测绘通报 ›› 2021, Vol. 0 ›› Issue (3): 60-68.doi: 10.13474/j.cnki.11-2246.2021.0079

• 学术研究 • 上一篇    下一篇

利用Landsat卫星影像进行东莞市地表温度反演与变化分析

陈明辉   

  1. 东莞市地理信息与规划编制研究中心, 广东 东莞 523129
  • 收稿日期:2020-04-22 出版日期:2021-03-25 发布日期:2021-04-02
  • 作者简介:陈明辉(1978—),男,博士,教授级高级工程师,主要研究方向为自然资源与城乡规划、GIS和遥感应用及智慧城市。E-mail:79131489@qq.com
  • 基金资助:
    国家自然科学基金(41401432);广东省省级科技计划(2017A020217003)

Land surface temperature inversion and change analysis of Dongguan using Landsat images

CHEN Minghui   

  1. Dongguan Geographic Information & Urban Planning Research Center, Dongguan 523129, China
  • Received:2020-04-22 Online:2021-03-25 Published:2021-04-02

摘要: 随着快速城市化进程,我国东南沿海一些城市新增了大量的城市建设用地,影响到了城市的人居环境,诱发了城市热的环境问题。探索城市热环境时空布局与变化特征,分析变化原因对城市可持续发展和人居环境质量改善具有重要的现实意义。本文以东莞市为例,以1986—2017年间8个时相Landsat系列卫星影像为数据源,利用单通道算法对东莞市地表温度进行定量反演,分析东莞城市热环境的时空分布特征及其变化,并探讨其影响因素。结果表明,东莞市30多年的城市热环境主要表现为热岛的分布格局,由零散的点状分布逐渐发展成沿着主要交通路线的带状分布;东莞市城镇/街道中心的地表温度明显高于郊区、村落,存在较强的热岛效应;1986—2017年东莞市的热岛比例指数总体呈上升趋势,从0.06上升到0.15,在2009年东莞市热岛效应达到最高。研究结果对合理规划东莞城市建设,促进城市建设可持续发展等方面具有重要意义。

关键词: 城市热环境, 单通道算法, 东莞, Landsat卫星影像, 地表温度

Abstract: With the rapid urbanization process, a large number of construction land has been added in some cities along the southeast coast of China, and the urban human settlements have been affected causing urban thermal environment problems. It is of great practical significance for the sustainable development of cities and the improvement of the quality of human settlements to study the spatial and temporal distribution and change characteristics of urban thermal environment and analyze the causes of changes. In this paper, taking 8 temporal Landsat satellite images from 1986 to 2017 as data sources, the surface temperature of Dongguan city is quantitatively inversed by single channel algorithm, and the spatial-temporal distribution pattern and change characteristics of the thermal environment of Dongguan city are analyzed and the influencing factors are analyzed. The results show that in the past 30 years, the urban thermal environment in Dongguan city has developed from scattered point distribution to belt distribution along the main traffic routes; the surface temperature in the town/street center of Dongguan city is significantly higher than that in the suburbs and villages, and there is a strong heat island effect; the proportion index of heat island in Dongguan city has an overall upward trend, from 0.06 in 1986 rose to 0.15 in 2017, with the highest heat island effect in Dongguan in 2009. The results of the study are of great significance to the rational planning of Dongguan city construction and the sustainable development of urban construction.

Key words: urban thermal environment, single channel algorithm, Dongguan, Landsat satellite image, surface temperature

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