Economic Impact Assessment for Enhancing Resilience of Drainage Structures under Changing Climate Conditions in Brazilian Cities

Código

XXV-SBRH1170

Autores

Abderraman Róger Amorim Brandão, Alan Alves Barros, Juliana dos Santos Poloni, Joao Luiz de Andrade Areias, Julio Cesar Pereira Cantarelli, Maria de Andrade Rocha Alencar Castro, Marcos Roberto Benso, Mateo Hernández Sánchez, Paulo Berardo Pessoa de Souza Filho, Eduardo Mário Mendiondo

Tema

22 - Mudanças Climáticas, Adaptabilidade e Impactos

Resumo

In the context of hydraulic works, the pursuit of a new level of assertiveness to achieve resilient infrastructure in the face of climate change has become crucial to ensure investment efficiency and minimize the damages resulting from these transformations. However, the understanding of the relationship between investment costs and damages for the resilience of hydraulic works from the perspective of climate change remains limited. This study analyzes the behavior of damage and investment costs in culvert drainage works across four cities in Brazil, considering their resilience and risks throughout their lifespan. A performance of investments and costs incurred by failures was evaluated by conducting a cost survey, comparing stationarity and non-stationarity of precipitation events at different return periods, and conducting a literature review. The results indicate varying progress in investment implementation across cities, and the literature review highlighted gaps and challenges in producing accurate cadastral data, conducting risk assessments, and investing in stormwater management and urban drainage. It was found that the optimal return period for the all cities shifted forward by due to climate change. This study provides valuable insights for municipal authorities in their cost management decision-making processes and helps designers determine an ideal return period to enhance the resilience of infrastructure projects.