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[1]WANG Wei,LI Zhanbin,YANG Rui,et al.Temporal and Spatial Variation Characteristics of Annual Runoff Erosion Power in Wuding River Basin[J].Research of Soil and Water Conservation,2020,27(01):26-32.

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Temporal and Spatial Variation Characteristics of Annual Runoff Erosion Power in Wuding River Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 27 Number of periods: 2020 01 Page number: 26-32 Column: Public date: 2020-02-20

Title:: Temporal and Spatial Variation Characteristics of Annual Runoff Erosion Power in Wuding River Basin

Author(s):: WANG Wei¹, LI Zhanbin^1,2, YANG Rui³, JIA Lu¹, REN Zongping¹, LI Peng¹; (1.State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an 710048, China; 2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and ministry of Water Resources, Yangling,Shaanxi 712100, China; 3.College of Architecture Engineering, Yan’an University, Yan’an, Shaanxi 716000, China)

Keywords:: runoff erosion energy; erosion sediment transport; scale effect; runoff erosion power

CLC:: S157

DOI:: -

Abstract:: The relationship between runoff erosion and sediment transport at different scales is not clear and needs to be studied deeply. In order to study the temporal and spatial characteristics of runoff erosion and sediment transport, we analyzed the annual runoff erosion power and annual runoff in the Wuding River Basin from 1956 to 2010 based on the Mann-Kendall method and the linear regression method. The Mann-Kendall mutation test was used to identify the year of runoff and the annual runoff erosion power, and to analyze the annual runoff before and after the mutation year. The annual runoff erosion-power correlation model was established. From 1956 to 2010, the annual runoff and annual runoff erosion power of the Wuding River Basin decreased significantly, and the runoff mutation years were between 1971 and 1985. The average standard deviation of annual runoff erosion power before the mutation year was higher than that after the mutation year. The average annual runoff erosion power was 1.05 * 10^-4m⁴ /(s · km²)before the mutation year, and the annual runoff erosion power decreased with the increases of the watershed area. The correlation between the runoff erosion power and sediment transport model was significant(p<0.01). This study shows that the annual runoff erosion power in the Wuding River Basin has the decreasing trend and decreases with the increase of the basin area. The runoff erosion power theory can predict the runoff erosion and sediment transport relationship on the annual scale.

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Last Update: 2020-02-25