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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

TitleAdvancing representation of hydrologic processes in the Soil and Water Assessment Tool (SWAT) through integration of the TOPographic MODEL (TOPMODEL) features
Authors
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
Citation
Journal of Hydrology, 2012, v. 420-421, p. 319-328 How to Cite?
Abstract
This 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.
Persistent Identifierhttp://hdl.handle.net/10722/150650
ISSN
2013 Impact Factor: 2.693
2013 SCImago Journal Rankings: 1.713
ISI Accession Number ID
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.

References
Grants

 

Author Affiliations
  1. USGS Earth Resources Observation and Science Center
  2. The University of Hong Kong
DC FieldValueLanguage
dc.contributor.authorChen, Jen_US
dc.contributor.authorWu, Yen_US
dc.date.accessioned2012-06-26T06:06:27Z-
dc.date.available2012-06-26T06:06:27Z-
dc.date.issued2012en_US
dc.identifier.citationJournal of Hydrology, 2012, v. 420-421, p. 319-328en_US
dc.identifier.issn0022-1694en_US
dc.identifier.urihttp://hdl.handle.net/10722/150650-
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.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jhydrolen_US
dc.relation.ispartofJournal of Hydrologyen_US
dc.subjectBaseflowsen_US
dc.subjectSaturated fractionen_US
dc.subjectSurface runoffen_US
dc.subjectSwaten_US
dc.subjectTopmodelen_US
dc.titleAdvancing representation of hydrologic processes in the Soil and Water Assessment Tool (SWAT) through integration of the TOPographic MODEL (TOPMODEL) featuresen_US
dc.typeArticleen_US
dc.identifier.emailChen, J: jichen@hku.hken_US
dc.identifier.emailWu, Y: yipingwu@hku.hk-
dc.identifier.authorityChen, J=rp00098en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.jhydrol.2011.12.022en_US
dc.identifier.scopuseid_2-s2.0-84856234575en_US
dc.identifier.hkuros207937-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84856234575&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume420-421en_US
dc.identifier.spage319en_US
dc.identifier.epage328en_US
dc.identifier.isiWOS:000301082000027-
dc.publisher.placeNetherlandsen_US
dc.relation.projectExperimental and Numerical Studies of the Hydrological Features of Flash Floods in Hong Kong-
dc.identifier.scopusauthoridWu, Y=54883816100en_US
dc.identifier.scopusauthoridChen, J=16443980300en_US
dc.identifier.citeulike10158599-

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