Medeiros, Joana Darc Freire deAlmeida, Rosa Ticiane de Oliveira2019-11-252019-11-252019-07-30ALMEIDA, Rosa Ticiane de Oliveira. Mapeamento de perigo de inundação incorporando o indicador tempo. 2019. 47f. Dissertação (Mestrado em Engenharia Sanitária e Ambiental) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2019.https://repositorio.ufrn.br/jspui/handle/123456789/27989Unplanned urbanization and the consequent river banks undue occupation have caused material, environmental and socio-economic damage to society due to floods. Therefore, to predict with confidence the hydrological system behavior and the impacts of each flood event on the anthropic activities is important to minimize these damages. To do this, a flood hazard mapping can be done. The works that involve the topic usually use frequency, depth and speed as main indicators. However, the flood duration is also a relevant parameter, because long duration floods can cause soil erosion, water pollution and agricultural crops loss. Thus, the objective of this research is to do, using as study site the low course of the Piranhas-Açu River, a flood hazard mapping that considers beyond the usual criteria, the time of permanence of water. For this, was done the river hydraulic modeling with the HEC-RAS software, that provided velocity, depth and duration flood maps for 5, 10, 20, 50 and 100 years return period. From the hazard map for each return period the hazard map of the region was obtained, based on the frequency-weighted average. The indicators hazard maps for each return period were useful, and it was possible to verify the influence of each indicator on the flooding hazard. However, the methodology for generating the global map decreased the flooding hazard, causing the map showing low hazard. The results indicate that the floods reach high depths, that the water flows slowly, resulting in high duration time flood.Acesso AbertoMapa de perigoTempo de duração da inundaçãoHEC-RASmasterThesisCNPQ::ENGENHARIAS::ENGENHARIA SANITARIA