Metamodels and Nonpoint Pollution Policy in Agriculture

dc.contributor.author Bouzaher, Aziz
dc.contributor.author Lakshminarayan, P.
dc.contributor.author Carriquiry, Alicia
dc.contributor.author Cabe, Richard
dc.contributor.author Carriquiry, Alicia
dc.contributor.author Gassman, Philip
dc.contributor.author Shogren, Jason
dc.contributor.department Center for Agricultural and Rural Development
dc.date 2018-02-16T11:41:29.000
dc.date.accessioned 2020-06-30T01:02:31Z
dc.date.available 2020-06-30T01:02:31Z
dc.date.embargo 2015-06-05
dc.date.issued 1992-08-01
dc.description.abstract <p>Informed debate on agricultural nonpoint pollution requires evaluation of regional water quality in relation to management practices. It is prohibitive, in terms of cost and time, to run the site-specific process models for regional policy analysis. Therefore, a simplified and robust technique--metamodeling--is suggested to evaluate regional water quality. Data from an experimentally designed simulation of complex surface water and groundwater process models, PRZM and STREAM, are used to develop statistically validated metamodels. The estimated metamodels were integrated with a regional agricultural economic decision making model to evaluate the surface water and groundwater loadings of 16 major corn and sorghum herbicides. Spatial probability distributions are derived for herbicide concentrations exceeding the toxicity-weighted benchmark from the EPA. We estimate that 1.2 percent of the regional soils will lead to groundwater detection of atrazine exceeding 0.12 ?/L, which compares well with the findings of the EPA's groundwater monitoring survey. We find no-till practices to significantly reduce the surface water concentration of atrazine and other herbicides with less impact on groundwater contamination suggesting indirect gains to soil conservation policies. But we also note that an atrazine ban could lead to increased soil erosion, even with the conservation compliance provisions fully incorporated.</p>
dc.identifier archive/lib.dr.iastate.edu/card_workingpapers/140/
dc.identifier.articleid 1126
dc.identifier.contextkey 7186592
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath card_workingpapers/140
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/12455
dc.source.bitstream archive/lib.dr.iastate.edu/card_workingpapers/140/92wp97.pdf|||Fri Jan 14 20:11:39 UTC 2022
dc.subject.disciplines Agricultural and Resource Economics
dc.subject.disciplines Agricultural Economics
dc.subject.disciplines Economics
dc.subject.disciplines Environmental Policy
dc.subject.disciplines Natural Resource Economics
dc.subject.disciplines Water Resource Management
dc.title Metamodels and Nonpoint Pollution Policy in Agriculture
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 6ddd5891-2ad0-4a93-89e5-8c35c28b0de4
relation.isOrgUnitOfPublication 1a6be5f1-4f64-4e48-bb66-03bbcc25c76d
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