【摘要】 降雨侵蚀力时空变化趋势的研究对于揭示土壤水蚀的形成机制与演替过程具有重要意义。该文利用1957-2008年江西省16个气象站的降雨资料,综合运用Mann-Kendall非参数检验和径向基函数插值等方法,分析了该省降雨侵蚀力变化的时空特征。结果表明:52年来江西全省侵蚀力总体上呈现增长趋势,夏季及7、8月份是增加的主要贡献季度和月份。全省降雨侵蚀力升降的区域差异性明显,分别存在赣西北、樟树和赣西南3个上升中心和赣东、赣西和赣东南3个下降中心,其中赣西北、赣西南等地区的降雨侵蚀力持续上升,应作为该省水土流失的重点研究和防治区域。更多还原

【Abstract】 The study of spatial and temporal distribution characteristics of rainfall erosivity changes is of great significance to discover the formation mechanism and evolution process of soil water erosion.On the basis of precipitation database from 1957 to 2008 collected by 16 meteorological stations in Jiangxi province,the temporal changes of long time series and its spatial distribution characteristics of rainfall erosivity were analyzed,which could be the foundation in the study of the consequences of climatic change on soil erosion.Methods of Mann-Kendall test and interpolation of radial basis functions were employed.The results showed that mean annual rainfall erosivity was in an increasing trend and the growth was mainly put in position in relation to other things occurred in summer,especially July and August.Local spatial variation of erosivity was very distinct in Jiangxi province.There were three distinct erosivity-increasing centers(northwest,Zhangshu city and southwest of Jiangxi province)and three distinct decreasing centers (East,West and southeast of Jiangxi province).These regions such as northwest,southwest of Jiangxi province where the rainfall erosivity increased consistently in the past 52 years,should be the priority areas to control soil and water erosion especially.更多还原