Economic assessment of climate adaptation options for urban drainage design in Odense, Denmark

Climate change is likely to influence the water cycle by changing the precipitation patterns. An increase in potential flood damage in the urban context is anticipated due to the concentrated population and socio-economic values in cities. Feasible adaptation requires a higher performance on flood risk quantification and assessment of appropriated adaptation actions in term of costs and benefits. This paper represents an economic assessment of three prevailing climate adaptation options for urban drainage design in a Danish case study, Odense. A risk-based evaluation framework is used to give detailed insights of the physical and economic feasibilities of each option. Estimations of marginal benefits of adaptation options are carried out through a step-by-step cost benefit analysis. The results are aimed to provide important information to decision making on how best to adapt for urban pluvial flooding due to climate impacts in cities.