Navegando por Orientadores "PESSOA, Francisco Carlos Lira"

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Acesso aberto (Open Access)
Avaliação a suscetibilidade de deslizamento de terra na bacia hidrográfica do Rio Trombetas via lógica fuzzy
(Universidade Federal do Pará, 2018-04-03) VIEIRA, Artur Sales de Abreu; PESSOA, Francisco Carlos Lira; http://lattes.cnpq.br/8031687016215046
The landslides are defined as rapid mass movements, which present a well-defined rupture plane causing considerable social and economic damages worldwide each year. The phenomena of mass instabilisation are conditioned by many factors, such as climate, lithology and rock structures, pedology, morphology, anthropic action and others. Prevention actions such as the effective warning system and the establishment of areas susceptible to these processes are necessary because they can minimise the losses and damages caused by these disasters. In this sense, the objective of this research was to elaborate a map of the susceptibility of the landslide to the Trombetas River basin through fuzzy logic, since the area of study is of great economic interest, mainly to the exploration mineral. We used a Geographic Information System (GIS) environment software and the MATLAB in Mamdani type Fuzzy Inference System (FIS) to develop a qualitative model for predicting susceptibility and critical thresholds of landslide warning scenarios. Seven (7) input parameters were included in the model, characterising the topographic, pedological and environmental conditions. The results showed that in the Trombetas River basin there are areas classified as very low (14.11%), low (47.23%), moderate (35.08%), high (0.20%) and very high (3.39%) susceptibility of the landslide.
Desconhecido
Inter-relações entre variáveis ambientais e doenças de veiculação hídrica no Município de Belém-Pa
(Universidade Federal do Pará, 2022-11-09) VARELA, Andrew Wallace Palheta; PESSOA, Francisco Carlos Lira; http://lattes.cnpq.br/8031687016215046
The theme related to health and the environment is gaining more and more prominence in the scientific environment, since man is sensitive to the constant changes in the environment that surrounds him. The spatial and temporal variations of climatic elements, as well as the worsening of socio-environmental problems, provide specific environmental conditions and, consequently, can favor the emergence of diseases related to water transmission, such as leptospirosis and dengue, especially in regions with peculiar climatic characteristics and serious problems of environmental and social nature, for example, the city of Belém-PA. Thus, the objective of this work is to correlate environmental variables with the occurrence of waterborne diseases, in the 21st century (2001 to 2019), in the municipality of Belém, state of Pará, as well as to identify possible associations of health problems arising from the basic sanitation conditions of the locality. For this, a survey was carried out of the number of monthly cases of leptospirosis and dengue, through the Information System of Notifiable Diseases (SINAN) and Municipal Health Department (SESMA), as well as the variables precipitation, temperature and relative humidity, through the National Institute of Meteorology (INMET) and, subsequently, the following methodologies are applied: descriptive statistics, Spearman's correlation coefficient (ρ), Principal Component Analysis (PCA), Multiple Regression Analysis, spatialization by IDW interpolation and the assessment of basic sanitation conditions. The results show a similar monthly behavior of the variables: precipitation, relative humidity and minimum temperature; and dengue and leptospirosis; with a greater number of cases in the rainy season in the region. Furthermore, with the exception of the minimum temperature, there was a correlation between the environmental variables and the diseases studied in this work. It was also observed the precariousness of sanitation conditions experienced by residents of some neighborhoods in Belém, which facilitates the proliferation of transmitting vectors. In this sense, it is inferred that seasonality may indicate a possible contribution to the rates of the mentioned diseases, especially in the rainy season, leading to an increase in the number of cases, however, for the municipality of Belém, this factor is not limited to the variable variable, but to a series of environmental and climatic conditions relating to the period in question. Furthermore, it is estimated that this study will serve as a reference for other research, as well as contribute to the development of solutions that minimize the problem.