Spatiotemporal Variation Trend Analysis of Rainfall Erosivity in Yimeng Mountain Region Based on M-K Test and Geostatistical Analysis

Qi Fei; Zhang Chunqiang; Liu Xia; Yu Haipeng; Zhao Chuanpu; Wu Ao; Jia Min

doi:10.13961/j.cnki.stbctb.2021.05.020

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Spatiotemporal Variation Trend Analysis of Rainfall Erosivity in Yimeng Mountain Region Based on M-K Test and Geostatistical Analysis

- Spatiotemporal Variation Trend Analysis of Rainfall Erosivity in Yimeng Mountain Region Based on M-K Test and Geostatistical Analysis
- Bulletin of Soiland Water Conservation Vol. 41, Issue 5, Pages: 146-153(2021)
- 作者机构：
  
  1. 南京林业大学南方现代林业协同创新中心, 江苏省水土保持与生态修复重点实验室,江苏,南京,210037
  2. 淮河水利委员会淮河流域水土保持监测中心站,安徽,蚌埠,233001
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2021.05.020
  CLC： S157
- Published：2021
- 稿件说明：
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Qi Fei, Zhang Chunqiang, Liu Xia, et al. Spatiotemporal Variation Trend Analysis of Rainfall Erosivity in Yimeng Mountain Region Based on M-K Test and Geostatistical Analysis[J]. Bulletin of Soiland Water Conservation, 2021, 41(5): 146-153.
DOI：

Qi Fei, Zhang Chunqiang, Liu Xia, et al. Spatiotemporal Variation Trend Analysis of Rainfall Erosivity in Yimeng Mountain Region Based on M-K Test and Geostatistical Analysis[J]. Bulletin of Soiland Water Conservation, 2021, 41(5): 146-153. DOI： 10.13961/j.cnki.stbctb.2021.05.020.

摘要

[目的

]

分析降雨侵蚀力的时空变化特征，为区域土壤流失监测和水土保持工作提供数据支撑。[方法

]

利用沂蒙山国家级水土流失重点治理区及其周边71个雨量站1980—2018年逐日雨量资料，综合运用冷暖季日雨量公式、M-K检验、地统计插值等方法，对降雨侵蚀力的时空变化趋势进行分析。[结果

]

①降雨量和侵蚀性降雨量成中度月集中性（FI>53，CI>0.17），降雨侵蚀力具有高度月度集中性（FI=399.88，CI=0.24），年内变化曲线呈单峰形，峰顶位于7—8月； ②研究区多年平均降雨量743.52 mm，多年平均降雨侵蚀力3 656.87 MJ·mm/（hm

·h·a），空间上呈现北低南高，西低东高的分布趋势； ③降雨侵蚀力年际波动属中等变异，总体呈不显著增长趋势。空间上在西北部上升趋势显著（z>1.96），在南部少量区域呈不显著的下降趋势（z

0）。[结论

]

降雨侵蚀力增加会导致区域水土流失风险提升，因此，应针对区域降雨侵蚀力增加区域，加强水土流失综合防治工作，实现生态环境与经济社会的可持续发展。

Abstract

[Objective] The spatial and temporal variation characteristics of rainfall erosivity were analyzed in order to provide data support for regional soil loss monitoring and soil and water conservation.[Methods] Based on daily rainfall data from 71 rainfall stations in Yimeng Mountain region and its surrounding areas from 1980 to 2018

the temporal and spatial variation trend of rainfall erosivity was analyzed using the daily rainfall formula

M-K test

geostatistical analysis

and so on.[Results] ① Rainfall and erosive rainfall had a moderate monthly concentration (FI>53

CI>0.17)

rainfall erosivity had a high monthly concentration (FI=399.88

CI=0.24)

and the annual variation curve was unimodal

with the peak occurring from July to August. ② The annual average rainfall in the study area was 744 mm

and the annual average rainfall erosivity was 3 657 MJ·mm/(hm2·h·a)

showing a spatial distribution trend of low in the north and high in the south

low in the west and high in the east. ③ The interannual variation of rainfall erosivity was moderate

and the overall trend was not significant. Spatially

there was a significant upward trend in the northwest (z>1.96) and an insignificant downward trend in the south (z<0.05).[Conclusion] The increase in rainfall erosivity will increase the risk of regional soil and water loss. Therefore

comprehensive prevention and control of soil and water loss should be strengthened so as to realize the sustainable development of the ecological environment and economic society.

关键词

Keywords

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