An Analysis of Rainfall Erosivity Change in Zhejiang Province

SHEN Zhao-wei; TIAN Gang; LI Gang; LU Fang-chun

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An Analysis of Rainfall Erosivity Change in Zhejiang Province

- An Analysis of Rainfall Erosivity Change in Zhejiang Province
- Bulletin of Soiland Water Conservation Vol. 32, Issue 4, Pages: 119-124(2013)
- 作者机构：
  
  浙江省水利河口研究院浙江广川工程咨询有限公司,浙江,杭州,310020
- 作者简介：
- 基金信息：
- DOI：
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- Published：2013
- 稿件说明：
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SHEN Zhao-wei, TIAN Gang, LI Gang, et al. An Analysis of Rainfall Erosivity Change in Zhejiang Province[J]. Bulletin of Soiland Water Conservation, 2013, 32(4): 119-124.
DOI：

SHEN Zhao-wei, TIAN Gang, LI Gang, et al. An Analysis of Rainfall Erosivity Change in Zhejiang Province[J]. Bulletin of Soiland Water Conservation, 2013, 32(4): 119-124. DOI：

摘要

根据浙江省83个气象站1980-2009年逐日雨量资料

采用日降雨侵蚀力模型

运用Mann-Kendall非参数检验和径向基函数插值等方法

研究了该省降雨侵蚀力变化的时空分布特征。结果表明

近30a来浙江省多年降雨侵蚀力长期变化趋势不显著

但冬季呈显著上升趋势

1和12月为上升趋势的主要贡献月份;浙江省多年平均降雨侵蚀力由西北向东南递增

月、季降雨侵蚀力变化趋势显著的集中区主要位于浙中浙北地区

但夏季降雨侵蚀力较大

上升趋势显著的集中区位于该省东南部

该地区降雨潜在侵蚀动能较大

是水土保持的重点区域。

Abstract

Based on a long time series(1980-2009)daily rainfall data collected by 83meteorological stations

the rainfall erosivity in Zhejiang Province was calculated by using daily rainfall erosivity model.The temporal changes and its spatial distribution characteristics of rainfall erosivity were analyzed by using the non-parametric Mann-Kendall test and radial basis function interpolation.The results indicated that there are no significant changes in the long-term mean annual rainfall erosivity

significant increases of rainfall erosivity occurred in winter

especially in January and December.An increasing trend in mean annual rainfall erosivity was showed from the northwest to the southeast of Zhejiang Province.While the most monthly and seasonally rainfall erosivity changes mainly occurred in the northern and the central part of Zhejiang Province with the rainfall erosivity was obviously higher in summer than that in other three seasons.As the main region where the most significant rainfall erosivity changes occurs

and the region with relative high rainfall kinetic energy

southeast part of Zhejiang Province was regarded as the key area for soil and water conservation.

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