Fig. 3: Cost and robustness analysis of heightening strategies.
From: Neglecting uncertainties biases house-elevation decisions to manage riverine flood risks
a Total cost and the optimal elevation under assumptions of ignoring-uncertainty (dashed magenta line and the hollow point) and considering-uncertainty (solid magenta line, shaded bounds, and the filled point). The considered hypothetical house is 1500 ft2 with a worth of $300 K and with the lowest floor at four feet below the Base Flood Elevation. Under the ignoring-uncertainty assumption, the house lifetime and discount rate are assumed to be 30 years and 4% per year, respectively. The vertical line indicates the FEMA-recommended heightening strategy. The hatched gray area on the left refers to elevating the house by less than three feet which we assume is impractical in this study. b Robustness of different objectives are shown by dashed lines. The solid red line indicates the robustness of all objectives.
