长江中上游水土保持建设在防洪中的作用

１９９８年长江发生了继１９５４的以来又一次流域性大洪水，其水位之高，持续时间之长，洪峰次数之多，抗洪抢险投入之大，都是历史上罕见的，分析了此次洪灾，除气候异常、降雨集中外、长江中上游严重的水土流失和脆弱的生态环境也在很大程度上直接或间接加重了洪水造成的险情和灾情。以长江上游水土保持重点防治工程１０年成效论述了水土保持在长江防洪中的作用。

The Role of Soil Loss Control in the Upper and Middle Yangtze Reaches and Flood Control

In 1998, a valley-wide flood happened ever since 1954. As to the high floods level, long durability, more flood peaks, and large anti-flood investment, it is regarded as an exceptionally serious flood in history. It is put forward that heavy soil loss and vulnerable eco-environment in the upper and middle reaches aggravated the disaster directly and indirectly to a large degree, except for other causes such as climate variation and concentrated rainfall. It also illustrated the role of water conservation in flood control in view of the achievements by the soil loss control project in the middle and upper Yangtze reaches in the past decade.