Based on the case study of Banqiao River left levee

a feasible approach to risk analysis for seepage failure in levees with deterministic seepage FEM was proposed

according to which risk analysis of seepage failure was carried out

and an evaluation of seepage stability was made. The proposed approach could avail itself of the advantage of FEM

and calculate the downstream hydraulic gradient more accurately while considering the soil distribution more actually than those conventional approaches. With the theory of extreme point combination-monotonicity and “3?” Rule

the critical hydraulic gradient

critical risk coefficient of seepage failure and alarm water level for flood prevention in flood season for Banqiao River levee were set up by the failure case in 1995; that are of great significance to seepage stability evaluation. The analytical approach and the results will be practical and helpful in practice of seepage stability evaluation for flood control engineering.