[1]XU Jing,SHI Yanfeng,XU Zhenghe,et al.Spatiotemporal Variation Characteristics of Rainfall Erosivity in Yimeng Mountain Area from 1961 to 2020[J].Research of Soil and Water Conservation,2022,29(06):36-44.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 06
Page number:
36-44
Column:
Public date:
2022-10-20
- Title:
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Spatiotemporal Variation Characteristics of Rainfall Erosivity in Yimeng Mountain Area from 1961 to 2020
- Author(s):
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XU Jing1, SHI Yanfeng2, XU Zhenghe1, XU Lirong1
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(1.School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China; 2.School of Municipal & Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China)
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- Keywords:
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rainfall erosivity; soil erosion; spatiotemporal variation characteristics; daily rainfall erosivity model; Yimeng Mountain Area
- CLC:
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S157.1
- DOI:
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- Abstract:
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In order to analyze the spatiotemporal variation characteristics of rainfall erosivity in Yimeng Mountain Area, a systematic research was carried out based on the daily rainfall data from 1961 to 2020 of 20 national meteorological stations. The study methods include the daily rainfall erosivity model, Mann-Kendall test, cumulative anomaly method, wavelet analysis and inverse distance weighted interpolation(IDW). The results are as follows. The average annual rainfall erosivity was 5 081.59(MJ·mm)/(hm2·h·a)in Yimeng Mountain Area, and the interannual variation showed a fluctuating upward trend. Annual rainfall erosivity had a main cycle of 28-year and a subcycle of 13-year. Rainfall erosivity mostly concentrated in the flood season from June to September, accounting for 84.15% of the whole year. And except autumn, rainfall erosivity in spring, summer and winter showed an upward trend. The annual rainfall erosivity decreased gradually from southeast to northwest. The variation coefficients of the rainfall stations had obvious regional differences, ranging from 0.32 to 0.53, which was relatively great in the western region and relatively small in the southern region. The spatiotemporal distribution characteristics of rainfall erosivity in Yimeng Mountain Area were basically consistent with the distribution of erosive rainfall. And the rainfall erosivity mainly concentrated in the flood season. So, the soil erosion control in the flood season, especially in July and August, should be strengthened. These results can provide important reference for the monitoring, prediction and treatment of soil and water losses in the study area.