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[1]Wei Xia,Yang Zhenghua,Zhang Zhenpeng,et al.Study on the Variation Characteristics of Runoff and Sediment in Shule River Basin[J].Research of Soil and Water Conservation,2024,31(01):144-150.[doi:10.13869/j.cnki.rswc.2024.01.016]

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Study on the Variation Characteristics of Runoff and Sediment in Shule River Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 01 Page number: 144-150 Column: Public date: 2024-02-20

Title:: Study on the Variation Characteristics of Runoff and Sediment in Shule River Basin

Author(s):: Wei Xia¹, Yang Zhenghua², Zhang Zhenpeng¹, Lu Zhiqiang¹, Sun Chao³, Wang Qiang², Mu Ji², Ma Chunxia²; (1.College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China; 2 Center of Soil and Water Conservation, Gansu Provincial Department of Water Resources, Lanzhou 730020, China; 3 Hydrological Station of Gansu Province, Lanzhou 730000, China)

Keywords:: Mann-Kendall test; wavelet analysis; runoff; sediment load; Shule River

CLC:: P333

DOI:: 10.13869/j.cnki.rswc.2024.01.016

Abstract:: [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.

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Last Update: 2024-02-20