Reconstrução e análise de inundação repentina: um estudo de caso utilizando dados sociais

Abstract

This work proposes alternative techniques for post-flood analysis in ungauged basins with low data availability located in semi-arid regions. The limited number of studies published for these regions motivated this work. We analyzed a post-flood event in a city in Ceará, Brazil, that contains an ungauged basin with extreme rain and the rupture of ten small dams. This study aimed to investigate the possible causes by combining scientific data with the perception of those affected and proposing a simple and applicable methodology for semi-arid regions with low availability of measurement information. For this aim, we conducted field research using statistical analysis, geoprocessing, and HEC-HMS and HEC-RAS models. Satisfactory results were obtained given the available information, serving as an excellent source of information to obtain a quick and low-cost diagnosis for regions that present little data. This integrated approach reveals the need to constantly improve open topography data in addition to hydrological and hydraulic models in small, ungauged basins. This study improved the understanding of post-flood analysis, a useful resource for mitigation and resilience plans in cities facing droughts. Keywords: