太湖流域1991年特大洪涝成因与对策探讨

CAUSE OF DEVASTATING FLOOD IN TAIHU LAKE CATCHMENT IN 1991 AND ITS COUNTERMEASURE

受天地生相互作用影响,1991年大气环流异常,太湖流域出现了两度梅雨,雨期长、降水强度大。由于近数十年来,水域环境发生了变化,洪水出路不畅,6—7月间发生了特大洪涝,其特征是:降水逊于历史,水位超历史;成灾面积不及历史,经济损失远超历史。协调人地关系不善,加剧了这次洪涝灾害。因而,在统一规划下,协调好人地关系,是重要的减灾对策。

Affected by interaction of cosmos-earth-life, the atmnspheric circulation has been abnomal this year. Meiyu happened twice in Taihu area with intensive rainfall. In recent decades,due to the change in water environmental system, the reduction of flood-drainage capacity resulted in the devastating flood from June to July in that area,which were characterized by the follows: 1) less rainfall ,higher water level; 2) less flood-stricken area,greater economic losses. As compared with the historical desasters in this area,the unharmonic man-land relationship accounts for the area to be hit by devastating floods. Therefore,how to harmonize the interrelation between man and land under a unified planning is of the utmost impartance for disaster prevention.