摘要
以娄底市区为例,基于LandSat5 TM定量反演了城市亮度温度,采用Quick Bird数据解译了城市绿化现状,通过研究亮度温度与绿化覆盖率的关系,对城市绿化规划布局进行了探讨。研究表明:娄底市城区热岛效应显著,热岛中心主要分布在旧城区,最高温度为30.78℃;城市亮度温度与绿化覆盖率呈现负相关,相关系数为-0.9,通过提高城市绿化率等方法可以有效缓解城市热岛效应;城市绿地系统应根据娄底城市热场分布的特点,有重点、有针对性地进行规划布局,建立完善的城市绿地系统是改善城市热环境的根本保证。
Taking Loudi as an example,based on LandSat5 TM image data,quantitative inversion of the city＇s brightness temperature,based on Quick Bird data,interpretation of the status quo of urban greening.By analyzing the relationship between brightness temperature and green coverage,study the Urban Thermal Island effect.The layout of urban greening are discussed.Studies have shown that： Urban Thermal Island effect significant Thermal Island centers are mainly located in the old city.The maximum temperature reached 30.78℃,higher than the rural minimum temperature 5.51℃.Priority is to alleviate the Thermal Island effect the old city.The district brightness temperature deviation mean value was positively correlated with the vegetation cover ratio and the correlation coefficient is-0.9,by improving the urban greening and other methods can effectively alleviate the Urban Thermal Island effect,reduce the Urban Thermal Island effect caused harm.Loudi urban green space system should be based on the characteristics of urban thermal field distribution to carry out a focused,targeted planning.To improve the environment of the urban heat the fundamental guarantee is the establishment of a sound urban green space system.
出处
《城市勘测》
2010年第6期71-75,共5页
Urban Geotechnical Investigation & Surveying
基金
湖南省建设厅"园林城市遥感调查示范研究项目"(2007-10)
关键词
热岛效应
亮度温度
绿化覆盖率
绿地系统规划
娄底市
Urban Thermal Island
Lightness Temperature
Green Coverage
Green Space System Planning
Loudi City
