Runoff Variation and Influencing Factors in the Kuye River Basin of the Middle Yellow River

In recent decades, due to climate change and human activities, the hydrological processes of many rivers in world have undergone significant changes. As an important part water cycle, it is great practical significance identify causes runoff for resource management planning. Taking Kuye River its tributaries, Wulanmulun Beiniuchuan as examples, trend was investigated by Mann-Kendall test mutation analysis, contribution influencing factors quantitatively evaluated Budyko framework. The results showed that annual depth basin basin, a decreasing from 1960 2014 ( p < 0.01), rates were 1.03 mm/a, 1.24 mm/a 1.50 respectively. abrupt point upstream occurred 1996, while another tributary, 1992. contributions underlying surface 89.03, 89.54, 95.42%, respectively, followed rainfall, potential evapotranspiration lowest. (the Grain Green Project coal mining) main factor causing decrease basin.