Climate Resilience and Benefit–Cost Analysis: A Handbook for Airports (2019) / Chapter Skim
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1 The purpose of this handbook is to help airport practitioners assess the benefits, costs, and financial feasibility of infrastructure projects that are designed to improve resilience to the impacts of climate change and extreme weather events. The handbook presents up-todate methods for conducting benefit–cost and financial feasibility analyses that explicitly recognize risks and uncertainties that are inherent in long-term climate projections and their potential effects on long-lived airport infrastructure.
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Exhibit S-1. Suggested two-step method for evaluating airport climate risk.
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Summary 3 Step 2 in the process is to evaluate the risk more systematically by recognizing the uncertainty inherent in climate projections and considering ways to potentially reduce the impacts through investments (or operational changes)
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4 Climate Resilience and Benefit–Cost Analysis: A Handbook for Airports Water Level Rise (ft) Historical 2025 2035 2045 2055 2065 2075 2085 2095 0-1 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 1-2 3.88% 0.08% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 2-3 68.46% 45.28% 24.68% 8.84% 1.76% 0.40% 0.12% 0.04% 0.00% 3-4 24.16% 46.46% 60.06% 61.94% 48.16% 28.04% 15.24% 9.52% 4.38% 4-5 2.98% 7.24% 13.34% 24.90% 40.38% 50.00% 47.64% 37.10% 29.00% 5-6 0.40% 0.80% 1.76% 3.66% 8.58% 17.68% 27.32% 34.06% 34.94% 6-7 0.12% 0.12% 0.16% 0.52% 1.02% 3.34% 7.72% 13.76% 19.38% 7-8 0.00% 0.02% 0.00% 0.14% 0.10% 0.48% 1.48% 4.20% 8.66% 8-9 0.00% 0.00% 0.00% 0.00% 0.00% 0.04% 0.44% 1.00% 2.76% 9+ 0.00% 0.00% 0.00% 0.00% 0.00% 0.02% 0.04% 0.32% 0.88% TOTAL 100.00% 100.00% 100.00% 100.00% 100.00% 100.00% 100.00% 100.00% 100.00% Median (ft)
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Summary 5 at the airport, it might be worth considering whether a runway extension would make sense to mitigate the implied weight restrictions. The impacts of the events will vary.
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6 Climate Resilience and Benefit–Cost Analysis: A Handbook for Airports in the upper left reports the average net present value and benefit–cost ratio for the project. In this example, conventional decision making would suggest that the project is justified and should be pursued (absent capital constraints)
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