Urban heat island effect and its influencing factors based on Landsat remote sensing data：A case of Xiangyang city

doi:10.14088/j.cnki.issn0439-8114.2019.16.010

Abstract

Abstract: Based on Landsat 8 TIRS remote sensing image, the surface temperature of Xiangyang city was retrieved by remote sensing technology, and the intensity index of heat island effect was calculated. The spatial and temporal distribution characteristics and development trend of urban heat island effect in Xiangyang city were analyzed quantitatively. The correlation between normalized vegetation index（NDVI）, normalized building index（NDBI） and surface temperature were analyzed. The influence of surface vegetation distribution and building density on urban heat island effect was analyzed. The results showed that the urban heat island effect in Xiangyang city gradually strengthens between 2014 and 2017, and the heat island diffusion mainly extends to the new urban development zones and the extension of traffic network. There was a negative correlation between urban surface temperature and normalized vegetation index, and a positive correlation between urban surface temperature and normalized building index, especially between urban surface temperature and normalized vegetation index. It is suggested that in the process of urban development and construction, strengthening urban greening investment, reasonably increasing urban vegetation coverage and moderately reducing urban building density can alleviate the urban heat island effect.

Key words: normalized difference vegetation index, normalized building index, surface temperature, urban heat island effect, Xiangyang city

CLC Number:

TP79

LI Xue-min, WEN Li, WANG Li-xuan. Urban heat island effect and its influencing factors based on Landsat remote sensing data：A case of Xiangyang city[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(16): 41-48.

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