Relationship between the Land Surface Temperature and Land Cover Types, a Case Study in Hanoi City, Vietnam

This paper presents the results of an assessment of the relationship between the temperature of the central part of the city of Hanoi and the type of urban surface. Landsat TM and Landsat 8 images collected from 2000 to 2019 are used to calculate the land surface temperature of the study area, as well as indices characterizing the land cover (NDVI), built-up area (NDBI), and water surface (MNDWI). The correlation coefficient between the surface temperature and the NDVI, NDBI, and MNDWI is calculated. The results show that the vegetation cover and the water surface are inversely correlated with the surface temperature, which is expressed by the negative values of the correlation coefficient. On the other hand, the built-up area has a positive correlation with the surface temperature, as is shown by the positive values of the correlation coefficient. During the entire observation period, the correlation coefficient between temperature and housing density according to the NDBI has been constantly increasing and reached its highest level in 2019. Other indices are characterized by a relative constancy of values. The results of the study show the possibility of using the NDBI to assess the housing density and can be used to rationally manage the land use of urban areas.