Abstract: Due to the serious shortage of water resources in TuHa Basin, Xinjiang, groundwater has become the main water resources; therefore, studying hydrogeochemical characteristics of the groundwater is very important for the development and protection of regional groundwater. By using the methods of Piper diagram, stable hydrogen and oxygen isotopes, Gibbs graph and ion correlation analysis, the hydrochemical characteristics and evolution were analyzed in the paper. The results showed that the recharge source of groundwater mainly came from the atmospheric precipitation and the evaporation was the main discharge way in TuHa Basin. The groundwater chemical compositions were mainly formed by lixiviation and evaporation. Hydrochemical type gradually evolved from the Cl·SO4Na to ClNa along the groundwater flow path. The evolution of the groundwater chemical components had high consistency and obvious enrichment phenomenon in the study region.

Key words: groundwater, hydrogeochemistry, distribution characteristic, isotope, TuHa Basin