In Tsengwen Dam Raise Reservoir Water Level Project at Taiwan, the greatest construction risk is the overtopping of the dam by flood when the crest is lowered by excavations. 但在取得成绩的同时，也陆续出现了若干座水库在除险加固完成后或加固过程中发生溃坝的不正常现象，反映病险水库除险加固工作还存在不可忽视的缺陷。
We will pool resources to basically complete, within two or three years, the upgrading of all largemedium-sizedkey dilapidated small reservoirs in China. 集中力量用两到三年时间基本完成全国大中型和重点小型病险水库改造。
