Water quality assessment in multi-salinity groundwater of muddy coastal zones using a function-adaptive weight water quality index - Qiming Sun; Xinyue Chang; Rui Xu; Xin Ji; Jianhe Yang; Hongwei Liu; Maosheng Gao; Guohua Hou; Zhenlin Liu; Xianmin Ke; Jie Dong (Journal of Contaminant Hydrology, 2026)