Study region: The midstream of the Hei River Basin (HRB). Study focus: The study investigated the changes in hydrological elements at different time scales in the basin from 1982 to 2020. We used the Budyko coupled balance equation to quantitatively assess the contributions of climate change and human activity-induced land surface changes to runoff during different periods. https://www.bekindtopets.com/quick-find-Premio-Tab-7-1-limited-choice/