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[1]CHEN Jiannan,LIU Yilin,LI Pengfei,et al.Spatiotemporal Changes of Rainfall Erosivity on the Loess Plateau During 1901—2016[J].Research of Soil and Water Conservation,2022,29(04):39-46.

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Spatiotemporal Changes of Rainfall Erosivity on the Loess Plateau During 1901—2016

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 04 Page number: 39-46 Column: Public date: 2022-06-20

Title:: Spatiotemporal Changes of Rainfall Erosivity on the Loess Plateau During 1901—2016

Author(s):: CHEN Jiannan¹, LIU Yilin¹, LI Pengfei¹, HU Jinfei¹, GAO Jianjian², DANG Tianmin³; (1.College of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, China; 2.Suide Test Station of Soil and Water Conservation, Yellow River Conservancy Committee of Ministry of Water Resources, Yulin, Shaanxi 719000, China; 3.Yellow River Basin Monitoring Center of Water-Soil Conservation and Eco-Environment, Xi'an 710021, China)

Keywords:: rainfall erosivity; Loess Plateau; spatiotemporal changes; century scale; soil erosion

CLC:: S157.1

DOI:: -

Abstract:: In order to study the centennial scale(i. e. throughout the 20th century)rainfall erosivity across the Loess Plateau, the accuracy of the CHELSAcrust data set was verified firstly. The rainfall erosivity was estimated using monthly precipitation data from the CHELSAcrust dataset. Finally, the spatiotemporal pattern of rainfall erosivity was assessed. The results show that:(1)the accuracy of the CHELSAcrust precipitation dataset is satisfactory(Nash coefficient=0.79; R²=0.82), which meets the requirements of a long-term analysis;(2)The average annual rainfall erosivity of the Loess Plateau was high in the southeast and low in the northwest, and the order of rainfall erodibility in different geographical regions of the Loess Plateau was rocky mountainous region>Fen-Wei river valley>hilly and gully loess region>high plain of Loess Plateau>deserts>Hetao alluvial plains; the significant changes of rainfall erosivity concentrated in the central region of the Loess Plateau, while the insignificant changes distributed in the marginal areas;(3)during 1901—2016, no significant changes or abrupt change points were found in the rainfall erosivity of the Loess Plateau; the changes of the rainfall erosivity could be categorized into three stages which were 1901—1930, 1930—1980 and 1980—2016;(4)the variation of rainfall erosivity on the Loess Plateau was periodicity, and the most significant change periodicity was found to be 2.62 years, and the periodicity of rainfall erosivity was basically consistent with that of climate factors. These results show that the variation of rainfall erosivity on the Loess Plateau from 1901 to 2016 is not significant, the change of rainfall erosivity is periodic and its spatial distribution is obviously different.

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Last Update: 2022-06-20