城市土地利用的热环境效应研究——以宁波城区为例

选取宁波城区为研究对象,利用高分辨率的QUICKBIRD多光谱影像数据与Landsat ETM 热红外波段数据探求城市地区土地利用类型的热环境效应。采用剖面分析方法表征宁波城区的热环境空间分异状况;通过热环境效应总体贡献指数与面积加权贡献指数定量分析各种土地利用类型对城市热环境的正负效应。结果表明宁波城区存在热岛效应,建设用地内部地表温度差异明显;工矿仓储用地、平房住宅、交通运输用地、未利用地与公共建筑用地对宁波城区热环境效应具有正向贡献,其中工矿仓储用地最为明显;水域、农用地、生活居住用地和城市绿地对于城市热环境效应具有减缓作用,其中水域最为显著。

Thermal Environment Effect of Land Use in Urban Area:A Case Study in Ningbo Urban Area

High spatial resolution remote sensing data from both QUICKBIRD and Landsat ETM is utilized to assess urban area land use and associated thermal effects by taking Ningbo urban area as a case study. To depict the spatial characteristics of urban thermal environment, the profile analysis is used. Total heat effect index and weighted heat effect index are utilized to definitude the positive and negative thermal effects of each land use type quantitatively. Analysis results suggest that urban heat island effect exists in Ningbo urban area. However, there is obvious difference among surface radiant temperature of each constructed land types. Industry land, old resident land, traffic land and unused land have positive effects on thermal environment, and the positive thermal effect of industry land is the most remarkable. Water body, plantation, new resident land and urban green land have negative effects on thermal environment, and the negative thermal effect of water body is the most remarkable. Areas with high surface radiant temperature in Ningbo urban area include three types: high energy consuming areas, centre of human and materials, and high radiance areas.