Spatiotemporal dynamics of land use/land cover(LULC)changes and its impact on land surface temperature:A case study in New Town Kolkata,eastern India  

作　　者：Bubun MAHATA Siba Sankar SAHU Archishman SARDAR Laxmikanta RANA Mukul MAITY 

机构地区：[1]Department of Geography,Ravenshaw University,Cuttack,753003,India [2]Department of Geography,Sri Krushna Chandra Gajapati(Autonomous)College,Paralakhemundi,761200,India

出　　处：《Regional Sustainability》2024年第2期26-48,共23页区域可持续发展（英文）

基　　金：the University Grants Commission,New Delhi,India,for providing financial support in the form of the Junior Research Fellowship。

摘　　要：Rapid urbanization creates complexity,results in dynamic changes in land and environment,and influences the land surface temperature(LST)in fast-developing cities.In this study,we examined the impact of land use/land cover(LULC)changes on LST and determined the intensity of urban heat island(UHI)in New Town Kolkata(a smart city),eastern India,from 1991 to 2021 at 10-a intervals using various series of Landsat multi-spectral and thermal bands.This study used the maximum likelihood algorithm for image classification and other methods like the correlation analysis and hotspot analysis(Getis–Ord Gi^(*) method)to examine the impact of LULC changes on urban thermal environment.This study noticed that the area percentage of built-up land increased rapidly from 21.91%to 45.63%during 1991–2021,with a maximum positive change in built-up land and a maximum negative change in sparse vegetation.The mean temperature significantly increased during the study period(1991–2021),from 16.31℃to 22.48℃in winter,29.18℃to 34.61℃in summer,and 19.18℃to 27.11℃in autumn.The result showed that impervious surfaces contribute to higher LST,whereas vegetation helps decrease it.Poor ecological status has been found in built-up land,and excellent ecological status has been found in vegetation and water body.The hot spot and cold spot areas shifted their locations every decade due to random LULC changes.Even after New Town Kolkata became a smart city,high LST has been observed.Overall,this study indicated that urbanization and changes in LULC patterns can influence the urban thermal environment,and appropriate planning is needed to reduce LST.This study can help policy-makers create sustainable smart cities.

关 键 词：Urbanization Land use/land cover (LULC)changes Land surface temperature Urban heat island Hotspot analysis Smart city 

分 类 号：X16[环境科学与工程—环境科学]