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

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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.

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CITATION STYLE

APA

Ribeiro, A. A. da S., de Oliveira, G. A., Cirilo, J. A., Alves, F. H. B., Batista, L. F. D. R., & Melo, V. B. (2020). Floodplain reconstitution based on data collected via smartphones: A methodological approach to hydrological risk mapping. Revista Brasileira de Recursos Hidricos, 25, 1–13. https://doi.org/10.1590/2318-0331.252020190179

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