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http://dx.doi.org/10.3741/JKWRA.2009.42.1.9

Enhancement of Coupling between Soil Water and Groundwater in Integrated SWAT-MODFLOW Model  

Kim, Nam-Won (Korea Institute of Construction Technology)
Lee, Jeong-Woo (Korea Institute of Construction Technology)
Chung, Il-Moon (Korea Institute of Construction Technology)
Won, Yoo-Seung (River Information Center of Han River Flood Control Office)
Publication Information
Journal of Korea Water Resources Association / v.42, no.1, 2009 , pp. 9-19 More about this Journal
Abstract
This study presents the effects of temporally varied groundwater table on hydrological components such as surface runoff, evapotranspiration, and soil water content. To this end, the SWAT-MODFLOW model in which the groundwater module of SWAT is replaced with MODFLOW model has been used with a modification to enhance the coupling between the water content in soil profile and the groundwater in shallow aquifer. The variable soil layer construction technique (VSLT) is developed in the present work to represent the direct interaction of soil water and groundwater more realistically, and then the VSLT is incorporated into SWAT-MODFLOW model. In VSLT, when the simulated groundwater table rises within the soil zone, the soil layers below the water table is regarded as a portion of the shallow aquifer, so that those layers are excluded from the initially defined soil zone and are governed by the MODFLOW. From the simulation tests for the Musim river basin, the improved SWAT-MODFLOW model with VSLT is found to correctly evaluate the spatial distributions of overland flow, soil moisture, evapotranspiration according to the groundwater table variation.
Keywords
hydrological components; SWAT-MODFLOW; interaction of soil water and groundwater; VSLT;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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