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Lopez De La Cruz, J. (author), Calle, E.O.F. (author), Schweckendiek, T. (author)New insights into the failure mechanism piping (under-seepage) regarding the physical process as well as reliability aspects have led to a revision of the Dutch design and safety assessment rules for dikes. This paper describes how the required factor of safety for piping is derived from a top level requirements formulated in terms of an...conference paper 2011