摘要
Based on the analysis of forest inner mechanism, forest benefit in re ducing flood disaster is defined. Through the characteristic analysis of forest benefit in reducing flood disaster, it is suggested that it is impossible to ado pt the microanalysis method for studying the forest benefit in reducing flood, t he macro analysis is the only method to be adopted. With the special case of dis aster flooding of Changjiang River happened in 1998, the forest benefit in reduc ing flood disaster was scientifically assessed. The estimated results of forest benefit in reducing flood shows that forest vegetation establishment is the radi cal way to control flood, but it only equals to 5 percent of the total benefits of water conservancy facilities.
本文以森林内涵机理分析为基础，定义了森林减轻水灾的效益。通过对森林减轻水灾效益的 性质分析，指出对该效益的研究不能采用微观分析法，只能采用宏观分析法。利用1998年长 江发生特大洪水的案例，首次在较大的范围内，对森林减轻水灾的效益作出了科学地评价。 尽管恢复森林植被是控制洪水的基本途径，但森林减轻水灾的效益只相当于所有水利部门应 当承担总效益的5%。
基金
National Foundation of Ninth Five-Yea r Plan (No. 96-007-04-06-03).
