The water diversion-transportation-drainage-return had become the dominant regional hydrological processes in Qingtongxia irrigation area. For the reason of systematically mastering water cycle rules of Qingtongxia irrigation area, this study chose MIKE SHE distributed hydrological model with physical basis to build water-cycle model of Qingtongxia irrigation area, calculated the parameters with data of underground water level and drainage flow from 2007 to 2009, and validated the parameters with same data from 2010 to 2012. Using this model, this study simulated and analyzed the conversion relationship of different water cycle factors in Qingtongxia irrigation area. The results shown that annual average evapotranspiration was 3.537 billion m³ , total drainage ditches flow was about 2.832 billion m³ , and the groundwater runoff into Yellow River was about 55 million m³ . This study firstly quantitative clarified the relationship between recharge and discharge of Qingtongxia irrigation area and the Yellow River. These will lay the foundation for studying the water circulation evolution mechanism and water resources efficient utilization under changing environment.
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