The Study On Remote Sensing Technology Of Natural Forest Change Monitoring In Hainan Bawangling

Natural forest protection issues related to sustainable economic and social development,is a global consensus for environmental protection. China is the world's countries with low forest cover, forest protection is very serious. Since the national implementation of the Natural Forest Protection Program in 1998, forest resource have improved. However, the huge natural forest resources, how to use the limited resources for effective management and protection are still great difficulties. Therefore, to natural forest monitoring is very important. With the Earth observation technology's rapid development, use of remote sensing to monitor forest change has been able to achieve. Remote sensing monitoring tools have developed from low or medium spatial resolution to high spatial resolution. Using remote sensing for forest monitoring, not only from the view over the whole dynamic of natural forests, small areas of change detection is also possible.This study aimed to explore the use of remote sensing data of different resolution, on the region of Hainan Bawangling to monitor forest changes during natural forest protection project. Useing the characteristics of tropical forest, this study try to explore the combination of medium resolution remote sensing and high resolution remote sensing monitoring methods, to provide some reference for natural forest protection project. At the macro monitoring, the study use TM remote sensing data to extract landscape types, and to analyze landscape conversion and landscape index. In the micro-monitoring, natural forest sensitive areas were selected, to monitor small area of forest cover change and extract forest cover change plots.Monitoring results show that from 1998 to 2006, Hainan Bawangling region was an increasing trend of forest area. Well preserved natural landscape in general, reduce fragmentation, human disturbance weakened were concluded. From landscape conversion analyse, encroachment from artificial forest to natural forests are still existed. In natural forests sensitive areas of frequent human activities, during 2007 to 2009 forest cover reduce plots have increased a small amount. It is needed to strengthen the management and monitoring of this area.