Spatio-temporal Variations Characteristics of Rainfall Erosivity During 1961-2010 in Yihe Basin

LI Zijun; LIN Jinkuo; JIANG Aixia; ZHANG Chen

doi:10.13961/j.cnki.stbctb.2017.03.015

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Spatio-temporal Variations Characteristics of Rainfall Erosivity During 1961-2010 in Yihe Basin

- Spatio-temporal Variations Characteristics of Rainfall Erosivity During 1961-2010 in Yihe Basin
- Bulletin of Soiland Water Conservation Vol. 37, Issue 3, Pages: 86-92(2017)
- 作者机构：
  
  山东师范大学地理与环境学院,山东,济南,250014
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.03.015
  CLC：
- Published：2017
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LI Zijun, LIN Jinkuo, JIANG Aixia, et al. Spatio-temporal Variations Characteristics of Rainfall Erosivity During 1961-2010 in Yihe Basin[J]. Bulletin of Soiland Water Conservation, 2017, 37(3): 86-92.
DOI：

LI Zijun, LIN Jinkuo, JIANG Aixia, et al. Spatio-temporal Variations Characteristics of Rainfall Erosivity During 1961-2010 in Yihe Basin[J]. Bulletin of Soiland Water Conservation, 2017, 37(3): 86-92. DOI： 10.13961/j.cnki.stbctb.2017.03.015.

摘要

[目的

]

分析沂河流域近50 a的降雨量和降雨侵蚀力的时空变化特征，为流域水土流失防治及土地利用合理规划等工作提供参考。[方法

]

利用沂河流域及周边12个气象站1961-2010年的日降雨数据，基于日降雨信息的月降雨侵蚀力模型计算流域多年平均降雨侵蚀力，采用Mann-Kendall非参数检验法及析取Kriging内插法分析流域降雨量和降雨侵蚀力的时空变化特征。[结果

]

沂河流域降雨量和降雨侵蚀力空间分布上呈现出由西南向北逐级递减的变化趋势。多年平均降雨量为789.41 mm，多年平均降雨侵蚀力为2626.09（MJ·mm）/（hm

·h·a），两者都在1965年产生突变；降雨量和降雨侵蚀力年内分布主要集中在夏季（6-8月），分别占全年比例的63.02%和71.22%，二者最大值都出现在7月，且秋季对流域多年降雨量的减少趋势贡献最多，夏季的降雨侵蚀力上升幅度最大。[结论

]

沂河流域的降雨量和降雨侵蚀力空间分布趋势相似，不同月份的降雨量与降雨侵蚀力差异不同。

Abstract

[Objective] Analyzing the spatio-temporal variations of rainfall and rainfall erosivity of the Yihe Basin

to provide some references for soil and water loss control and land use planning.[Methods] A monthly rainfall erosivity model was adopted to calculate the rainfall erosivity by using daily precipitation data that were collected from 12 weather stations of Yihe Basin and its surrounding regions during 1961-2010. The spatio-temporal variations of rainfall and rainfall erosivity were analyzed by Mann-Kendall nonparametric tests and disjunctive Kriging space interpolation method.[Results] The spatial distributions of rainfall and rainfall erosivity in Yihe Basin showed a decreasing trends from the southwest part to the north part. The yearly averaged rainfall and rainfall erosivity were 789.41 mm and 2 626.09(MJ·mm)/(hm2·h·a). Both of them were observed changed abruptly in 1965. The monthly rainfall and rainfall erosivity in Yihe Basin were mainly distributed in summer(June to August)

accounting for 63.02% and 71.22% of the corresponding annual values respectively

and their maximum value were all found in July. The decrease proportion of rainfall in Autumn contributed mostly to the yearly decreasing trend of rainfall. The rainfall erosivity in summer had the greatest contribution.[Conclusion] The spatial distribution of rainfall and rainfall erosivity was similar in Yihe Basin. The monthly rainfall was different from the monthly rainfall erosivity.

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