Environmental isotope characteristics and groundwater recharge in groundwater level rise area in Zhangye City

Using the testing data of constant environmental isotopes(2H、3H、180、14C) and the CFC measure-year technology,on the regional hydr-geology conditions,the paper systematically analysed environmental isotope character and relating extent of each other of atmospheric rainfall,glacier-snow water,mountains bedrock crevice water(spring),surface water,fountain in groundwater level rise area and groundwater(phreatic water,shallow press groundwater and deep press groundwater) in Zhangye basin and upper reaches.Moreover,using the Mass Conservation Law and CFC measure-year technology,roughly estimated the composition and replenishment years of groundwater resources,and discussed the sources and ways of replenishment of deep press groundwater in groundwater level rise area.The research results have definite reference significances for a fresh understand to the deep press groundwater at the arid areas in inland basin,especially for understand of the sources of replenishment and drainage ways of groundwater,and for rational exploiting and using water resources.