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通过收集资料和地质勘察，对永定河滞洪水库存在的主要工程地质问题进行分析评价。认为水库以暂时性渗漏为主，各建筑物基础均为细砂层，当地震烈度为８°，砂层饱和状态时将发生液化危害，需地基处理。且由碱活性试验砂浆棒检测法可知，砂砾料属可能具有潜在碱活性危害。
Through the collection of data and geological survey, the main engineering geological problems existing in the Yongding River detention flood reservoir are analyzed and evaluated. It is considered that the reservoir is dominated by temporary leakage and the foundation of each building is fine sand layer. When the seismic intensity is 8 °, the liquefaction hazard will occur when the sand layer is saturated, and the ground treatment is required. And by alkaline activity test mortar rod test shows that sand and gravel may have potential alkali activity hazards.