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[1]LI Tianyi,YU Kunxia,LI Zhanbin,et al.Variation Characteristics and Driving Factors of Sediment Concentration in Sandy Region of the Loess Plateau[J].Research of Soil and Water Conservation,2023,30(04):203-209.[doi:10.13869/j.cnki.rswc.2023.04.007.]

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Variation Characteristics and Driving Factors of Sediment Concentration in Sandy Region of the Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 04 Page number: 203-209 Column: Public date: 2023-06-10

Title:: Variation Characteristics and Driving Factors of Sediment Concentration in Sandy Region of the Loess Plateau

Author(s):: LI Tianyi^1,2, YU Kunxia^1,2, LI Zhanbin^1,2, LI Peng^1,2, JIA Lu^1,2, YANG Zhi³,Zhang Guojun³,Wei Xiaoyan³; (1.State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China; 2.Key Laboratory of Ecological Hydrology and Disaster Prevention in Arid Regions, National Forestry Administration, Xi'an University of Technology, Xi'an 710048, China; 3.Ningxia Soil and Water Conservation Monitoring Station, Yinchuan 750002, China)

Keywords:: sediment concentration; correlation analysis; ecological construction measures

CLC:: P333.4

DOI:: 10.13869/j.cnki.rswc.2023.04.007.

Abstract:: [Objective] The aim of this study is to reveal the variation law of sediment and sediment concentration in the Loess Plateau, clarify the influencing factors on sediment concentration, and provide some scientific bases for soil erosion control and ecological protection in the basin. [Methods] Based on the sediment transport data of Huangfuchuan, Gushanchuan, Tuwei, Kuye and Wuding River basins from 1956 to 2010, the temporal and spatial variation characteristics of sediment concentration in the coarse sediment region were analyzed by using Mann-Kendall trend test, Pettitt change point test and Morlet wavelet analysis. The correlation between sediment concentration and ecological construction measures was explored by Pearson correlation coefficient. [Results](1)From 1956 to 2010, the sediment transports in the study area showed significant decreasing trends, but the sediment concentrations in the Huangfuchuan, Gushanchuan and Wuding river basins showed significant increasing trends.(2)The sediment concentration in Gushanchuan and Wuding River basins had significant abrupt change(p<0.05)in the years of 1990 and 1986, respectively.(3)The main cycle of sediment concentration in the study area was 15～55 years.(4)Runoff concentration had a great impact on sediment concentration in the study area. In addition, the area of ecological construction measures had a significant positive correlation with sediment concentration, and terrace, afforestation and grass planting had the greatest influence on sediment concentration in the study area. [Conclusion] In the Loess Plateau, the amount of sediment is gradually reduced and more and more concentrated. The concentration of sediment is affected by rainfall runoff and ecological construction measures.

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Last Update: 2023-06-10