Another hidden danger is the weakening of the impervious ability of the dam resulting from the closeness of the height of line seepage of the reservoir water level to the contact plane between the residual solum, talus solum and basement rocks.

• 水库水位浸润线标高和残坡积土与基岩接触界面标高较接近，而使此高程的防渗能力更加薄弱，这也是此坝体的隐患之一。