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Article: Advancing representation of hydrologic processes in the Soil and Water Assessment Tool (SWAT) through integration of the TOPographic MODEL (TOPMODEL) features
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TitleAdvancing representation of hydrologic processes in the Soil and Water Assessment Tool (SWAT) through integration of the TOPographic MODEL (TOPMODEL) features
 
AuthorsChen, J2
Wu, Y2 1
 
KeywordsBaseflows
Saturated fraction
Surface runoff
Swat
Topmodel
 
Issue Date2012
 
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jhydrol
 
CitationJournal of Hydrology, 2012, v. 420-421, p. 319-328 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.jhydrol.2011.12.022
 
AbstractThis paper presents a study of the integration of the Soil and Water Assessment Tool (SWAT) model and the TOPographic MODEL (TOPMODEL) features for enhancing the physical representation of hydrologic processes. In SWAT, four hydrologic processes, which are surface runoff, baseflow, groundwater re-evaporation and deep aquifer percolation, are modeled by using a group of empirical equations. The empirical equations usually constrain the simulation capability of relevant processes. To replace these equations and to model the influences of topography and water table variation on streamflow generation, the TOPMODEL features are integrated into SWAT, and a new model, the so-called SWAT-TOP, is developed. In the new model, the process of deep aquifer percolation is removed, the concept of groundwater re-evaporation is refined, and the processes of surface runoff and baseflow are remodeled. Consequently, three parameters in SWAT are discarded, and two new parameters to reflect the TOPMODEL features are introduced. SWAT-TOP and SWAT are applied to the East River basin in South China, and the results reveal that, compared with SWAT, the new model can provide a more reasonable simulation of the hydrologic processes of surface runoff, groundwater re-evaporation, and baseflow. This study evidences that an established hydrologic model can be further improved by integrating the features of another model, which is a possible way to enhance our understanding of the workings of catchments. © 2011 Elsevier B.V.
 
ISSN0022-1694
2013 Impact Factor: 2.693
2013 SCImago Journal Rankings: 1.713
 
DOIhttp://dx.doi.org/10.1016/j.jhydrol.2011.12.022
 
ISI Accession Number IDWOS:000301082000027
Funding AgencyGrant Number
Hong Kong RGC GRFHKU 711008E
HKU710910E
Funding Information:

This research was supported by two Hong Kong RGC GRF projects (HKU 711008E and HKU710910E). The authors are grateful for the valuable review comments and suggestions from two anonymous reviewers.

 
ReferencesReferences in Scopus
 
GrantsExperimental and Numerical Studies of the Hydrological Features of Flash Floods in Hong Kong
 
DC FieldValue
dc.contributor.authorChen, J
 
dc.contributor.authorWu, Y
 
dc.date.accessioned2012-06-26T06:06:27Z
 
dc.date.available2012-06-26T06:06:27Z
 
dc.date.issued2012
 
dc.description.abstractThis paper presents a study of the integration of the Soil and Water Assessment Tool (SWAT) model and the TOPographic MODEL (TOPMODEL) features for enhancing the physical representation of hydrologic processes. In SWAT, four hydrologic processes, which are surface runoff, baseflow, groundwater re-evaporation and deep aquifer percolation, are modeled by using a group of empirical equations. The empirical equations usually constrain the simulation capability of relevant processes. To replace these equations and to model the influences of topography and water table variation on streamflow generation, the TOPMODEL features are integrated into SWAT, and a new model, the so-called SWAT-TOP, is developed. In the new model, the process of deep aquifer percolation is removed, the concept of groundwater re-evaporation is refined, and the processes of surface runoff and baseflow are remodeled. Consequently, three parameters in SWAT are discarded, and two new parameters to reflect the TOPMODEL features are introduced. SWAT-TOP and SWAT are applied to the East River basin in South China, and the results reveal that, compared with SWAT, the new model can provide a more reasonable simulation of the hydrologic processes of surface runoff, groundwater re-evaporation, and baseflow. This study evidences that an established hydrologic model can be further improved by integrating the features of another model, which is a possible way to enhance our understanding of the workings of catchments. © 2011 Elsevier B.V.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationJournal of Hydrology, 2012, v. 420-421, p. 319-328 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.jhydrol.2011.12.022
 
dc.identifier.citeulike10158599
 
dc.identifier.doihttp://dx.doi.org/10.1016/j.jhydrol.2011.12.022
 
dc.identifier.epage328
 
dc.identifier.hkuros207937
 
dc.identifier.isiWOS:000301082000027
Funding AgencyGrant Number
Hong Kong RGC GRFHKU 711008E
HKU710910E
Funding Information:

This research was supported by two Hong Kong RGC GRF projects (HKU 711008E and HKU710910E). The authors are grateful for the valuable review comments and suggestions from two anonymous reviewers.

 
dc.identifier.issn0022-1694
2013 Impact Factor: 2.693
2013 SCImago Journal Rankings: 1.713
 
dc.identifier.scopuseid_2-s2.0-84856234575
 
dc.identifier.spage319
 
dc.identifier.urihttp://hdl.handle.net/10722/150650
 
dc.identifier.volume420-421
 
dc.languageeng
 
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jhydrol
 
dc.publisher.placeNetherlands
 
dc.relation.ispartofJournal of Hydrology
 
dc.relation.projectExperimental and Numerical Studies of the Hydrological Features of Flash Floods in Hong Kong
 
dc.relation.referencesReferences in Scopus
 
dc.subjectBaseflows
 
dc.subjectSaturated fraction
 
dc.subjectSurface runoff
 
dc.subjectSwat
 
dc.subjectTopmodel
 
dc.titleAdvancing representation of hydrologic processes in the Soil and Water Assessment Tool (SWAT) through integration of the TOPographic MODEL (TOPMODEL) features
 
dc.typeArticle
 
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Author Affiliations
  1. USGS Earth Resources Observation and Science Center
  2. The University of Hong Kong