水土保持研究2013，Vol.20Issue(2)：33-37,5.
闽西典型红壤区降雨侵蚀力变化特征研究
Study on the Characteristics Rainfall Erosivity Changes of the Typical Red Soil Region in Western Fujian
摘要
Abstract
The soil erosion in typical red soil region of western Fujian is serious, especially in Changting, Nin-ghua county, etc. This area belongs to national key soil and water loss control region. The data from 10 sites of rainfall from 1980 to 2009 in Western Fujian was used to calculate the rainfall erosivity R and the temporal and spatial distribution characteristics of the regional rainfall erosivity was studied. It turned out that rainfall erosivity distribution in 10 stations in typical red soil region of western Fujian mainly concentrated from March to August. It s a weak bimodal type distribution. The interannual change of R was large. The largest R was 525. 31 (MJ·mm)/(hm2·h) in 1983, the smallest R was 155. 63 (MJ·mm)/(hm2·h) in 1991. The largest was 3. 38 times of the smallest. Annual rainfall erosivity in 30 years did not appear obvious abrupt change. The spatial distribution of rainfall erosivity was uneven. The overall trend was the increase from the east to the west in the west part, and the decrease from the southeast and southwest to the intermediate in the south part.关键词
闽西地区/降雨侵蚀力/变异系数Key words
western Fujian/ rainfall erosivity/ variable coefficient分类
农业科技引用本文复制引用
高翠,查轩,黄少燕..闽西典型红壤区降雨侵蚀力变化特征研究[J].水土保持研究,2013,20(2):33-37,5.基金项目
国家重点基础研究发展计划973项目(2007CB407207) （2007CB407207）
福建省公益类科研院所基本科研专项项目(2010R1037-1) （2010R1037-1）
