摘要
研究了长江三峡花岗岩出露区林地土壤流失特性，结果表明由鳞片状面蚀导致的土壤流失量分布与月降雨量的分布趋势基本一致，二者呈现出较为明显的线性相关关系，植被盖度≥0．70的林地土壤流失多集中发生在6～9月份，土壤流失量在500t／（km2·a）以下，盖度＜0.7的林地土壤流失年内分布时间多在3～10月份，土壤流失量为500～6000t／（km2·a）．
The property of soil loss on forest land and the time distribution in granite region ofthe Three-gorge of the Yangtze River were studied. The result shows that the general trend ofmonthly distribution of soil loss caused by the sheet erosion is in keeping with the monthlyrainfall,and both of them appear obviously relationship of liner. The amount of soil loss on for-est land with above 0. 70 of plant coverage is less than 500 t/(km2. a),which mainly occursfrom June to September. The amount of soil loss on the forest land with less that 0. 70 of plantcoverage is 500~ 6 000 t/(km2. a),which mainly occurs from March to October.
出处
《水土保持研究》
CSCD
1998年第2期99-103,158,共6页
Research of Soil and Water Conservation
关键词
长江三峡
林地
土壤流失
保持作用
the three-gorge of the Yangtze River forest land soil loss
