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Are we preventing flood damage eco-efficiently? An integrated method applied to post-disaster emergency actions
Petit Boix, Anna; Arahuetes, Ana; Josa Garcia-Tornel, Alejandro; Rieradevall Pons, Joan; Gabarrell Durany, Xavier
Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental; Universitat Politècnica de Catalunya. MECMAT - Mecànica i Nanotecnologia de Materials d'Enginyeria
Flood damage results in economic and environmental losses in the society, but flood prevention also entails an initial investment in infrastructure. This study presents an integrated eco-efficiency approach for assessing flood prevention and avoided damage. We focused on ephemeral streams in the Maresme region (Catalonia, Spain) to determine the feasibility of post-disaster emergency actions implemented after a major event in hydrologic, environmental and economic terms. Life cycle assessment (LCA) and costing (LCC) were used to determine the eco-efficiency of these actions, and their net impact and payback were calculated by integrating avoided flood damage. Results showed that the actions effectively reduced damage generation when compared to the water flows and rainfall intensities registered. The eco-efficiency of the emergency actions resulted in 1.2 kg CO2eq. per invested euro. When integrating the avoided damage into the initial investment, negative net impacts were obtained (e.g., -5.2E+05 € and -2.9E+04 kg CO2 eq. per event), which suggests that these interventions contributed with environmental and economic benefits to the society. The economic investment was recovered in two years, whereas the design could be improved to reduce their environmental footprint, which is recovered in 25 years. Our method and results highlight the effects of integrating the environmental and economic consequences of decisions at an urban scale and might help the administration and insurance companies in the design of prevention plans and climate change adaptation.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Riscos geològics
Flood control
risk management
life cycle assessment
life cycle costing
damage prevention
climate change
Inundacions -- Control
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/submittedVersion
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