Research on runoff variation trend and hydrological situation variation in Wujiang River Basin

Abstract This paper selected the Wujiang River Basin as the study area, and restored the runoff process at Wulong station through complicated calculation. By using Mann-Kendall, Kendall rank correlation test and other test methods, there was no significant trend for the runoff in the Wujiang River Basin. The RVA method was applied to analyze the influence degree for the existing cascade reservoir operation on the hydrological regime of the Wujiang River, and it was concluded that the overall hydrologic indicators alteration degree of Wulong Station was high. By simulating the operation scenarios of the cascade reservoirs, future hydrological regime alteration of Wulong station was predicted. Compared with the current situation of Wulong station, the results showed that the inflow will decrease in flood season, and the inflow will increase in dry season.