Abstract
Intense rainfall events combined with high tide levels frequently result in urban floods in riverine or coastal cities. Their increasing variability and uncertainty demand urgent but sustained responses. Thus, resilience-driven approaches are emerging in contrast to the traditional technical-economic frameworks, as urban resilience reflects the overall capacity of a city to survive, adapt and thrive when experiencing stresses and shocks. This paper presents a simplified index-based methodology for the evaluation and quantification of urban resilience to flooding, based on the works developed in the EU H2020 RESCCUE project. A set of five indicators are proposed to compute the Integrated Urban Resilience Index (IURI), allowing to classify resilience according to a proposed range of rankings. This methodology considers simultaneously a multisectoral approach, reflecting services interdependences, and a sectorial approach, applying 1D/2D computational modelling of the urban drainage network. It was applied to the study case of Lisbon downtown, involving the analysis of interdependencies between 124 infrastructures of 10 urban services. Two scenarios were considered, respecting the current and future situations, considering climate changes. Results enhance the usefulness, practicability, and potential of the proposed approach, and improvement opportunities were also identified for future developments. Doi: 10.28991/cej-2021-03091647 Full Text: PDF
Highlights
City resilience reflects the overall capacity of a city to survive, adapt and thrive no matter what kinds of chronic stresses or acute shocks they experience [1]
As the main purpose of this study is to evaluate urban resilience in flooding scenarios, the definition of the study area is delimited by the drainage catchments most susceptible to floods
This paper presents a methodology to assess urban resilience to flooding considering simultaneously a multisectoral approach, reflecting services interdependences and cascading effects, and a sectorial approach, applying 1D/2D computational modelling of the urban drainage network
Summary
City resilience reflects the overall capacity of a city (individuals, communities, institutions, businesses and systems) to survive, adapt and thrive no matter what kinds of chronic stresses or acute shocks they experience [1]. Climate changes increase the pressure posed by these risks, namely due to sea level rise, irregularity in rainfall frequency and intensity, droughts, and heat waves [3]. This pressure demands a rapid and informed, sustainable and cohesive response from several stakeholders. The growing diversity of hazards, increasing complexity of cities, and uncertainty associated with climate changes, globalization and rapid urbanization have contributed to introduce urban resilience into a critical agenda [1], reinforcing the need to make cities and human settlements more inclusive, safe, resilient and sustainable [4]
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