References 19-33 Table P19.3.1 Exceedance probability Damage Q (cfs) Stage (ft) ($109 20 10 7 5 2 1 0.5 0.2 0.1 0.05 12,000 14.000 15,000 16.000 18,000 20,000 22.000 25,000 26.000 28,000 30 33 34 35 38 40 42.5 45 46 47 0 6 10 13 22 30 40 50 54 57 costs in column (4). The remaining values in this column are determined by subtracting the incremental damage cost of the corresponding year from the total value for the previous return period. 19.4.1 Using the following frequency-discharge-storage- damage data in Table P19.3.1 for a river reach to determine the frequency-discharge relationship for the following scenarios. a. Determine the damage-frequency relationship if a levee system with a capacity is considered. b. Determine the damage-frequency relationship for a diver- sion that will protect up a natural flow of 15,000 cfs. c. Determine the damage-frequency relationship considering channel modifications that would increase the conveyance for flows up to 15.000 cfs. 19.4.2 The following Table P19.4.2 listing the results of annual damages, benefits, and costs as a function of return period for a 19.3.2 Using the information in Table P19.3.2 determine the References 19-33 Table P19.3.1 Exceedance probability Damage Q (cfs) Stage (ft) ($109 20 10 7 5 2 1 0.5 0.2 0.1 0.05 12,000 14.000 15,000 16.000 18,000 20,000 22.000 25,000 26.000 28,000 30 33 34 35 38 40 42.5 45 46 47 0 6 10 13 22 30 40 50 54 57 costs in column (4). The remaining values in this column are determined by subtracting the incremental damage cost of the corresponding year from the total value for the previous return period. 19.4.1 Using the following frequency-discharge-storage- damage data in Table P19.3.1 for a river reach to determine the frequency-discharge relationship for the following scenarios. a. Determine the damage-frequency relationship if a levee system with a capacity is considered. b. Determine the damage-frequency relationship for a diver- sion that will protect up a natural flow of 15,000 cfs. c. Determine the damage-frequency relationship considering channel modifications that would increase the conveyance for flows up to 15.000 cfs. 19.4.2 The following Table P19.4.2 listing the results of annual damages, benefits, and costs as a function of return period for a 19.3.2 Using the information in Table P19.3.2 determine the