GIS ANALYZES ON THE URBAN HEAT ISLAND AND NEWLY BUILT AREAS THE CITY OF IASI

Abstract

The purpose of this work is to determine and evaluate how the newly built areas, in the municipality of Iasi, in the period 2016-2021, are affected by the Urban Island. The Urban Heat Island (UHI) represents the phenomenon of higher atmospheric and surface temperatures occurring in urban area or metropolitan area than in the surrounding rural zones due to urbanization.The data acquisition stage involved extracting construction data from the unique integrated national system of cadastre and real estate advertising, extracting data on buildings and green spaces from orthophotoplans, obtaining data from public service providers regarding utility networks, performing GNSS determinationsand extraction of temperature data for the city of Iasi for the period studied, in order to establish the urban heat island. MODIS satellite images were used to establish the urban heat island. All of the previously mentioned data were inserted into a GIS application and various analyzes and queries were performed. During the studied period, the temperature inside the heat island was 24-C during the night, and 34-C during the day. It was observed that the urban heat island was formed around the intensively built area in the middle of the studied area. It was found that the newly built areas in the city of Iasi are located in the area of the Urban Heat Island, which mainly occupies the central area of the city. This phenomenon is much more evident during the night. Also, the green spaces in the newly built area are insufficient to mitigate the effects of the heat island. I also specify the fact that the municipality of Iasi still does not comply with the regulation regarding the existence of a minimum of 20 square meters of green space per inhabitant. Based on the study, it can be concluded that, in the future, the local administration will no longer have to allow the construction of buildings in the area affected by the urban heat island, because the temperatures during the period when UHI affects the environment are very high and difficult to bear.