Estudo do comportamento térmico da área urbana no município de Dois Vizinhos - PR

Abstract

The present work had as objective to analyse the thermical behavior, evaluating 3 strees of downtown part and one out of center, in Dois Vizinhos-PR city, aiming to comprehend the relations of urban planning and the temperature, in order to provide information that can be used in the landscape planning and the urbanistic planning of the city. Three busiest streets were selected to be analysed: 7 de Setembro Avenue, João Dalpasquale Street and Castro Alves Street. Also Atanásio Pires Street was selected, with the biggest amount of trees ; one kilometer from downstown approximately to measure the variables and compare them to the measures taken in downtown area and data from the meteorological station in UTFPR, rural area in the municipality of Dois Vizinhos-PR. The evaluation occured during 12 months, and the measures were taken each 15 daus, for 3 consecutive days in each evaluation. In each street the variables were measured in three points, totalizing 12 points of measurements by day of evalutation. The variables measured: air temperature (ºC) relative air humidity (%), Wind speed (m/s), surfasse temperature (ºC) and the light intensity (lux). The measures occured on 6 different times, at six, 06, 09, 12 a.m., 03, 06 and 09 p.m. Data from the rural area were statistically analyzed with data from the urban area. After the evaluations, all the data were processed and analyzed statistically through the Tukey and Friedman tests, at a significance level of 5% of error, through the Sofware ASSISTAT 7.6 and SASM-Agri. The results obtained from the data colected in field and compared to the rural area data demonstrated the interference of the urbanization in the local microclimate and how much the urban mesh interferes in the winds speed influencing in the air temperature and the formation of urban heat islands. The main strategy to mitigate the effects of the heat island is the increase of green areas, creating new parks and through the urban trees.