Abstract: Based on data of hydrogeology survey,hydrochemistry sample analyses,combined with remote sensing,14Cdating,water monitoring and many other kinds of methods,analyses of hydrological circulating systemin the Jiuzhaigou core scenic area are conducted in this paper.The study area is divided into the Rizhegou,Zezhawagou,Shuzhenggou and Danzhugou hydrologic subsystems.Cyclical changes in climate and precipitation occur in this study area,and the rocks and geological structures arestable.Wat...