摘要
本文在前人研究的基础上，通过对水土流失现象，水土保持林以及森林覆盖率与土壤流失量（或侵蚀模数）的综合分析，首次定义水土保持林有效覆盖率（ＥＣＲ）为在水土保持林防护范围内土壤流失量等于或小于允许流失量时的森林覆盖率。并提出了确定方法，还以黄土高原水土流失区为例，初步确定了该区的水土保持林的ＥＣＲ约为４３％。
Through comprehensive analysis on the phenomenon of soil and water loss,system of soil and water conservation forest,relationship between forestry cover rate and amount of soil loss, a conception of ECR (effective cover rate) for soil and water conservation is advanced as the cover rate when the amount of soil loss is equal to the permissible amount of soil loss in protective region of soil and water conservation forest.The soil and water loss region in the loess plateau is given as an example,the ECR is 43%,The verifiction also was made in this paper.
出处
《西北林学院学报》
CSCD
北大核心
1997年第1期97-100,共4页
Journal of Northwest Forestry University
基金
国家"八五"科技攻关项目
关键词
水土保持林
有效覆盖率
soil and water conservation forest,ECR
the determining method
