SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Water quality control options in response to catchment urbanization: A scenario analysis by SWAT 
Authors:Nguyen, H.H., F. Recknagel and W. Meyer 
Volume (Issue):10 
Article ID:1846 
URL (non-DOI journals): 
Broad Application Category:hydrologic and pollutant 
Primary Application Category:land use change 
Secondary Application Category:BMP and/or cropping system assessment 
Watershed Description:River Torrens drainage area up to the Gorge Weir (Urban Torrens drainage area), located in the city of Adelaide in southeast South Australia, Australia. 
Calibration Summary: 
Validation Summary: 
General Comments: 
Abstract:Urbanization poses a challenge to sustainable catchment management worldwide. This study compares streamflows and nutrient loads in the urbanized Torrens catchment in South Australia at present and future urbanization levels, and addresses possible mitigation of urbanization effects by means of the control measures: river bank stabilization, buffer strip expansion, and wetland construction. A scenario analysis by means of the Soil and Water Assessment Tool (SWAT) based on the anticipated urban population density growth in the Torrens catchment over the next 30 years predicted a remarkable increase of streamflow and Total Phosphorous loads but decreased Total Nitrogen loads. In contrast, minor changes of model outputs were predicted under the present urbanization scenario, i.e. urban area expansion on the grassland. Scenarios of three feasible control measures demonstrated best results for expanding buffer zone to sustain stream water quality. The construction of wetlands along the Torrens River resulted in the reduction of catchment runoff, but only slight decreases in TN and TP loads. Overall, the results of this study suggested that combining the three best management practices by the adaptive development of buffer zones, wetlands and stabilized river banks might help to control efficiently the increased run-off and TP loads by the projected urbanization of the River Torrens catchment. 
Keywords:SWAT; urbanization; nutrient loads; constructed wetlands; buffer zones; river bank stabilization