摘要
文章以广西首府南宁市为研究区,选择2015年4月Landsat8 OLI/TIRS多光谱和热红外影像为数据源,图像经辐射定标和大气校正等预处理后采用辐射传导方程法反演地表温度,紧接着利用监督方法进行土地利用/覆盖分类,分析南宁市城市热岛的时空分布特征、地表温度与土地利用/覆盖的关系等相关规律。结果表明:南宁市存在明显的热岛效应,地表温度与土地利用/覆盖有显著关系,地表平均温度表现为裸地>建设用地>草地>耕地>林地>水体,在城市建成区适当增加绿化和水体而积是缓解城市热岛效应的有效方法。
In order to monitor the spatial-temporal distribution of urban heat island effect and discover the relationship between land surface temperature （LST） and land use/land cover （LULC） in Nanning city which is the capital of Guangxi,Landsat80LI＆TIRS imagery in April 2015 were used as the data source.After some pre-process of radiation calibration and atmospheric correction, LST was retrieved using the Radiation conduction equation method and LULC was detected by supervised classification.Results showed that there is obvious heat island effect in Nanning city and the area with strong heat island effect.There is a significant relationship between LST and LULC,the average LST according to the descending order in Nanning city are bare-land, urban, grass,cropland, forest and water.Thus, increasing the proportion of greening and water as appropriate in built up area is an effective method to relieve urban heat island effect.
出处
《大众科技》
2017年第4期27-29,46,共4页
Popular Science & Technology
