GEOSPATIAL INDEX FOR IDENTIFICATION OF AREAS SUBJECT TO FLOOD IN WATERSHEDS
Natural Disasters; Geoprocessing; Water Resources Management; Inundation; Remote sensing.
Introduction: Climate change causes extreme water events, such as floods. Watersheds may be more susceptible tothe occurrence of these events depending on their climatic, hydrological, geological, morphometric and anthropiccharacteristics. To identify the factors that influence the susceptibility of the basins, geoprocessing tools can be used.Objective: In view of this, the present work proposes to analyze, through the determination of morphometricparameters, the susceptibility to the occurrence of floods in the hydrographic basin of the river Una, located in thestate of Pernambuco, Brazil. Methodology: It is intended to use the QGis software version 3.16, in addition tonumerical equations, to determine the geometric, drainage and relief parameters and perform the characterization ofeach sub-basin of the Una river basin. Results: It was observed that the basin has medium to high susceptibility toflooding, and this result is influenced by all morphometric parameters of each sub-basin. Conclusion: Themethodology presents itself efficiently, presenting results that can be used as public management tools in decision-making on preventive and mitigating measures against socio-environmental and economic damage caused by floodsin watersheds.