湖北农业科学 ›› 2021, Vol. 60 ›› Issue (5): 48-52.doi: 10.14088/j.cnki.issn0439-8114.2021.05.009

• 资源·环境 • 上一篇    下一篇

基于Landsat数据热岛效应与植被的关系研究--以开封市为例

徐畅1, 高荣2   

  1. 1.河南农业大学林学院,郑州 450000;
    2.中国电建集团华东勘测设计研究院有限公司,杭州 311122
  • 收稿日期:2020-10-26 出版日期:2021-03-10 发布日期:2021-03-22
  • 通讯作者: 高荣,男,高级工程师,硕士,主要从事水土保持、水环境治理研究,(电子信箱)gao_r@hdec.com。
  • 作者简介:徐畅(1995-),女,河南郑州人,在读硕士研究生,研究方向为林业3S技术,(电话)13526494376(电子信箱)xc643503015@163.com;
  • 基金资助:
    国家自然科学青年基金项目(41201210); 河南省科技攻关计划项目(172102110056; 192102310184)

Research on the relationship between heat island effect and vegetation based on Landsat data:Taking Kaifeng city as an example

XU Chang1, GAO Rong2   

  1. 1. College of Forestry,Henan Agricultural University,Zhengzhou 450000, China;
    2. Power China Huadong Engineering Corporation Limited, Hangzhou 311122, China
  • Received:2020-10-26 Online:2021-03-10 Published:2021-03-22

摘要: 随着城市经济的不断发展,城市热岛现象日益严重,不仅制约社会经济绿色健康发展,而且危害人体健康。基于Landsat5、Landsat8数据,利用大气校正法对河南省开封市地表温度进行反演,分析开封市热环境空间分布,并对该市植被覆盖度进行空间变化分析,以期为开封市城市绿色健康规划建设及缓解热岛效应提供借鉴。结果表明,开封市城市热岛效应明显,高温由开封市区向祥符区、尉氏县、通许县、杞县、兰考县扩散;从各区热环境分布看,开封市年平均气温和高温区面积均呈升高趋势,开封市中温区、次高温区面积显著增加,次低温区面积显著减少,城区气温增加速度大于郊区,为热岛的形成提供了热量基础。地表温度与植被覆盖呈负相关,因此在开封市经济建设过程中应对城镇土地使用合理规划、加强城镇绿地规划、增加城镇绿地覆盖度、选用透水地面铺装以缓解开封市热岛效应。

关键词: 归一化植被指数(NDVI), Landsat数据, 热岛效应, 地表温度, 大气校正法

Abstract: With the continuous development of economy, the urban heat island phenomenon is becoming more and more serious, which not only restricts the green and healthy development of the social economy, but also harms the human health. Based on the data of Landsat5 and Landsat8, the spatial distribution of thermal environment in Kaifeng city was analyzed by using the method of atmospheric correction, and the vegetation cover in Kaifeng city was analyzed, in order to provide reference for green health planning and construction and mitigation of the heat island effect of Kaifeng city. The results showed that the urban heat island effect in Kaifeng city was obvious, and the high temperature mainly concentrated in the urban area of Kaifeng and spreaded to Xiangfu district, Weishi county, Tongxu county, Qi county and Lankao county. The areas of annual average temperature and high temperature zone in Kaifeng were on an upward trend. The areas of middle and sub-high temperature zones in Kaifeng increased significantly, the areas of sub-low temperature zones decreased significantly, and the increase speed of air temperature in urban area was faster than that in suburban area, which provided heat basis for the formation of heat island. There was a negative correlation between land surface temperature and vegetation cover, therefore, in the process of Kaifeng’s economic construction, we should make rational planning for urban land use, strengthen the planning for urban green space, increase the coverage of urban green space, and choose permeable pavement to alleviate Kaifeng’s heat island effect.

Key words: normalized difference vegetation index(NDVI), Landsat data, heat island effect, land surface temperature, atmospheric correction

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