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Journal of Arid Land
Journal of Arid Land
Research Articles     
Two-way coupling of unsaturated-saturated flow by integrating the SWAT and MODFLOW models with application in an irrigation district in arid region of West China
Yi LUO, Marios SOPHOCLEOUS
1 Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 2 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; 3 Kansas Geological Survey, University of Kansas, Lawrence, Kansas 66047, USA
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Abstract  This paper presents the realization of two-way coupling of the unsaturated-saturated flow interactions of the SWAT2000 and MODFLOW96 models on the basis of the integrated surface/groundwater model SWATMOD99, and its application in Hetao Irrigation District (HID), Inner Mongolia, China. Major revisions and enhancements were made to the SWAT2000 and MODFLOW models for simulating the detailed hydrologic budget and coupled unsaturated and saturated interactions, and irrigation canal hydrology for the HID. The simulation results of seasonal groundwater recharge to and evaporate from the shallow groundwater, and the annual water budget over the district are presented and discussed. The results implied the necessity of two-way coupling of the unsaturated-saturated interactions when groundwater is shallow, and the feasibility of making comprehensive use of the information coming from both the surface water and groundwater models to make a more physically-based assessment of the coupled interactions.

Key words： Holocene      climate variation      lake level      lake sediment      arid environment     
Received: 28 March 2011      Published: 07 September 2011
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Yi LUO
Marios SOPHOCLEOUS
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Yi LUO, Marios SOPHOCLEOUS. Two-way coupling of unsaturated-saturated flow by integrating the SWAT and MODFLOW models with application in an irrigation district in arid region of West China. Journal of Arid Land, 2011, 3(3): 164-173.

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http://jal.xjegi.com/10.3724/SP.J.1227.2011.00164     OR     http://jal.xjegi.com/Y2011/V3/I3/164

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