四湖地区湖泊水域萎缩及其洪涝灾害研究

采用遥感方法分析了四湖地区的湖泊水域的动态变化，分析结果表明：该地区５０年代至８０年代初由于大规模围湖造田，致使湖泊水域萎缩相当严重。８０年代以后，湖泊水面急剧减少的趋势得到遏制，而９０年代以后，湖泊水面基本处于无显著变化状态。由于四湖地区湖泊萎缩，湖泊的调蓄功能受到严重破坏，致使洪涝灾害频繁发生。恶化了生态环境。因此我们应该全面规划，综合利用湖泊资源，坚决禁止围湖造田，有些地区还应退田还湖。加强

ON THE REDUCTION OF LACUSTRINE WATER AND THE FLOOD DISASTERS IN THE SIHU AREA

In this paper,dynamic changes of lacustrine water in the Sihu area were analyzed by using remote sensing.It shows that due to large scale land reclamation from lakes,the reduction in water capacity was very serious from the 1950s to 1980s.After the 1980s,the trend of sharp decrease of water area was held back.Little changes occurred since the 1990s.As the result of lakes' reduction in the Sihu area,adjustment storage function of lakes was diminished gravely,which leads to frequent occurrence of flood disasters and deterioration of ecological enviroment in this area.Thereby we should make overall planning and utilize the lake resource comprehensively.The land reclamation from lakes must be forbidden,and return the reclaimed farmland to lakes in some area.We should also strengthen the protection of lake resource and prompt balanced development of ecological environment and exploitation of resources in the lake area.