Use the damage–frequency relationships in Table 13. 15 for flood control alternatives to rank their merits on the basis of expected flood damage reduction.

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TABLE 13.15 Damage-Frequency Relationships in Problem 12 Exceedance Probability (%) Damage ($10) Damage ($10) Damage ($106) Damaged ($106) Damage ($106) 22752 20 0 0 0 0 10 6 0 0 0 00 10 0 0 0 0 13 13 2 4 3 22 22 10 12 10 1 30 30 20 18 12 0.5 40 40 30 27 21 0.2 50 50 43 40 35 0.1 54 54 47 43 45 0.05 57 57 55 50 56 a-e Damages sustained corresponding to each exceedance probability if the first-fifth alternative is implemented, respectively.