Page 45 - Design Considerations Based on Quantitative Risk Assessments for Slopes
P. 45

Quantitative Risk Assessment




               Risk Analysis




                 The estimated fatalities, N could be estimated by:


                              N = V x Total N
                                       DT
               where,

               •V       is the vulnerability of the person to the landslide event
                   DT



               Various F-N pairs are then calculated such that:

                              F =  f for N         1      (most serious event)
                                        1
                                1
                              F =  f + f      2
                                       1
                                2
                              F =  f + f + f , and so forth
                                                      3
                                               2
                                        1
                                3
               where,
               •N is the estimated fatalities with N > N > N                                   3
                                                                              1
                                                                                       2
               •f is the estimated annual frequency of each event

               •F is the cumulative frequency of N or more fatalities per annum
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