4Vanmarcke . E. H. Bohnenblust. H. Risk-based Decision Analysia in dam safety [ M ]. massachusetts institute of technology depart- ment of civil engineering 1982,112.
5National Research Council ( U. S. ). committee on the safaty of Ex- isting Dams Safety of existing dams: evaluation and improvement[ M ]. National Academies, 1983.
6Bureau of Reclamation use of risk analysis , Applicastion of Fre- quency and Risk [ M]. Prrett, 1987.
