疏勒河流域径流量和输沙量变化规律.

[Objective] The aims of this study are to explore the variation law of the long-term measured runoff and sediment load series, and to provide scientific support for the implementation of the western ecological security strategy by the country. [Methods] The linear trend estimation and moving average, Mann Kendall nonparametric test method, wavelet analysis method, were applied to analyze the measured data of annual runoff and sediment load series at Changmapu, Panjiazhuang, and Dangchengwan stations in the Shule River Basin. [Results](1) Both the annual runoff and sediment discharge of Shule River basin was increasing, however, the increasing trend of runoff was more significant than sediment discharge. The annual runoff of Changmapu, Panjiazhuang, and Dangchengwan stations had an obvious turning point in 1999, 2016 and 1982, respectively. The annual sediment discharge of Dangchengwan did not have sudden changes, and the sudden changes in the annual sediment discharge of Changmapu and Panjiazhuang all occurred in 1998.(2) The runoff and sediment discharge of the three representative stations in the Shule River basin all showed the evolution characteristics of multiple time scales. Wavelet analysis indicated periodicities of 58 years, 31 years, 14 years, 9 years and 5 years for annual runoff and periodicities of 48 years, 23 years, 14 years, 7 years and 5 years for annual sediment load in Changmapu. There were periodicities of 59 years, 32 years and 14 years for annual runoff and periodicities of 37 years, 14 years, 8 years and 5 years for annual sediment load in Panjiazhuang station. There were periodicities of 42 years and 5 years for annual runoff and periodicities of 16 years and 8 years for annual sediment load in Dangcheng station. [Conclusion] The overall trend of water and sediment in the Shule River Basin is increasing, and there is a significant periodic change. Except for the sediment transport in Dangchengwan, all other stations have sudden changes in water and sediment transport. Moreover, the sudden change in sediment transport at the same hydrological station lags behind the sudden change in runoff. [ABSTRACT FROM AUTHOR]