SWAT Literature Database for Peer-Reviewed Journal Articles

Title:SWAT2009_LUC: A tool to activate the land use change module in SWAT 2009 
Authors:Pai, N. and D. Saraswat 
Journal:Transactions of the ASABE 
Article ID: 
URL (non-DOI journals):http://baegrisk.ddns.uark.edu/SWAT_Model_Tools/SWAT2009_LUC/docs/2011_Pai_SWAT2009_LUC.pdf 
Broad Application Category:hydrologic only 
Primary Application Category:GIS interface, GIS utility, or other type of interface/utility 
Secondary Application Category:land use change 
Watershed Description:1,963 Illinois River in northwest Arkansas 
Calibration Summary: 
Validation Summary: 
General Comments: 
Abstract:In watersheds, where land-use/land-cover change takes place over the modeling period, using a single land- use geospatial data is not a true representation of the watershed condition. Hence, SWAT2009_LUC, a computer-based, geospatial tool, was developed that ingests multiple land- use/land-cover geospatial datasets and other associated information interactively and updates the Land-Use Change (LUC) module in the latest release of the Soil and Water Assessment Tool (SWAT 2009) model. The geospatial tool was tested in an urbanizing watershed in Northwest Arkansas, U.S.A, by using three temporal land-use geospatial data layers acquired during 1999, 2004, and 2006. The results show that the land use distribution generated by the tool was consistent with the input land-use layer for each year and was updated correctly during the model run. Model simulations with and without the activation of LUC module showed that groundwater was under predicted by up to 15%, while surface runoff was over-predicted by up to 13% at the subwatershed-scale when a single land-use geospatial dataset was used. Overall, the results showed that activating LUC module using SWAT2009_LUC tool improves spatial and temporal hydrological responses from the SWAT 2009 model. 
Keywords:Change, Geospatial, Hydrology, Interface, Land use, Modeling, SWAT