Document Type : علمی - پژوهشی
Authors
1 Student of Ferdowsi University of Mashhad
2 Professor of Geography and Urban Planning, Ferdowsi University of Mashha
3 Assistant Professor of Geography and Urban Planning Ferdowsi University of Mashhad
4 Assistant Professor of Geography and Urban Planning, , Ferdowsi University of Mashhad
Abstract
Due to the rapid increase in the population, cities have faced many problems, including the lack of urban green space and its role in improving the quality of the urban environment. These spaces, which are referred to as the breathing lungs of cities, are known as one of the most important urban land uses . Considering the importance of urban green space, the present study was conducted with the aim of spatial analysis of the relationship between environmental variables and green space in Mashhad city in order to improve the capability of the urban environment in 2019. The study method in this research is a descriptive analytical method that has investigated the relationship between variables by using linear regression in TerrSet software, Therefore, in the first step, after receiving air pollution concentration data on a daily basis and applying the necessary corrections to on them, the average annual data for each of the stations was calculated in the Excel environment, and according to the point-wise nature of the data, with the interpolation method in GIS, the distribution and distribution of pollutants was prepared in the form of a map. Then., in order to check the relationship between each of pollutants and temperature with the existing green space of the same raster format, the normalized difference index layer of vegetation cover and ground surface temperature for the year 2019 were extracted by Landsat Eight satellite images, then using linear regression the correlation coefficient of each pollutant (nitrogen dioxide, sulfur dioxide, suspended particles smaller than two and a half microns) and our green space were measured. The results show that despite the negative relationship obtained from the correlation coefficient between green spaces, pollutants and temperature, it can be said that green spaces have played an effective role in reducing pollution in Mashhad.
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