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COMPARISON OF PROCESS‐BASED AND ARTIFICIAL NEURAL NETWORK APPROACHES FOR STREAMFLOW MODELING IN AN AGRICULTURAL WATERSHED

Identifieur interne : 000D85 ( Istex/Corpus ); précédent : 000D84; suivant : 000D86

COMPARISON OF PROCESS‐BASED AND ARTIFICIAL NEURAL NETWORK APPROACHES FOR STREAMFLOW MODELING IN AN AGRICULTURAL WATERSHED

Auteurs : Puneet Srivastava ; James N. Mcnair ; Thomas E. Johnson

Source :

RBID : ISTEX:8775A3F0DD767F6955B269FBD268014235FD572E

English descriptors

Abstract

ABSTRACT: The performance of the Soil and Water Assessment Tool (SWAT) and artificial neural network (ANN) models in simulating hydrologic response was assessed in an agricultural watershed in southeastern Pennsylvania. All of the performance evaluation measures including Nash‐Sutcliffe coefficient of efficiency (E) and coefficient of determination (R2) suggest that the ANN monthly predictions were closer to the observed flows than the monthly predictions from the SWAT model. More specifically, monthly streamflow E and R2 were 0.54 and 0.57, respectively, for the SWAT model calibration period, and 0.71 and 0.75, respectively, for the ANN model training period. For the validation period, these values were −0.17 and 0.34 for the SWAT and 0.43 and 0.45 for the ANN model. SWAT model performance was affected by snowmelt events during winter months and by the model's inability to adequately simulate base flows. Even though this and other studies using ANN models suggest that these models provide a viable alternative approach for hydrologic and water quality modeling, ANN models in their current form are not spatially distributed watershed modeling systems. However, considering the promising performance of the simple ANN model, this study suggests that the ANN approach warrants further development to explicitly address the spatial distribution of hydrologic/water quality processes within watersheds.

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DOI: 10.1111/j.1752-1688.2006.tb04475.x

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ISTEX:8775A3F0DD767F6955B269FBD268014235FD572E

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<abstract>ABSTRACT: The performance of the Soil and Water Assessment Tool (SWAT) and artificial neural network (ANN) models in simulating hydrologic response was assessed in an agricultural watershed in southeastern Pennsylvania. All of the performance evaluation measures including Nash‐Sutcliffe coefficient of efficiency (E) and coefficient of determination (R2) suggest that the ANN monthly predictions were closer to the observed flows than the monthly predictions from the SWAT model. More specifically, monthly streamflow E and R2 were 0.54 and 0.57, respectively, for the SWAT model calibration period, and 0.71 and 0.75, respectively, for the ANN model training period. For the validation period, these values were −0.17 and 0.34 for the SWAT and 0.43 and 0.45 for the ANN model. SWAT model performance was affected by snowmelt events during winter months and by the model's inability to adequately simulate base flows. Even though this and other studies using ANN models suggest that these models provide a viable alternative approach for hydrologic and water quality modeling, ANN models in their current form are not spatially distributed watershed modeling systems. However, considering the promising performance of the simple ANN model, this study suggests that the ANN approach warrants further development to explicitly address the spatial distribution of hydrologic/water quality processes within watersheds.</abstract>
<note type="content">*Paper No. 04021 of the Journal of the American Water Resources Association (JAWRA)</note>
<subject lang="en">
<genre>keywords</genre>
<topic>surface water hydrology</topic>
<topic>models</topic>
<topic>Soil and Water Assessment Tool (SWAT)</topic>
<topic>streamflow</topic>
<topic>runoff</topic>
<topic>base flow</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>JAWRA Journal of the American Water Resources Association</title>
</titleInfo>
<genre type="journal">journal</genre>
<identifier type="ISSN">1093-474X</identifier>
<identifier type="eISSN">1752-1688</identifier>
<identifier type="DOI">10.1111/(ISSN)1752-1688</identifier>
<identifier type="PublisherID">JAWR</identifier>
<part>
<date>2006</date>
<detail type="volume">
<caption>vol.</caption>
<number>42</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>3</number>
</detail>
<extent unit="pages">
<start>545</start>
<end>563</end>
<total>19</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">8775A3F0DD767F6955B269FBD268014235FD572E</identifier>
<identifier type="DOI">10.1111/j.1752-1688.2006.tb04475.x</identifier>
<identifier type="ArticleID">JAWR545</identifier>
<recordInfo>
<recordContentSource>WILEY</recordContentSource>
<recordOrigin>Blackwell Publishing Ltd</recordOrigin>
</recordInfo>
</mods>
</metadata>
<serie></serie>
</istex>
</record>

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