Análise quantitativa da vulnerabilidade a inundação a partir de aerolevantamentos com VANTS Multirotores no bairro do Marco, Belém-Pa

Abstract

The city of Belém since its foundation went through an intense process of occupational dynamics, until the epoch that became necessary to occupy lowland or lowland areas. This fact influenced some impacts in certain areas of the city, especially near water bodies due to landings and other anthropic interventions, which generated an imbalance and triggered occurrences related to flooding and flooding in these areas. One of the possible reasons for the lack of implementation of urban planning tools, but one of the ways found to mitigate these disorders, was the macrodrainage works of urban rivers that cut the city. From this, having the help of geotechnology methods as powerful tools for analysis and monitoring of the environment, from the accomplishment of a VANT survey. drone-type multirotor, in an area delimited from the frequency of flood occurrences, generating cartographic products that were the basis for the analysis of the parameters used to determine the degree of vulnerability to flooding of the study area. Four geophysical parameters were used, namely land use and vegetation cover; slopes; proximity to liquid surfaces and altimetris. This made it necessary to use multicriteria analysis tools for this processing, using the Analytical Hierchy Process(AHP), which defined which area characteristics would most impact the process. This made it possible to determine the degree of vulnerability to flooding for the raised Marco Basin region, pointing out that the most vulnerable points to flooding are those with lower levels and closer to the channel, reaffirming the places where floods or floods are most recurrent of the area.