[1]Ma Daoming,Hui Yiying,Zhao Jiongchang,et al.Spatiotemporal Characteristics of Rainfall Erosivity in Shanxi Province in Recent 60 Years[J].Research of Soil and Water Conservation,2023,30(06):24-31,48.[doi:10.13869/j.cnki.rswc.2023.06.023]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 06
Page number:
24-31,48
Column:
Public date:
2023-10-10
- Title:
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Spatiotemporal Characteristics of Rainfall Erosivity in Shanxi Province in Recent 60 Years
- Author(s):
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Ma Daoming1, Hui Yiying1, Zhao Jiongchang1, Wang Baiqun3, Yu Yang1,2
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(1.School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China; 2.Jixian National Forest Ecosystem Observation and Research Station, CNERN, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China; 3.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS&MWR, Yangling, Shaanxi 712100, China)
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- Keywords:
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rainfall erosivity; spatiotemporal characteristics; Shanxi Province; soil erosion
- CLC:
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S157.1
- DOI:
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10.13869/j.cnki.rswc.2023.06.023
- Abstract:
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[Objective] The aims of this study are to reveal the potential capacity of regional soil erosion triggered by rainfall, to analyze the spatial and temporal characteristics of rainfall erosivity, and to provide scientific and technological support for regional ecological construction and soil erosion management. [Methods] Based on the homogenized daily precipitation data of Shanxi meteorological stations in recent 60 years(1960—2020), we analyzed the change trend and spatiotemporal distribution characteristics of annual rainfall erosivity in Shanxi Province by means of linear regression, Mann-Kendall nonparametric test, Hurst test and spatial interpolation. The spatiotemporal variation of rainfall erosivity of Shanxi Province in recent 60 years was discussed. [Results] The variation range of annual average rainfall erosivity in Shanxi Province from 1960 to 2020 was 828.29 to 3 002.21 MJ·mm/(hm2·h), with an average value of 1 667.05 MJ·mm/(hm2·h), minimum value occurring in 1997, maximum value occurring in 1964. The interannual variation trend of rainfall erosivity at each station was significantly different, rainfall erosivity at Wutaishan Station showed a significant downward trend. Except for rainfall erosivity at Houma station, rainfall erosivity at all other stations showed a decreasing trend, and the Hurst index was higher than 0.5, indicating that the decreasing trend continued in the long term. The spatial distribution of multi-year average rainfall erosion force in Shanxi Province showed the characteristics of high level in the southeast and low level in the northwest, and there was a positive correlation between rainfall erosion force and elevation. [Conclusion] In most areas of Shanxi Province, rainfall erosivity showed a decreasing trend, while the region along the Yellow River, an increasing trend was detected. The ecological construction and comprehensive control of soil and water loss along the Yellow River region of Shanxi Province should be further strengthened.