兰州中心城区用地扩展及其热岛响应的遥感分析

生态学杂志 ›› 2011, Vol. 30 ›› Issue (11): 2597-2603.

兰州中心城区用地扩展及其热岛响应的遥感分析

潘竟虎**,韩文超

西北师范大学地理与环境科学学院，兰州 730070

出版日期:2011-11-08 发布日期:2011-11-08

Urban expansion and its heat island response in Lanzhou City based on remote sensing analysis.

PAN Jing-hu**, HAN Wen-chao

College of Geographic and Environmental Science, Northwest Normal University, Lanzhou 730070, China

Online:2011-11-08 Published:2011-11-08

摘要/Abstract

摘要： 以兰州中心城区为研究区，以1978、1993、2001和2010年的Landsat MSS/TM/ETM⁺影像为数据源，采用NDBI-SAVI指数相结合的方法，提取建设用地信息，利用热红外波段的单窗算法反演城市地表温度。结合城市热岛比例指数和地表温度分级，定量研究城镇用地扩张对城市热环境的影响。结果表明：兰州中心城区建设用地在1978—2010年的30余年间面积由87.47 km²增加到172.61 km²，增幅近1倍。城市扩展与热岛扩展趋势具有空间一致性，在城市扩张的同时，城区地表温度逐渐上升，城市热岛面积不断扩大。

Abstract: This paper quantitatively analyzed the effects of urban expansion on city thermal environment, taking the urban area of Lanzhou City as a case, and based on the 1978, 1993, 2001 and 2010 Landsat/TM and ETM⁺ images. The information of urban construction land was extracted by using NDBI-NDVI index, and the land surface temperature was retrieved via mono-window algorithm, with the urban heat-island ratio index and the land surface temperature grade maps built. In 1978-2010, the construction land in the central area of Lanzhou City increased from 87.47 km² to 172.61 km², and the urban expansion had a spatial consistency with the urban heat island expansion. At the same time of urban expansion, the urban surface temperature increased gradually, and the heat island area had an increasing expansion.

Key words: Polytrichum juniperinum, History reconstruction, Population dynamics

潘竟虎,韩文超. 兰州中心城区用地扩展及其热岛响应的遥感分析[J]. 生态学杂志, 2011, 30(11): 2597-2603.