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From page 88... ... 88 Introduction to Study Level 2 Analysis A Study Level 2 analysis builds on a Study Level 1 analysis. A Study Level 2 analysis uses existing conditions without climate change only to calculate the new return period for future conditions with climate change, that is, the maximum return period under climate change conditions for which no damages will occur, Tf. Read the entire page →
From page 89... ... Study Level 2 Climate Resilience Cost-Benefit Analysis 89 Complete Level 1 Analysis The same numerical example used in Chapter 7 will be used to illustrate a Study Level 2 analysis. A Study Level 2 analysis begins by using the same data and calculations as in a Level 1 analysis. Read the entire page →
From page 90... ... 90 Incorporating the Costs and Benefits of Adaptation Measures in Preparation for Extreme Weather Events and Climate Change -- Guidebook Qf Tf Interpolated Damages, Df Base Case Future Annualized Damages, Daf Tc Damages (in Current $) Annualized Damages, Dac Qc (cfs) Read the entire page →
From page 91... ... Study Level 2 Climate Resilience Cost-Benefit Analysis 91 These results mean that under assumed climate change conditions, a flow of 10,505 cfs will have a return period of 62 years, as opposed to 100 years under current conditions, and a flow of 13,982 cfs will have a return period of 260 years under assumed climate change conditions, as opposed to 500 years under current conditions. Adding these points to the graph from the Study Level 1 analysis (Figure 21) Read the entire page →
From page 92... ... 92 Incorporating the Costs and Benefits of Adaptation Measures in Preparation for Extreme Weather Events and Climate Change -- Guidebook 3. A Study Level 2 analysis adds the impacts that a hazard mitigation or resilience action could have on damages to the asset or corridor after the resilience action has been implemented to accommodate the modeled climate change conditions. Read the entire page →
From page 93... ... Qf Tf Interpolated Damages, Df Base Case Future Annualized Damages, Daf Qr Tr Damages, Dr (in current $) Resilient Future Annualized Damages, Dar Tc Damages (in Current $) Read the entire page →
From page 94... ... Qf Tf Interpolated Damages, Df Base Case Future Annualized Damages, Daf Qr Tr Damages, Dr (in current $) Resilient Future Annualized Damages, Dar Tc Damages (in Current $) Read the entire page →
From page 95... ... Study Level 2 Climate Resilience Cost-Benefit Analysis 95 9. For the resilience measure to be cost-effective, the NPV of the benefits minus the costs must be greater than 0. Read the entire page →
From page 96... ... 96 Incorporating the Costs and Benefits of Adaptation Measures in Preparation for Extreme Weather Events and Climate Change -- Guidebook and the present value of benefits is $12.7 million, yielding an NPV of $11.0 million and a BCR of 7.3. The data for the scenario were applied to a Study Level 2 analysis approach as described in this chapter: • The current condition discharges used in the Study Level 2 analysis were taken from Table 8.3 in HEC-17 for Observed 1980–2009 conditions (see Table 33) Read the entire page →
From page 97... ... Study Level 2 Climate Resilience Cost-Benefit Analysis 97 • Unlike HEC-17, which used 1,000 Monte Carlo simulations, the following Study Level 2 analysis used just one fixed scenario. • Based on the information for adaptation Option 1 (i.e., increasing four cells to six) Read the entire page →
From page 98... ... 98 Incorporating the Costs and Benefits of Adaptation Measures in Preparation for Extreme Weather Events and Climate Change -- Guidebook 4. Calculate the adjusted return periods for the future conditions ("Wetter" narrative) Read the entire page →
From page 99... ... Study Level 2 Climate Resilience Cost-Benefit Analysis 99 Qf "Wetter" Narrative w/ Future LU 2070– 2099 (ft3/s) Tf Interpolated Damages, Df Base Case Future Annualized Damages, Daf Tfnd 3,170 7 $0 $0 Max return period resulting in no damages T'fnd 4,100 11 $15,500,000 $440,446 Return period resulting in moderate damages Tfmod 4,480 13 $17,000,000 $266,759 Return period resulting in maximum damages Tfmax 5,710 25 $17,000,000 $604,776 7,050 50 $17,000,000 $340,000 7,840 100 $17,000,000 $170,000 Future (Climate Change) Read the entire page →
From page 100... ... 100 Incorporating the Costs and Benefits of Adaptation Measures in Preparation for Extreme Weather Events and Climate Change -- Guidebook Qf "Wetter" Narrative w/Future LU 2070– 2099 (ft3/s) Tf Interpolated Damages, Df Base Case Future Annualized Damages, Daf Damages, Dr (in current $0) Read the entire page →
From page 101... ... Study Level 2 Climate Resilience Cost-Benefit Analysis 101 So, the NPV of the benefits associated with implementing the Option 1 adaptation project is $12,423,854. The NPV of the project is equal to the difference between the benefits and the costs, which in this case were $1,700,000, so NPV of the project is $10,723,854. Read the entire page →
From page 102... ... Tf (Year) Read the entire page →

From page 88...

... 88 Introduction to Study Level 2 Analysis A Study Level 2 analysis builds on a Study Level 1 analysis. A Study Level 2 analysis uses existing conditions without climate change only to calculate the new return period for future conditions with climate change, that is, the maximum return period under climate change conditions for which no damages will occur, Tf.