Hydrochemical Characteristics and Quality Evaluation of Irrigation and Drinking Water in Bangong Co Lake Watershed in Northwest Tibetan Plateau

Bangong Lake is a narrow and long lake in the arid region of plateau northern Tibet. The salinity east different from that west, resulting differences natural environment human living conditions on each side. Watershed hydrochemical analysis spatial statistical can help to understand regional evolution water quality evaluation. In this study, characteristics surface (glacier, river, lake) groundwater Co were investigated reveal relationships between various bodies. drinking index (DWQI) USSL classification applied assess suitability for agricultural purposes. show among bodies their distribution. analyzed samples, such as river glaciers, mainly Ca-HCO3-type was categorized Na-Cl-type with some Na-HCO3-Cl type. water’s chemical components are affected by evaporative karst decomposition. main mineralization process related dissolution reservoir minerals, dolomite calcite, well halite. indicates 79% samples study area good enough drinking. terms irrigation quality, electrical conductivity (EC), calculated sodium adsorption ratio (SAR), magnesium hazardous (MHR) showed more than 13% total not suitable irrigation. However, indicated glacier relatively Additionally, has very high alkalinity or salinity, which alarming when considering them