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[1]JIANG Meng,TIAN Peng,MU Xingmin,et al.Spatiotemporal Variation and Attribution Analysis of Sediment Load in Jialing River Basin[J].Research of Soil and Water Conservation,2023,30(02):116-121,128.[doi:10.13869/j.cnki.rswc.2023.02.030]

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Spatiotemporal Variation and Attribution Analysis of Sediment Load in Jialing River Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 02 Page number: 116-121,128 Column: Public date: 2023-03-10

Title:: Spatiotemporal Variation and Attribution Analysis of Sediment Load in Jialing River Basin

Author(s):: JIANG Meng¹, TIAN Peng^1,2, MU Xingmin^1,3, ZHAO Guangju^1,3; (1.Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.College of Nature Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; 3.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China)

Keywords:: sediment transport modulus; temporal and spatial variation; influencing factors; Jialing River Basin

CLC:: P333

DOI:: 10.13869/j.cnki.rswc.2023.02.030

Abstract:: The variation of river sediment transport process is of great significance to the function of river system. Therefore, exploring the temporal and spatial changes of sediment transport and its driving factors in the Jialing River Basin plays an important guiding role in the further governance of the Jialing River Basin. Based on the measured rainfall and sediment transport data in the Jialing River Basin, the temporal and spatial variation characteristics of sediment transport were analyzed by Mann-Kendall trend test and Petitt mutation test, and the double mass curve was used to quantitatively analyze the contribution rate of climate change and human activities to sediment transport change at hydrological sites in typical intervals. The results showed that: the overall trend of sediment transport modulus in each sub-basin of Jialing River Basin decreased; from 2007 to 2015, the sediment transport modulus in the Wudu—Bikou interval alone was as high as 3 323.48 t/(km²·a); from 1960 to 2015, the sediment transport volume of Beibei, Wusheng, Luoduxi and Xiaoheba stations in the typical interval showed a very significant downward trend, decreasing at the rates of 3.40×10⁶, 1.80×10⁶, 4.0×10⁵, 3.40×10⁵t/a, respectively, and the contribution rate of human activities to sediment reduction based on soil and water conservation and hydraulic engineering measures was 75.93%～96.43%, and the sediment transport sequence underwent very significant mutations in 1990, 1990, 1988 and 1984 respectively. The overall trend of the chronological sediment transport modulus of each sub-basin of the Jialing River Basin was decreasing, and the impact of the construction of multiple large control reservoirs on the main stream on the river sediment transport was particularly obvious, and the Wudu-Bikou interval should be regarded as the key control area of soil erosion in the future.

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Last Update: 2023-03-10