PROGRESS IN GEOGRAPHY ›› 2011, Vol. 30 ›› Issue (3): 335-342.doi: 10.11820/dlkxjz.2011.03.012

• Original Articles • Previous Articles     Next Articles

Research and Application of Interface and Frame Structure of SWAT and MODFLOW Models Coupling

CHU Jinggang, ZHANG Chi, ZHOU Huicheng   

  1. School of Hydraulic Engineering, Faculty of Infrastructure Engineering Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2010-05-01 Revised:2010-08-01 Online:2011-03-25 Published:2011-03-25

Abstract: In recent years, water resources are increasingly affecting the global development of environment and economy. The temporal and spatial changes of water resources are directly dependent on the cognition of hydrological cycle laws. Watershed is the basic unit of natural water circulation, and the basic system for water resources development and utilization, water environment preservation, and water resources allocation and utilization. Based on the determination of the standard period of hydrological variation, the restoration of the natural runoff under the impact of human activities by the use of hydrological model through hydrology simulations, the quantitative evaluation of the impact of climate changes and human activities on watershed water sources variation and the obtainment of responding regularity and mechanism of watershed water circulation to climate changes and human activities are hotspots of the present hydrology research. The most widely used hydrological models are SWAT and MODFLOW. The necessity of coupling SWAT and MODFLOW to do co-simulation of surface water and groundwater is analyzed first, and then the interface problems, such as unit conversion and frame structure in the two models coupling are studied primarily. Because the smallest computational units of SWAT and MODFLOW are hydrologic response units (HRUs) and cells respectively, the conversion between HRU and CELL, that is the interface of SWAT and MODFLOW models coupling, must be implemented first in the SWAT and MODFLOW models coupling. Therefore, an HRU-CELL conversion method under ArcSWAT2005 and the frame structure of SWAT-MODFLOW coupled model is given. The HRU-CELL conversion method is applied to the co-simulation of surface water and groundwater in Hunhe River and Taizi River basins, and the effectiveness of the SWAT-MODFLOW coupled model in the water cycle simulations of large watersheds is verified to lay the foundation for the quantitative evaluation of the impact of climate changes and human activities on watershed water sources variation and the obtainment of responding regularity and mechanism of watershed water circulation to climate changes and human activities.

Key words: frame structure, HRU-CELL conversion, interface, MODFLOW, SWAT