摘要
以不透水面扩展为主要标志的城市扩张对城市热环境产生显著影响,针对特殊垫面的扩张与热环境效应的定量关系目前鲜有研究。本文以不透水面兼沙地盐碱地结构的齐齐哈尔市为研究区,利用Landsat影像提取城区热岛垫面数据,探究城市热环境特征对热岛垫面扩张的响应差异。结果表明:1)1987—2017年齐齐哈尔热岛垫面扩张远多于不透水面面积,多出的范围沿嫩江河谷和东南部的沙地盐碱地方向扩展。2)齐齐哈尔地表温度与热岛垫面增长格局有较强的一致性,极高温区、高温区多分布在城区范围并向嫩江及东南部扩散。3)热岛垫面与地表温度之间存在明显的正相关关系。研究结果可为城市热岛效应的缓解对策探究提供理论参考,也可为改善城市环境质量、城市建设决策提供科学依据。
Urban expansion with the expansion of impervious surface as the main indicator has a significant impact on the urban thermal environment, and there is little research on the quantitative relationship between the expansion of special pad surfaces and thermal environmental effects. In this paper, Qiqihar City, which has an impermeable surface and a sandy saline-alkali land structure, is taken as the research area. Landsat images are used to extract the urban heat island surface data, and to explore the response differences of urban thermal environment characteristics to the expansion of the heat island surface. The results show that:(1) From 1987 to 2017, the expansion of the pad surface of Qiqihar heat island was much larger than that of the impervious surface, and the excess area expanded along the direction of the Nenjiang River Valley and the sandy saline-alkali land in the southeast.(2) The surface temperature of Qiqihar has a strong consistency with the growth pattern of the heat island surface, and the extremely high temperature areas and high temperature areas are mostly distributed in the urban area and spread to the Nenjiang River and the southeast.(3) There is an obvious positive correlation between the surface of the heat island and the surface temperature. The research results provide a theoretical reference for the exploration of mitigation strategies of urban heat island effect, and provide a scientific basis for improving urban environmental quality and urban construction decision-making.
作者
吴凡
吴相利
WU Fan;WU Xiangli(Faculty of Geographical Science,Harbin Normal University,Harbin 150025,China)
出处
《测绘与空间地理信息》
2022年第11期134-138,143,共6页
Geomatics & Spatial Information Technology
关键词
热岛垫面
热环境效应
回归分析
遥感
齐齐哈尔
heat island surface
thermal environment effect
regression analysis
remote sensing
Qiqihar
