicides in the agricultural area. The annual load of nitrogen being contributed to the Mississippi River from the YRB was less than what might be expected based on discharge, and the load of phosphorus was slightly higher than what might be expected. The amount of atrazine and fluometuron adsorbed was similar for a soil under CT and NT, but much more herbicide was adsorbed by the NT soil. At the scale of the Bogue Phalia Basin (too large for specific information to be available and too small for averaging to eliminate the need for site specific data) there are considerable uncertainties associated with input data and these, together with the simplifying assumptions within the model, mean that SWAT should not be used to predict the exact date, time, and concentration of a pesticide in a stream. However, the model does offer the potential to assess the likelihood of contamination of surface waters by a given compound in a given situation and as such could provide a useful tool for planning, management and regulatory purposes.
590 $a School code: 0132.
650 4 $a Agriculture, Soil Science. $3 1017824
650 4 $a Biogeochemistry. $3 545717
650 4 $a Engineering, Agricultural. $3 1019504
650 4 $a Engineering, Environmental. $3 783782
650 4 $a Environmental Sciences. $3 676987
690 $a 0425
690 $a 0481
690 $a 0539
690 $a 0768
690 $a 0775
710 2 0 $a Mississippi State University. $3 1017550
773 0 $t Dissertation Abstracts International $g 68-03B.
790 $a 0132
790 1 0 $a Shaw, David R., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3256000