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[1]CAO Yu,GAO Chao,ZHANG Xiaoming,et al.Temporal and Spatial Distribution Characteristics of Erosive Rainfall in Hubei Province[J].Research of Soil and Water Conservation,2023,30(01):41-46,53.[doi:10.13869/j.cnki.rswc.2023.01.037]

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Temporal and Spatial Distribution Characteristics of Erosive Rainfall in Hubei Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 01 Page number: 41-46,53 Column: Public date: 2023-01-10

Title:: Temporal and Spatial Distribution Characteristics of Erosive Rainfall in Hubei Province

Author(s):: CAO Yu¹, GAO Chao², ZHANG Xiaoming¹, WANG Shunjie¹, YANG Qingjie¹; (1.College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; 2.Hubei Soil and Water Conservation Monitoring Center, Wuhan, China)

Keywords:: soil and water conservation; rainfall erosivity; spatial interpolation; spatiotemporal distribution; erosive rainfall

CLC:: S157.1

DOI:: 10.13869/j.cnki.rswc.2023.01.037

Abstract:: Erosive rainfall is the driving force of severe water erosion in the red soil region of south China. Therefore, it is of great significance to analyze its spatial and temporal distribution characteristics for the study of regional soil and water conservation. In this paper, the erosive rainfall standard and rainfall erosivity of 24 monitoring stations in four soil and water conservation regions of Hubei Province were analyzed and calculated based on the national meteorological data website data and the artificial observation data of soil and water conservation monitoring stations, and the Kriging model was used for spatiotemporal interpolation. The results show that the rainfall erosivity of Hubei Province increased gradually from northwest to southeast, which showed the same characteristics as the spatial distribution of rainfall; annual average rainfall of the whole province ranged from 813.88 mm to 1 590.15 mm, the average annual rainfall was 1 201.98 mm, the annual average erosive rainfall was 603.53 mm; The annual average erosive rainfall accounted for 50.21% of the annual average rainfall, the annual average frequency of erosive rainfall was 14; the average single erosive rainfall was 46.88 mm; according to the calculation results of annual average half month erosivity, the average annual rainfall erosivity of Hubei Province was 6 650.10 MJ·mm/(hm²·h·a); The temporal distribution of annual rainfall erosivity in Hubei Province basically conformed to normal distribution; the total rainfall erosivity from April to October was 6 202.10 MJ·mm/(hm²·h·a), accounting for 93.26% of the annual rainfall erosivity. These results are helpful to the planning of soil and water conservation in the province, and it has a certain guiding significance for the prevention and control of soil erosion in different periods.

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Last Update: 2023-01-10