Análise espaço-temporal das ilhas de calor urbanas de superfície na cidade de Cuiabá-MT

Abstract

The effect of Surface Urban Heat Island has been the subject of several studies in recent decades and in various cities around the world, being typically microclimatic phenomena in urban areas. Identifying which districts have the highest SUHI peaks helps to devise strategies to mitigate this effect and improve the quality of life of the inhabitants of that region.This research propose the analysis of the space-time of the SUHI in the city of Cuiabá-MT. In order to carry out this study, images of the orbit 226 of point 71 were obtained on the dates of 01/22/90, 10/01/09 (hot-wet period) and 02/08/90, 06/08/09 (hot-dry-period). From the image processing, surface temperature charts, NDVI and Soil Use and Occupancy for the city of Cuiabá were generated to analyze the transformation dynamics that occurred in the study region. A comparative analysis was made of the administrative regions of the urban area of Cuiabá and their respective neighborhoods. Through the profile developed for the study area, the spatial and temporal increase of the surface temperatures in the more wooded periphery direction to the center with higher population and constructive density was perceptible, resulting in a difference of 4 ° C between these areas. Some neighborhoods such as Morada da Serra, Campo Velho, Residencial Santa Inês and Pedregal had the Intensity of the Surface Urban Heat Island (SUHI) characterized as strong, with values higher than 5 ° C. These neighborhoods have urban densities and little vegetation. The neighborhoods that presented the lowest values of SUHI, being classified as weak, were Bela Marina, Cachoeira das Garças and São Gonçalo Beira Rio, these neighborhoods are located in areas with high concentration of vegetation. Thus, the results of the SUHI studies can be used to plan how best to reduce the impacts of rising urban temperatures.