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首页> 外文期刊>Environmental Monitoring and Assessment >Land use/land cover change and land surface temperature of Ibadan and environs, Nigeria
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Land use/land cover change and land surface temperature of Ibadan and environs, Nigeria

机译：尼日利亚伊巴丹及周边地区的土地利用/土地覆被变化和地表温度

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Rapid urbanization is having a considerable impact on various aspects of living, thereby altering the biophysical environment. This study adopted the use of remote sensing technique and geographical information system (GIS) to analyse the relationship between changing land use/land cover and land surface temperature in a rapidly urbanizing tropical city of Ibadan between 1984 and 2019. Landsat series TM, ETM+, and OLI satellite imageries of Ibadan region city for 1984, 2002, and 2019, respectively, were obtained from the US Geological Survey (USGS) Landsat series of Earth Observation satellites accessible on the Google earth engine (GEE) platform. Supervised classification was done using a random forest (RF) machine learning classifier in the GEE platform. Surface emissivity maps were obtained from the normalized difference vegetation index (NDVI) thresholds method and land cover information. The surface emissivity based on NDVI classes was used to retrieve land surface temperature (LST). The results showed an increase in urban cover from 341.72 km(2) in 1984 to 520.58 km(2) in 2019 with an average increase in land surface temperature from 17 degrees C to 38 degrees C, respectively. Temperature sampling in the north-south and west-east transect revealed that highly urbanized areas located at the city centre of Ibadan have the highest LST of about 38 degrees C. It dissipates to about 19 degrees C at the suburb that is less built up. A significant negative relationship exists between the health condition of vegetation (NDVI) and LST with a correlation coefficient of r = - 0.95. The study confirms the potential application of GIS and remote sensing for detecting urban growth as well as relates growth impact to LST, thereby suggesting that fitting strategies will be important for the sustainable management of the urban areas.
机译：快速的城市化对生活的各个方面都产生了重大影响，从而改变了生物物理环境。这项研究采用遥感技术和地理信息系统（GIS）来分析1984年至2019年伊巴丹快速城市化热带城市土地利用/土地覆盖率与地表温度变化之间的关系。Landsat系列TM，ETM +，分别从美国地质调查局（USGS）的Landsat系列地球观测卫星（可在Google地球引擎（GEE）平台上访问）获得1984年，2002年和2019年伊巴丹地区城市的OLI和OLI卫星图像。监督分类是在GEE平台中使用随机森林（RF）机器学习分类器完成的。表面发射率图是通过归一化植被指数（NDVI）阈值方法和土地覆盖信息获得的。使用基于NDVI类别的表面发射率来检索陆地表面温度（LST）。结果显示，城市覆盖范围从1984年的341.72 km（2）增加到2019年的520.58 km（2），平均地表温度分别从17摄氏度增加到38摄氏度。在南北和东西方样带的温度采样显示，位于伊巴丹市中心的高度城市化地区的LST最高，约为38摄氏度。在建筑较少的郊区，其耗散到约19摄氏度。植被健康状况（NDVI）与LST之间存在显着的负相关关系，相关系数为r =-0.95。这项研究证实了GIS和遥感技术在检测城市增长以及将增长影响与LST相关方面的潜在应用，从而表明，合适的策略对于城市的可持续管理非常重要。

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