摘要
利用江苏省52个气象站1961~2012年日降水数据,构建了逐月降雨侵蚀力序列,探讨了研究区降雨侵蚀力的时空变化格局。结果表明:(1)江苏省降雨侵蚀力的年内分配呈现出较强的不均匀性,侵蚀力主要集中于夏季的7月份,其中苏北地区7月降雨侵蚀力明显高于苏南地区;(2)基于K-means聚类分析,研究区可以划分为苏北、苏中、苏南这3个具有不同年降雨侵蚀力演化特征的子区域,其中苏南地区年降雨侵蚀力的增加趋势较为显著,且这3个子区域降雨侵蚀力的年际变化均呈现出2~4年的周期性振荡;(3)基于Mann-Kendall检验,研究区不同月份降雨侵蚀力的变化趋势呈现出明显的季节性差异,突出体现在冬季降雨侵蚀力的显著增加和夏季降雨侵蚀力的有所增强。
According to the daily rainfall data provided by 52 meteorological stations in Jiangsu province during 1961 ～ 2012,this article constructed the monthly rainfall erosivity series, and explored the spatio-temporal variation pattern of rainfall erosivityin this province. The results indicated that： （ 1） The distribution of rainfall erosivity within a year in Jiangsu province was verynon-uniform, the rainfall erosivity was mainly concentrated in July, and the rainfall erosivity of July in the northern region of Jiangsu province was obviously higher than that in the southern region of this province; （ 2） Through K-means clustering analysis,Jiangsu province could be divided into three sub-regions with different evolution characteristics of annual rainfall erosivity, including the northern region, central region and southern region of this province. The increasing trend of annual rainfall erosivity in thesouthern region of Jiangsu province was more significant. The 2 ～ 4-year periodic oscillation in annual rainfall erosivity was foundin these three sub-regions; （3） Based on Mann-Kendall test, the changing trend of rainfall erosivity in different months showedobvious seasonal differences in the studied area, especially the winter rainfall erosivity increased significantly, and the summerrainfall erosivity strengthened somewhat.
作者
余寒
杨凯
闵俊杰
黄进
YU Han;YANG Kai;MIN Jun-jie;HUANG Jin(Limited Company of State Power Environmental Protection Research Institute,Nanjing 210031,China;School of Applied Meteorology,Nanjing University of Information Science and Technology,Nanjing 210044,China)
出处
《江西农业学报》
CAS
2018年第10期106-111,共6页
Acta Agriculturae Jiangxi
基金
江苏省高校自然科学研究面上项目(16KJB170008)
