Mapeamento de áreas suscetíveis à inundação em Santa Maria, RS

• Ano de defesa: 2016
• Autor(a) principal: Fernandes, Nadinne da Silva
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; BR; Geografia; UFSM; Programa de Pós-Graduação em Geografia
• Palavras-chave em Português: Suscetibilidade à inundação; Bacia hidrográfica; Processo analítico hierárquico; Susceptibility to flooding; Watershed; Analytical hierarchy process; CNPQ::CIENCIAS HUMANAS::GEOGRAFIA
• Link de acesso: http://repositorio.ufsm.br/handle/1/9458

The occurrence of natural phenomena such as floods and floods are gaining alarming proportions in recent years, bringing as a result of social and economic losses. Considering the subsidy in the Geographic Information Systems (GIS) provide for the generation of information and decision making, this geotechnology is in a tool that can assist in the planning of the geographical space. Thus, this research seeks from the digital terrain modeling (DTM) of the watershed Arroio Cadena and Picadinha, located in the city of Santa Maria, Rio Grande do Sul and multi-criteria method Hierarchy Process Analytic (AHP), identify susceptible areas the flood phenomenon. To do this, proceed to the acquisition of contour data, elevation points, hydrography, soil type and satellite images (RapidEye). Manipulation of the data resulted in the hierarchy of hydrography as Shreve, map of soil types in the study area, from satellite images obtained map of the use and occupation of land and generation of MDT, providing maps of slope and hypsometry. Thus, through the variables generated, there was a multi-criteria analysis (AM), which is the intersection of the generated maps and consequently the identification of areas susceptible to the occurrence of the flood event of the watershed Arroio Cadena and Picadinha. From the identification of these areas it was possible to estimate the population that is inserted. Based on these results, it is believed that the techniques and methods used can provide subsidies and soffits for future studies and aid in monitoring the study area.