Study On The Landscape Pattern Change And Urban Heat Island In Macau

With the rapid developments of population and social economy, demans of extending land areas caused continuously sprawl of urban area and changes of landscape pattern. Urban landscape patterns change brought forth changes within many natural and ecological processes and influned human living quality, especially in the coastal urban areas with large population and less land area, such as Macau SAR in China. For these reasons, it is significant important to conduct study on the landscape pattern change and its influences on urban environment.Taking Macau landscape pattern change and urban heat island as a case in point, the objectives of this study is to probing the effect of sea reclamation on landscapepattern and urban heat island surported by information retrieved from remote sensed data, and present basis for urban planning and city environmental quality improvement. The main contents of this paper including: 1) Dynamic monitoring of urban landscape and analizing of landscape pattern. 2) Retrieval of urban heat island and its temporal change. 3) Analysis of the effect of landscape pattern change on the urban heat island distribution.The main findings of the study are as follows: 1) Urban landscape pattern in Macau has been changed obviously in recent years caused by sea reclamation and urban construction. The urban landscape became fragmentized and areas of each landscape types became decreased greatly. 2) According to retrieval results of remote sensing, the total area of urban heat island in Macau had been increased year by year. It had increased from 2.91 km~2 in 1995 to 4.03km~2 in 2008. The increase rate is about 2.6% per year. 3) The spatial distribution of urban heat island in Macau has a close relationship with urban landuse change caused by sea reclamation. The urban heat island mainly distributed in the construction regions, such as central part of Hua Wangtang district, north part of Feng Suntang district, airport, Luhuan power plant, bare land and construction sites caused by sea reclamation since 1995. Increasing of bare land and construction sites together with insufficient vegetation coverage are main reasons for urban heat island extension.