'98长江特大洪灾的历史成因与对策

在收集大量数据资料的基础上，对１９９８年长江洪灾灾情、不同历史时期长江流域洪灾的次数与频率、森林资源、水土流失状况等进行了比较分析。认为长江流域洪灾发生的频率越来越高、危害的程度越来越大的根本原因在于森林植被的破坏，使森林覆盖率、森林质量下降，降低了调蓄洪水的能力；水土流失加剧，湖泊泥沙淤积，使蓄洪和行洪能力下降。并就如何恢复和发展森林植被，提出了一些对策。

Historical Causes and Strategies on the Catastrophic Floods of Changjiang River in 1998

Based on collected data, this paper deals with a preliminary analysis about information of the situations, time and frequency of the floods in different history times, forest resources and soil erosion. At present, the more frequently the flood occur red, the more dangerous disasters happened. The main causes were the decrease of forest coverage rate and degradation of forest quality, leading to the decline of water retaining and mitigating ability of forest. In the mean time, the lake functions on water retain and runoff mitigation declined due to severe water and soil loss and accumulated sediment. Some strategics are proposed in the paper to restore and develop forest vegetation in this area.