英波冲水库位于湖南省长沙县,由于该地区属花岗岩地层,筑坝土料大多采用渗透系数较大的强风化花岗岩砂砾土。1982年汛期,主副坝一、二级外坡大面积渗水,出现管涌和流土,坝顶沿内侧产生一条宽8～12cm、长91m、深4 m多的大裂缝。经抢险虽保住了大坝,但渗流仍严重。 Yingbo Chong Reservoir is located in Changsha County, Hunan Province. Due to the granite formation in the area, most of the dam materials used are strong weathered granite gravel with large permeability coefficient. In the flood season of 1982, a large area of ​​primary and secondary outer water seepage occurred, piping and earth flow occurred, the crest along the inside to produce a wide crack of 8 ~ 12cm, length 91m, depth 4m more. Although the rescue of the dam has been saved, but seepage is still serious.