Análise quantitativa da resiliência a inundações para o planejamento urbano: caso da Bacia do Canal do Mangue do Rio de Janeiro

Abstract

Urban flooding is still, in many cases, treated as a straight consequence of excess rainfall, without considering the watershed functioning as an interdependent system and its interfaces with the development of the territory occupation. The traditional approach implies continuous localized and corrective interventions, post-events, requiring increasingly large investments for the implementation of structures able to accommodate the increased runoff generated by urbanization, with consequent disturbances to the urban area already installed. These efforts have not prevented floods from continuing to cause major damage worldwide, indicating the need for a change in stormwater management strategy from a simple cost-benefit analysis of structural flood control measures to a risk management approach applied to a stormwater management plan, with residual risk internalization, regarding uncertainties inherent in flooding process, such as climate change and urban development. The present research applies flood risk management to analyze the efficiency of urban drainage interventions as an essential tool for territory planning and urban resilience evaluation.