Hazard classification, social and economic losses in flooded urban areas

Autor(es)

Ferreira, Mauricio Jonas ; da Rocha, Humberto Ribeiro

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION; v. 120, p. 15-pg., 2025-03-15.

Resumo

The spatial and temporal evolution of hazard maps is crucial for issuing flood alerts and activating contingency plans. Hazard classification maps were generated in the HEC-RAS ((Hydrologic Engineering Center - River Analysis System) model using Depth-Velocity (DV) data. Economic damages and loss of life were estimated in the HEC-FIA (Hydrologic Engineering Center - Flood Impact Analysis) model, calibrated with social and economic data from various government agencies. The study revealed hazardous areas with varying DV values. Regions with H2 (DV <= 0.6) were unsafe for small vehicles, while areas with H5 (DV <= 4.0) posed risks for vehicles, people, and buildings. Areas with H6 (DV > 4.0) were classified as highly hazardous. Direct economic losses were estimated at $376,040.00 for 15 structures, including $213,430.00 for structural damage, $127,990.00 for interior damage, and $34,620.00 for vehicle damage. Between 97 % and 99 % of individuals received warning messages, and all mobilised and nonmobilised individuals survived. (AU)

• Processo FAPESP: 21/11762-5 - Centro para Segurança Hídrica e Alimentar em Zonas Críticas
• Beneficiário: Humberto Ribeiro da Rocha
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Ciência para o Desenvolvimento
• Processo FAPESP: 19/23853-5 - Riscos e oportunidades regionais de mudanças do uso da terra e das mudanças climáticas aos serviços ecossistêmicos hídrico-climáticos: investigação para bacias na Caatinga e na Mata Atlântica do Sudeste
• Beneficiário: Humberto Ribeiro da Rocha
• Modalidade de apoio: Auxílio à Pesquisa - Regular