Research on the Hydrological Variation Law of the Dawen River, a Tributary of the Lower Yellow River

The natural runoff mechanism of the Dawen River, main tributary lower Yellow has been stressed in recent years as a result human activity, and hydrological situation changed dramatically. In this paper, various statistical methods such Mann–Kendall nonparametric test, cumulative anomaly, ordered clustering, sliding T rainfall–runoff double-cumulative curve were used to study evolution characteristics factors River. revealed that rainfall River decreased overall from 1956 2016, but downward trend was not clear, variance high, with 1978 variation point. IHA/RVA PCA comprehensively evaluate variability nine representative indicators screened out. change 58%, which is mild, difference between IHA index system just 7%, predictable. undergone huge changes, there serious dry-off phenomenon since 1978. biology, habitat, structure have all irreversibly impacted by changes its regime. Furthermore, key influencing aspect vast building water conservation schemes. findings could serve theoretical foundation for integrated resource management ecological conservation.