Work

Flood Vulnerability Assessment in Ungauged Watersheds: a Simple Approach Using Regional Functions and 1D Hydraulic Modelling

Year: 2025

Type: article

Abstract: In this study, we identified flood risk areas using maximum streamflow estimates derived from regional functions and 1D hydraulic modelling in an urban ungauged watershed in Lavras, Minas Gerais, Brazil. Our approach focused on employing simple techniques based on secondary data to support flood risk management in regions lacking hydrological monitoring and technical expertise. The study evaluated two maximum streamflow regional functions developed for the Grande River Basin to identify the most suitable for flood mapping. Flood maps for 5, 10, 50 and 100-year return periods were created using the software HEC-RAS and we assessed population vulnerability under current and regulated land use scenarios. By using simple techniques and secondary data, this work provides a practical approach for decision-making in cities with limited resources, highlighting the need for improved urban drainage and flood risk management.

Source: Revista Brasileira de Geografia Física

DOI: 10.26848/rbgf.v18.4.p2551-2572

Authors: Gabriela Rezende de Souza, Luiz Fernando Coutinho de Oliveira, Jhones Da Silva Amorim, Alice Raquel Caminha, Flávia Vilela Corrêa, Lucas Ribeiro Guimarães

Institutions: Universidade Federal de Lavras, Universidade Federal do Rio Grande do Norte

Language: English

Topic: Flood Risk Assessment and Management

Subfield: Global and Planetary Change

Field: Environmental Science

Domain: Physical Sciences

SDGs: Sustainable cities and communities, Clean water and sanitation

Open Access status: gold

Estimated APC paid: $38