The Spatiotemporal Evolution Characteristics of Agricultural Non-Point Source Pollution in the Lower Reaches of the Qinhe River. - Li, Hao Yang; Zhang, Zhan Fei; Shahzad, Asim; Xie, Shao Hua; Wen, Mei Qi; Wu, Hao; Qin, Ming Zhou (Polish Journal of Environmental Studies, 2026)