基于LandsatTM数据南宁城市热岛效应研究

A Study of Urban Heat-island Effect of Nanning City Based on Landsat TM Data

以Landsat5TM遥感影像作为数据源,结合遥感与地理信息系统技术,反演得到南宁市城区地表温度等级图。从反演结果可以看出:南宁市城区热岛效应十分明显,高温区和次高温区主要集中在快速环道以内,低温区主要分布在植被覆盖度比较高的郊区、公园、农田等地,并对减少城市热岛效应提出建议。

With the remote sensing image of Landsat5 TM as the data source, the urban land surface temperature grade map of Nanning city is obtained by inversion combining with the technologies of remote sensing （RS） and geographic information system （GIS）. The result indicated that Nanning city is suffering from very obvious urban heat-island effect. The high tem- perature area and sub-high temperature area is mainly concentrated within the express ring road and the low temperature area is generally distributed in the suburbs, park, farmland and so on in there the vegetation coverage rate is relatively high. Some suggestions for reducing the urban heat - island effect is put forward.