0　前　　言湖南省洞庭湖区堤垸 2 2 6个 ,垸内有耕地 1 0 0 0万亩 ,垸民 1 0 0 0万人。大堤长580 0 km,堤身高度 8m～ 1 0 m,挡水高度一般为 7m～ 8m,其中渗漏堤长 1 70 0 km。1 983年汛期高水位下出现渗漏和翻沙鼓水险情2 1 0 0 0处 ,渗漏成了防汛的主要险患 ,渗漏发展形成的 0 Introduction There are 226 embankments in the Dongting Lake area of ​​Hunan Province, 10 million mu of cultivated land and 10 million embankments. The length of the embankment is 580 0 km and the height of the embankment is 8m ~ 10m. The water retaining height is generally 7m ~ 8m, of which the seepage embankment length is 1 70 0 km. In the flood season of 1983, there was a danger of seepage and overheating of water at a high water level of 210,000. Leakage has become the major hazard for flood control and the formation of leakage