Nonpoint source pollution modeling of an agricultural watershed within a geographic information system

dc.contributor.advisor Udoyara Sunday Tim
dc.contributor.author Liao, Hsiu-Hua
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-08-23T10:35:24.000
dc.date.accessioned 2020-06-30T07:15:33Z
dc.date.available 2020-06-30T07:15:33Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 1996
dc.date.issued 1996
dc.description.abstract <p>Despite the many strides made in the past two decades, nonpoint source (NPS) pollution continues to be an important environment management and water quality management problem. For the most part, analysis of NPS pollution in watersheds has depended on the use of lumped mathematical models to identify potential problem areas and to assess the effectiveness of alternative management practices. To effectively use models to analyze NPS pollution at the watershed-scale, resource managers and researchers have depended on the geographic information system (GIS) technology to determine input parameters and display output from models. There have also been numerous attempts to link GIS with lumped models to extend both the scope and scale of the analysis. The primary goal of this research is to use GIS to facilitate the analysis of water quality problems. A number of integrated modeling environments were developed either by tightly coupling models with GIS or embedding the entire modeling equations inside the GIS, taking advantage of the high-level data structure of the GIS. In one modeling environment, an interactive user interface was developed by tightly coupling the Agricultural Nonpoint Source Pollution model (AGNPS) with ARC/INFO GIS. In another, an interactive water quality modeling environment which incorporated and embed several physical-base/process-base equations for simulating NPS pollution within ARC/INFO GIS was developed. Compared with traditional methods of watershed water quality modeling, the unique GIS modeling environment is far more efficient, saves time, and significantly reduces the tedious task of watershed analysis of nonpoint source pollution.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/11764/
dc.identifier.articleid 12763
dc.identifier.contextkey 6510237
dc.identifier.doi https://doi.org/10.31274/rtd-180813-10694
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/11764
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/65057
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/11764/r_9725477.pdf|||Fri Jan 14 18:57:41 UTC 2022
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.disciplines Environmental Engineering
dc.subject.disciplines Hydrology
dc.subject.keywords Agricultural and biosystems engineering
dc.subject.keywords Agricultural engineering
dc.title Nonpoint source pollution modeling of an agricultural watershed within a geographic information system
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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