期刊
AIMS ENVIRONMENTAL SCIENCE
卷 4, 期 1, 页码 145-167出版社
AMER INST MATHEMATICAL SCIENCES-AIMS
DOI: 10.3934/environsci.2017.1.145
关键词
LULC; LST; urban thermal environment; emissivity; surface urban heat islands
This study investigates the influence of land-use/land-cover (LULC) change on land surface temperature (LST) in Dhaka Megacity, Bangladesh during a period of rapid urbanisation. LST was derived from Landsat 5 TM scenes captured in 1990, 2000 and 2011 and compared to contemporaneous LULC maps. We compared index-based and linear spectral mixture analysis (LSMA) techniques for modelling LST. LSMA derived biophysical parameters corresponded more strongly to LST than those produced using index-based parameters. Results indicated that vegetation and water surfaces had relatively stable LST but it increased by around 2 degrees C when these surfaces were converted to built-up areas with extensive impervious surfaces. Knowledge of the expected change in LST when one land-cover is converted to another can inform land planners of the potential impact of future changes and urges the development of better management strategies.
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