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Article

Economic Analysis of Flood Risk Applied to the Rehabilitation of Drainage Networks

1
Department of Hydraulic Engineering and Environment, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
2
Department of Environment, Land, and Infrastructure Engineering, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
*
Author to whom correspondence should be addressed.
Academic Editors: Tamara Tokarczyk, Mirosław Wiatkowski and Wiwiana Szalińska
Water 2022, 14(18), 2901; https://doi.org/10.3390/w14182901
Received: 16 August 2022 / Revised: 9 September 2022 / Accepted: 14 September 2022 / Published: 16 September 2022
(This article belongs to the Special Issue Flooding in Urban Areas: Risks and Responses)
Over time, cities have grown, developing various activities and accumulating important economic assets. Floods are a problem that worry city administrators who seek to make cities more resilient and safer. This increase in flood events is due to different causes: poor planning, population increase, aging of networks, etc. However, the two main causes for the increase in urban flooding are the increment in frequency of extreme rainfall, generated mainly by climate change, and the increase in urbanized areas in cities, which reduce green areas, decreasing the percentage of water that seeps naturally into the soil. As a contribution to solve these problems, the work presented shows a method to rehabilitate drainage networks that contemplates implementing different actions in the network: renovation of pipes, construction of storm tanks and installation of hydraulic controls. This work focuses on evaluating the flood risk in economic terms. To achieve this, the expected annual damage from floods and the annual investments in infrastructure to control floods are estimated. These two terms are used to form an objective function to be minimized. To evaluate this objective function, an optimization model is presented that incorporates a genetic algorithm to find the best solutions to the problem; the hydraulic analysis of the network is performed with the SWMM model. This work also presents a strategy to reduce computation times by reducing the search space focused mainly on large networks. This is intended to show a complete and robust methodology that can be used by managers and administrators of drainage networks in cities. View Full-Text
Keywords: urban drainage networks; flood; optimization models; economic analysis; network rehabilitation urban drainage networks; flood; optimization models; economic analysis; network rehabilitation
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MDPI and ACS Style

Bayas-Jiménez, L.; Martínez-Solano, F.J.; Iglesias-Rey, P.L.; Boano, F. Economic Analysis of Flood Risk Applied to the Rehabilitation of Drainage Networks. Water 2022, 14, 2901. https://doi.org/10.3390/w14182901

AMA Style

Bayas-Jiménez L, Martínez-Solano FJ, Iglesias-Rey PL, Boano F. Economic Analysis of Flood Risk Applied to the Rehabilitation of Drainage Networks. Water. 2022; 14(18):2901. https://doi.org/10.3390/w14182901

Chicago/Turabian Style

Bayas-Jiménez, Leonardo, F. Javier Martínez-Solano, Pedro L. Iglesias-Rey, and Fulvio Boano. 2022. "Economic Analysis of Flood Risk Applied to the Rehabilitation of Drainage Networks" Water 14, no. 18: 2901. https://doi.org/10.3390/w14182901

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