Floodplain reconstitution based on data collected via smartphones: a methodological approach to hydrological risk mapping

• Autor(a) principal: Ribeiro,Ayane Aparecida da Silva
• Data de Publicação: 2020
• Outros Autores: Oliveira,Gabriel Araujo de, Cirilo,José Almir, Alves,Fellipe Henrique Borba, Batista,Larissa Ferreira David Romão, Melo,Vitor Barbosa
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: RBRH (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312020000100238
• topic: Flood risk map; LiDAR; Hidromapp; Interpolation

ABSTRACT The present study aimed to investigate the use of mobile applications on smartphones, specifically the Hidromapp application, as a technical support tool for flood data collection, as well as its use in flood mapping. To this end, information about a flood event of May 2017 was collected in the municipality of Jaqueira-Pernambuco, using smartphones and the Hidromapp application. Information was later used as input data for modeling and floodplain reconstitution. The study used geoprocessing techniques and a high-resolution Digital Terrain Model (Pernambuco Tridimensional - PE3D). For result evaluation, the reconstituted floodplain was compared with hydrodynamic modeling results using statistical indicators (RMSE and Critical Success Index - C). The app presented a good performance as a support tool for field collection of floodmark data. The applied method allowed a partially adequate estimation of the reconstituted event, in which the flooded area (extension) showed a high degree of similarity with the compared model, but with caveats for water surface elevations, where considerable discrepancies were detected in some points of the study area.