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Assessing groundwater vulnerability to agrichemical contamination in the Midwest US

Identifieur interne : 000D03 ( Istex/Corpus ); précédent : 000D02; suivant : 000D04

Assessing groundwater vulnerability to agrichemical contamination in the Midwest US

Auteurs : Michael R. Burkart ; Dana W. Kolpin ; David E. James

Source :

RBID : ISTEX:7D440E897E4745001A0BA6E71DF3142C83DB57E5

English descriptors

Abstract

Agrichemicals (herbicides and nitrate) are significant sources of diffuse pollution to groundwater. Indirect methods are needed to assess the potential for groundwater contamination by diffuse sources because groundwater monitoring is too costly to adequately define the geographic extent of contamination at a regional or national scale. This paper presents examples of the application of statistical, overlay and index, and process-based modeling methods for groundwater vulnerability assessments to a variety of data from the Midwest U.S. The principles for vulnerability assessment include both intrinsic (pedologic, climatologic, and hydrogeologic factors) and specific (contaminant and other anthropogenic factors) vulnerability of a location. Statistical methods use the frequency of contaminant occurrence, contaminant concentration, or contamination probability as a response variable. Statistical assessments are useful for defining the relations among explanatory and response variables whether they define intrinsic or specific vulnerability. Multivariate statistical analyses are useful for ranking variables critical to estimating water quality responses of interest. Overlay and index methods involve intersecting maps of intrinsic and specific vulnerability properties and indexing the variables by applying appropriate weights. Deterministic models use process-based equations to simulate contaminant transport and are distinguished from the other methods in their potential to predict contaminant transport in both space and time. An example of a one-dimensional leaching model linked to a geographic information system (GIS) to define a regional metamodel for contamination in the Midwest is included.

Url:
DOI: 10.1016/S0273-1223(99)00042-6

Links to Exploration step

ISTEX:7D440E897E4745001A0BA6E71DF3142C83DB57E5

Le document en format XML

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<ce:label>Aller et al., 1987</ce:label>
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<ce:given-name>J.H.</ce:given-name>
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<ce:given-name>R.J.</ce:given-name>
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<ce:given-name>G.</ce:given-name>
<ce:surname>Hackett</ce:surname>
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</sb:authors>
<sb:title>
<sb:maintitle>DRASTIC: A Standardized System for Evaluating Ground Water Pollution Potential Using Hydrogeologic Settings</sb:maintitle>
</sb:title>
</sb:contribution>
<sb:host>
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<sb:maintitle>EPA-600/2-87-035</sb:maintitle>
</sb:title>
<sb:date>1987</sb:date>
<sb:publisher>
<sb:name>U.S. Environmental Protection Agency</sb:name>
<sb:location>Ada, Oklahoma</sb:location>
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</sb:host>
</sb:reference>
</ce:bib-reference>
<ce:bib-reference id="bib2">
<ce:label>Biradar and Rayburn, 1995</ce:label>
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<sb:title>
<sb:maintitle>Chromosomal damage induced by herbicide contamination at concentrations observed in public water supplies</sb:maintitle>
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<sb:maintitle>J. Envir. Qual.</sb:maintitle>
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<sb:volume-nr>24</sb:volume-nr>
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</sb:reference>
</ce:bib-reference>
<ce:bib-reference id="bib3">
<ce:label>Bouzaher et al., 1993</ce:label>
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<ce:given-name>A.</ce:given-name>
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</sb:author>
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<title>Assessing groundwater vulnerability to agrichemical contamination in the Midwest US</title>
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<title>Assessing groundwater vulnerability to agrichemical contamination in the Midwest US</title>
</titleInfo>
<name type="personal">
<namePart type="given">Michael R.</namePart>
<namePart type="family">Burkart</namePart>
<affiliation>National Soil Tilth Laboratory, 2150 Pammel Drive, Ames, IA 50011, USA</affiliation>
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<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">Dana W.</namePart>
<namePart type="family">Kolpin</namePart>
<affiliation>US Geological Survey, 400 South Clinton Street, Iowa City, IA 52244, USA</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal">
<namePart type="given">David E.</namePart>
<namePart type="family">James</namePart>
<affiliation>National Soil Tilth Laboratory, 2150 Pammel Drive, Ames, IA 50011, USA</affiliation>
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<abstract lang="en">Agrichemicals (herbicides and nitrate) are significant sources of diffuse pollution to groundwater. Indirect methods are needed to assess the potential for groundwater contamination by diffuse sources because groundwater monitoring is too costly to adequately define the geographic extent of contamination at a regional or national scale. This paper presents examples of the application of statistical, overlay and index, and process-based modeling methods for groundwater vulnerability assessments to a variety of data from the Midwest U.S. The principles for vulnerability assessment include both intrinsic (pedologic, climatologic, and hydrogeologic factors) and specific (contaminant and other anthropogenic factors) vulnerability of a location. Statistical methods use the frequency of contaminant occurrence, contaminant concentration, or contamination probability as a response variable. Statistical assessments are useful for defining the relations among explanatory and response variables whether they define intrinsic or specific vulnerability. Multivariate statistical analyses are useful for ranking variables critical to estimating water quality responses of interest. Overlay and index methods involve intersecting maps of intrinsic and specific vulnerability properties and indexing the variables by applying appropriate weights. Deterministic models use process-based equations to simulate contaminant transport and are distinguished from the other methods in their potential to predict contaminant transport in both space and time. An example of a one-dimensional leaching model linked to a geographic information system (GIS) to define a regional metamodel for contamination in the Midwest is included.</abstract>
<subject lang="en">
<genre>Keywords</genre>
<topic>Groundwater</topic>
<topic>nitrate</topic>
<topic>pesticides</topic>
<topic>aquifers</topic>
<topic>agriculture</topic>
<topic>GIS</topic>
</subject>
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<title>Water Science and Technology</title>
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<title>JWST</title>
</titleInfo>
<name type="conference">
<namePart>Integrated Management of Water Quality: The Role of Agricultural Diffuse Pollution Sources, Teolo, Padua, Italy</namePart>
<namePart type="date">19970511</namePart>
<namePart type="date">19970516</namePart>
</name>
<genre type="journal">journal</genre>
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<dateIssued encoding="w3cdtf">1999</dateIssued>
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<identifier type="ISSN">0273-1223</identifier>
<identifier type="PII">S0273-1223(00)X0003-0</identifier>
<part>
<date>1999</date>
<detail type="issue">
<title>Integrated Management of Water Quality: The Role of Agricultural Diffuse Pollution Sources, Teolo, Padua, Italy</title>
</detail>
<detail type="volume">
<number>39</number>
<caption>vol.</caption>
</detail>
<detail type="issue">
<number>3</number>
<caption>no.</caption>
</detail>
<extent unit="issue pages">
<start>1</start>
<end>157</end>
</extent>
<extent unit="pages">
<start>103</start>
<end>112</end>
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<identifier type="DOI">10.1016/S0273-1223(99)00042-6</identifier>
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<identifier type="ArticleID">99000426</identifier>
<accessCondition type="use and reproduction" contentType="copyright">©1999 International Association on Water Quality</accessCondition>
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