1980-2009年闽东南地区降雨侵蚀力的时空分布特征  

Temporal and Spatial Characteristics of Rainfall Erosivity in Southeast Fujian Province During 1980-2009

作　　者：崔晓燕[1] 查轩[1] 黄少燕[1] 

机构地区：[1]福建省亚热带资源与环境重点实验室、福建师范大学地理科学研究所,福建福州350007

出　　处：《水土保持通报》2015年第1期1-4,24,共5页Bulletin of Soil and Water Conservation

基　　金：国家科技支撑计划项目“强度侵蚀区退化生态系统修复关键技术的研究与集成”(2014BAD15B02);国家重点基础研究发展计划项目“南方红壤区水土流失综合治理范式及调控机理研究”(2007CB407207)

摘　　要：[目的]揭示闽东南地区降雨侵蚀力的时空变异特征,为区域水土流失防治及水土保持规划提供依据。[方法]基于闽东南地区1980—2009年26个雨量站的逐日降雨数据,运用福建省降雨侵蚀力简易算法。[结果]闽东南地区降雨侵蚀力年内分布集中于5—8月,呈现双峰式分布;降雨侵蚀力年际间变化幅度较大。1982年年降雨侵蚀力(R值)低至253.82(MJ·mm)/(hm2·h),2006年R值高达725.39(MJ·mm)/(hm2·h),极值比为2.86;30a内的闽东南地区的降雨侵蚀力并未出现明显的突变现象。[结论]研究区内降雨侵蚀力R值空间分布不均匀,总体上呈现沿海向内陆增加,西南高东北低的趋势。[Objective] Studying the distribution pattern of rainfall erosivity in the southeastern area of Fujian Province to privide basis for soil erosion control and soil and water conservation plan. [Methods] Based on the data from 26 rainfall station in the Southeastern Fujian Province during 1980--2009, simple algorithm for rainfall erosivity was used. [Results] Rainfall erosivity in Southeastern Fujian Province showed a bimodal dis- tribution as it occoured mainly from May to August. Rainfall erosivity varied greatly over years. The highest value was 725.39 （MJ · mm） / （hm2 · h） occurred in 2006, while the lowest value was 253.82 （MJ · mm） / （hm2· h） occurred in 1982, with the extreme ratio of 2.86. Rainfall erosivity in Southeast Fujian Province during the past 30 years did not showed abrupt changes. [Conclusion] Rainfall erosivity showed an uneven distribution pattern with increasing trend from coast to inland, and the value was comparatively higher in southwest than that in northeast.

关 键 词：闽东南地区 降雨侵蚀力 Mann—Kendall突变检验 变异系数 

分 类 号：S157.1[农业科学—土壤学]