Proposta de metodologia para mapeamento de risco geológico – geotécnico de escorregamentos em João Pessoa – PB

Abstract

João Pessoa municipality, the largest economic and financial center in Paraíba State, presents annually several episodes of landslides, natural and / or induced disasters that could be avoided or mitigated through the use of monitoring technologies, implementation of structural measures and prevention. In this sense, risk management is one of the most effective measures to favor the identification and qualification of risk, as well as to enable the choice of more effective and adequate solutions. Therefore, the objective of this research is to develop a methodology of geological-geotechnical risk mapping of landslides specific to João Pessoa. Initially, the relevant characteristics of the physical and biotic environment of the city (soil, climate, geomorphology) were evaluated. In a second analysis, were studied the criteria considered fundamental to obtain the degree of risk, according to the Ministério das Cidades, and the population's ability to perceive the risk of sliding. Each of these parameters were assigned weights, where the sum of weights results in literal levels of risk, facilitating the final determination of the degree of risk, and the union of these resulted in the construction of an inspection form. The final phase consisted in carrying out an evaluation of the methodology proposed to attest its safety and efficiency. The results showed that the methodology for geological-geotechnical risk mapping of landslides in Joao Pessoa has technical artifices and subsidies that make it more realistic, judicious, less subjective and easy to use, when compared to other methodologies used in Brazil.