Variation of Rainfall Erosivity and Its Influencing Factors in Jiuqushui Watershed, Southern Jiangxi Province

LI Jun; SHENG Fei; LIU Shiyu; ZHANG Ting; YU Minqi

doi:10.13870/j.cnki.stbcxb.2022.04.009

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Variation of Rainfall Erosivity and Its Influencing Factors in Jiuqushui Watershed, Southern Jiangxi Province

更新时间：2025-03-12

- Variation of Rainfall Erosivity and Its Influencing Factors in Jiuqushui Watershed, Southern Jiangxi Province
- Vol. 36, Issue 4, Pages: 63-73(2022)
- 作者机构：
  
  1. 江西农业大学国土资源与环境学院,南昌,330045
  2. 江西省鄱阳湖流域农业资源与生态重点实验室,南昌,330045
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2022.04.009
  CLC： S157.1
- Published：2022
- 稿件说明：
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LI Jun, SHENG Fei, LIU Shiyu, et al. Variation of Rainfall Erosivity and Its Influencing Factors in Jiuqushui Watershed, Southern Jiangxi Province[J]. 2022, 36(4): 63-73.
DOI：

LI Jun, SHENG Fei, LIU Shiyu, et al. Variation of Rainfall Erosivity and Its Influencing Factors in Jiuqushui Watershed, Southern Jiangxi Province[J]. 2022, 36(4): 63-73. DOI： 10.13870/j.cnki.stbcxb.2022.04.009.

摘要

为有效防治流域土壤侵蚀、维护生态安全，基于九曲水流域1982—2019年逐日降雨数据，运用小波分析、交叉小波变换等方法分析了中雨、大雨、暴雨及年降雨侵蚀力的年际变化规律，并探讨了太阳黑子、厄尔尼诺—南方涛动（ENSO）、北极涛动（AO）及太平洋年代际涛动（PDO）对它们的影响。结果表明：（1）中雨、大雨、暴雨及年降雨侵蚀力的年际变化趋势均不显著（p>0.05），其变异系数（CV）分别为0.24，0.31，0.64，0.26，均属于中等变异。（2）不同量级降雨侵蚀力的周期变化差异明显，年降雨侵蚀力与暴雨侵蚀力均存在15~23年周期变化和19年主周期，二者联系更紧密。（3）年降雨侵蚀力和暴雨侵蚀力与太阳黑子、ENSO、AO、PDO均分别存在9~11，10~11，10~11，9~10年的显著共振周期，暴雨侵蚀力受太阳黑子、ENSO、PDO的影响大于中雨、大雨侵蚀力，大雨侵蚀力受AO的影响大于中雨、暴雨侵蚀力。研究成果可为赣南乃至我国土壤侵蚀预测预报与防治提供科学依据。

Abstract

In order to effectively prevent soil erosion in the watershed and maintain ecological security

based on the daily precipitation data from 1982 to 2019 in Jiuqushui watershed

the inter-annual variation rules of erosivity of moderate rain

heavy rain

rainstorm and annual rainfall were analyzed by using wavelet analysis and cross wavelet transform

the influences of Sunspots

El Niño-Southern Oscillation (ENSO)

Arctic Oscillation (AO) and Pacific Decadal Oscillation (PDO) on them were discussed. The results indicated that:(1) The inter-annual variation trend of moderate rain erosivity

heavy rain erosivity

rainstorm erosivity and annual rainfall erosivity was not significant (p>0.05)

and the coefficient of variation (CV) was 0.24

0.31

0.64 and 0.26

respectively

which were all moderate variations. (2) The periodic variation of rainfall erosivity in different magnitudes was obviously different

the annual rainfall erosivity and rainstorm erosivity had a 15 to 23 years cycle and a 19-year main cycle

which were more closely related. (3) The annual rainfall erosivity and rainstorm erosivity had significant resonance periods of 9 to 11

10 to 11

10 to 11 and 9 to 10 years with Sunspot

ENSO

AO and PDO

respectively. The impact of Sunspot

ENSO and PDO on rainstorm erosivity was greater than that of moderate rain erosivity and heavy rain erosivity. And the impact of AO on heavy rain erosivity was greater than that of moderate rain erosivity and rainstorm erosivity. The research results could provide scientific basis for soil erosion prediction and prevention in southern Jiangxi and even China.

关键词

Keywords

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