Use of UAV in the generation of flood maps in the municipality of Alegre (Espírito Santo)

https://doi.org/10.25100/eg.v0i30.15182

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Published: Nov 11, 2025
Issue: No. 30 (2025): Julio - Diciembre 2025 (30)
Section Artículos (Espacios y Territorios)

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Authors

  Tiago Trevenzoli Siqueira Federal University of Espírito Santo, Alegre, Brazil.
  Fabricia Benda de Oliveira Federal University of Espírito Santo, Alegre, Brazil.
  Carlos Henrique Rodrigues de Oliveira Federal Institute of Espírito Santo, Alegre, Brazil.
  Pâmela Silva da Purificação Federal University of Espírito Santo, Alegre, Brazil.
  Joubert Almeida Monteiro Federal University of Espírito Santo, Alegre, Brazil.
  Gabriel Soares Lopes Gomes Federal University of Espírito Santo, Alegre, Brazil.
Abstract

The problems of flooding are recurrent due to natural river overflows and inappropriate occupation of riverbank areas, leading to numerous economic and social losses. The municipality of Alegre, located in the southern region of the state of Espírito Santo and part of the Itapemirim River basin, frequently suffers from these types of disasters. In this context, areas with flooding potential were mapped for the municipality of Alegre-ES, including the districts of Rive, Celina, and Café, using an unmanned aerial vehicle (UAV) as a data collection tool. For the development of the study, pluviometric data were collected, and a rainfall map was generated. Using the UAV, orthophotos of the area of interest were collected, and a Digital Surface Model (DSM) was created. Finally, flood points were calculated, and cross-sectional profiles were delineated, resulting in the flood map for the event that occurred in 2022. The results showed that during periods of intense precipitation, areas near the river are affected by flooding. This work highlights the importance of the UAV tool for obtaining DSMs, enabling the creation of detailed flood maps, which are fundamental for environmental risk prevention and control.

Keywords
  • Remotely Piloted Aircraft (RPA)
  • Digital Surface Model (DSM)
  • orthomosaic
  • Itapemirim river basin
Author Biographies

Tiago Trevenzoli Siqueira, Federal University of Espírito Santo, Alegre, Brazil.

Undergraduate student in Information Systems at the Federal University of Espírito Santo (UFES), with a scholarship from FAPES. His main areas of work are Remote Sensing, Geotechnologies and Remotely Piloted Aircraft Systems.

Fabricia Benda de Oliveira, Federal University of Espírito Santo, Alegre, Brazil.

Associate Professor II, Ph.D. in Crop Production at the Federal University of Espírito Santo (UFES). Permanent Professor in the Graduate Programs in Public Management and Geography at the same institution. Her main areas of expertise are Public Management, GIS, Geoprocessing, and Geotechnologies.

Carlos Henrique Rodrigues de Oliveira, Federal Institute of Espírito Santo, Alegre, Brazil.

Full Professor, Ph.D. in Forest Sciences at the Federal Institute of Education, Science and Technology of Espírito Santo (Ifes) – Alegre campus. Permanent Professor in the Graduate Program in Agrochemistry at UFES and in the Graduate Program in Agroecology at Ifes – Alegre campus. His main research interests include Geoprocessing, Silviculture and Forest Nurseries.

Pâmela Silva da Purificação, Federal University of Espírito Santo, Alegre, Brazil.

Master’s student in Geography at the Federal University of Espírito Santo (UFES) and specialist in Cartography and Remote Sensing from the Metropolitan College of the State of São Paulo. Her main areas of work are Education and Geotechnologies.

Joubert Almeida Monteiro, Federal University of Espírito Santo, Alegre, Brazil.

Master’s student in Public Management at the Federal University of Espírito Santo (UFES) and specialist in Public Administration from the Federal Institute of Education, Science and Technology of Espírito Santo. He also holds an MBA in Business Management from the Luiz de Queiroz College of Agriculture (ESALQ/USP). His main research areas are Investigation, Research, Fire Prevention, and Geotechnologies.

Gabriel Soares Lopes Gomes, Federal University of Espírito Santo, Alegre, Brazil.

Postdoctoral researcher in Geography at the Federal University of Espírito Santo (UFES). His main fields of work are Geoprocessing, Silviculture, Forest Nurseries, and Agroforestry Systems.

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How to Cite
Tiago Trevenzoli Siqueira, Benda de Oliveira, F., Carlos Henrique Rodrigues de Oliveira, Pâmela Silva da Purificação, Joubert Almeida Monteiro, & Gabriel Soares Lopes Gomes. (2025). Use of UAV in the generation of flood maps in the municipality of Alegre (Espírito Santo). Entorno Geográfico, (30), e20815182. https://doi.org/10.25100/eg.v0i30.15182
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