Research on the Water Quality Characteristics and Development Suitability of High-Strontium-rich Groundwater in Qianxinan Prefecture

To scientifically support the refined development of characteristic groundwater resources in karst mountainous areas, 18 high strontium-rich groundwater sites (strontium content à 1.0mg/L) in Qianxinan Prefecture were taken as the research objects to systematically analyze their water quality characteristics and development suitability. The results show that strontium content ranges from 1.127 to 11.010mg/L (average 4.23mg/L), mainly occurring in the dolomite and dolomitic limestone of the Guanling Formation and Yelang Formation of the Triassic; The water quality was mainly Class III (83.3%), with only the ammonia nitrogen in the old house gene in the south of Xingren City exceeding Class IV. The water chemical types were mainly HCO3 -CA and HCO3 -CA · Mg (91.7%), pH 7.68-8.19, total hardness 257-363mg/L, meeting the standards for drinking natural mineral water. Based on water quality, strontium content and development conditions, three suitable areas were classified, with five preferred suitable development sites including Dujiajing in Afternoon tun, Xingyi City. The research results provide technical support for the precise development of high strontium-rich groundwater in Qianxinan Prefecture and also offer a reference for similar karst areas.