【作者】 王琳；

【导师】 徐涵秋；

【作者基本信息】 福州大学 ， 地图学与地理信息系统， 2006， 硕士

【摘要】 本文以福建省省会城市福州及其毗邻地区为研究对象,以1996年9月6日和2003年5月29日的TM / ETM+影像以及1996年5月13日和2003年12月14日的SPOT影像为数据源,利用遥感技术手段对福州市进行地面信息的提取与分析,并在地理信息系统(GIS)和全球定位系统(GPS)的辅助下开展了土地利用变化、城市扩展、城市热岛效应以及蒸发(散)量等多方面的专题研究。利用构建的修正归一化水体指数(MNDWI)、归一化建筑指数(NDBI)以及土壤调节植被指数(SAVI)等3个指数波段,通过压缩数据维的方式对城市建成区进行提取。城市扩展变化的分析结果显示,从1996年到2003年,福州市的建成区面积增长了86.9km~2,扩展变化基本上与《福州市城市总体规划(1995-2010)》相吻合。利用TM / ETM+影像的热红外波段反演出地面亮温,并利用城市热岛比例指数(URI)对福州市的城市热岛效应情况进行定量分析。结果表明研究区的城市热岛指数从1996年的0.44增长到2003年的0.48,城市热岛效应有所增加。利用陆面能量平衡模型(SEBAL)进行研究区的区域蒸发(散)量反演,并研究了其与城市扩展、植被覆盖变化和城市热岛效应之间的关系,发现它们之间有较为明显的负相关性。更多还原

【Abstract】 Remote sensing technology has been used in this thesis to study the land use changes and urban expansion of the Fuzhou area in SE China in the years from 1996 to 2003. The urban heat island and evaporation/transpiration information of the area were also extracted and related to the land use change and urban expansion to see their interaction for the urban heat environmental changes during this period. The study was based on two Landsat TM/ETM+ images acquired on September 6, 1996 and May 29, 2003 respectively and a SPOT 5 multispectral image dated on December 14, 2003. To reveal urban expansion areas, the original 7-band TM/ETM+ image was compressed into a 3-band image using the band-dimension compression technique. The 3 new bands were derived from three thematic indices, which are Soil Adjusted Vegetation Index (SAVI), Modified Normalized Differences Water Index (MNDWI), and Normalized Differences Built-up Index (NDBI). A supervised classification was carried out on this new 3-band image and the urban built-up lands were extracted from the classified maps. The results show that the urban area of Fuzhou City has increased by 86.9 km~2 during the seven-year study duration. The expanded areas are generally coordinated with the City’s Planning. The at-satellite temperatures of the study years were derived from the thermal infrared bands of the two Landsat images. The Urban-heat-island Ratio Indexes of two study years (URI) were further computed for the city. The results reveal that the URI has increased from 0.44 to 0.48, indicating an increase in urban heat island distribution area from 1996 to 2003. The regional evaporation/transpiration was also computed using the Surface Energy Balance Algorithm for Land (SEBAL). This indicates a great decrease in evaporation/transpiration in the expanded urban areas. The correlation analysis among evaporation/transpiration, urban heat island and vegetation changes within the expanded urban areas shows that both evaporation/transpiration and vegetation are negatively correlated with the urban heat island.更多还原