北京西城区下垫面与城市热岛的关系研究

Study on the Relationship Between the Underlying Surface And the Urban Heat Island InXicheng District of Beijing

采用遥感卫星影像数据,对北京西城区地面热场状况进行研究。通过对遥感影像进行信息提取和分类,建立西城区热岛分布图,分析城市热岛的分布和强度特征;进行不同类型下垫面热特性的系统测定,对热岛效应与城市下垫面绿化分量、道路、水体的关系进行分析;研究西城区热岛的发生规律、影响因素和缓解热岛的措施。

This paper has discussed the ground heat field in Xicheng district of Beijing by the method of remote sensing sat- ellite image data. The remote sensing information has been extracted and classified, heat island distribution map of Xicheng district has been established to analyze the distribution and strength characteristics of the city heat island. Then the system determination for different types of underlying surface thermal characteristics has been carried out, relation- ships between heat island effect and city underlying surface green component, road and water have been analyzed. At last, the heat island occurrence, influencing factors and the measures to alleviate the heat island are discussed.