The Influence of Yintao First-stage Project on Changes of Water Resources in Water-receiving Areas

In order to explore the effects of precipitation,potential evapotranspiration,runoff and groundwater in the water-receiving areas of Yintao First-stage Project,the water-receiving areas of Yintao First-stage Project in central Gansu Province are taken as study areas,remote sensing and WRF model are used to simulate precipitation and potential evapotranspiration in 2015,2017 and 2020 and the variation of runoff of Taohe River Basin,Zuli River Basin and groundwater level in Dingxi City regarded as typical water-receiving areas are analyzed based on the actual observation data. The results show a trend of first decrease and then increase in potential evapotranspiration while the trend of increase in the mountainous areas and winter since Yintao First-stage Project was operated. The discharge of rivers in water-receiving areas has a significant increasing trend and the groundwater-level is constantly changing and generally rises by 1～2.5 m. Overall,the results of this study will provide basic data and methods for further research on the impact of the Yintao Project on water resources in arid areas.