Centrifuge model tests were carried out to investigate the pore water pressure response and hydraulic fracturing in earth dams, caused by a rapid increase in the height of reservoir water during flooding. Earth dam behavior at failure duringflooding is discussed to consider whether sliding of soil mass, interior erosion (piping) of fill materials or exterior erosion by the action of over-flow water is the most influential factor in the failure process. Transmission of pore water pressure inthe fill is associated with its permeability and the rate of reservoir filling, which is another important subject to be discussed how and to what extent it may cause such catastrophic damages.
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