2008年5月12日，汶川特大地震在灾区诱发了34处规模较大的堰塞湖，影响巨大，特别是唐家山堰塞湖，引起了全国广泛关注和重视。堰塞湖往往会带来严重的灾害，不仅在形成过程中可能造成生命财产的直接损失及上游的淹没损失，而且在形成后还会对下游带来淹没或溃坝洪水等次生灾害。考虑堰塞坝应急处置的特点，评价了堰塞坝的渗透稳定性，确定了渗透破坏的形式和程度，并以唐家山堰塞坝为例进行了渗流计算分析，以期对堰塞坝安全性状评估的进一步研究提供参考。

Thirty-four large-scale barrier lakes induced by the Wenchuan earthquake on May 12 occurred， in the meanwhile enormous potential risk existed, especially Tangjiashan barrier lake attracted much attention from all over the country. The barrier lake commonly can cause catastrophic damages to the downstream as well as upstream. The damages include lives and property loss by water level rising in upstream and dam-break flood in downstream. In consideration of the characteristics of barrier dam emergency treatment, the authors evaluated the seepage stability of the barrier dam, and identified the form of seepage failure and extent of induced damage. In addition, seepage analysis has been performed in the case study of Tangjiashan barrier lake in order to provide a reference for the further study on safety assessment of barrier dam.