American Society of Civil Engineers

Application of Fuzzy Sets Method to Identify Seepage Path through Dams

by L. Opyrchał, (Inst. of Meteorology and Water Mgmt., 00-692 Warszawa, Oleandrów 6, Poland. E-mail:

Journal of Hydraulic Engineering, Vol. 129, No. 7, July 2003, pp. 546-548, (doi:

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Document type: Technical Note
Abstract: Based on probabilistic assessment of the consistency of piezometer water level increments and decrements, a piezometer membership function of a fuzzy set is introduced. By investigating the membership of the Tresna water reservoir piezometers in a fuzzy set, the watertightness of the seepage curtain was assessed, and, following the maximum degree of membership from headwater to tailwater, a seepage path through the left abutment of the Dobczyce dam was determined.

ASCE Subject Headings:
Fuzzy sets
Water levels