Abstract: Luodousha Island is one of the first batches of the nonresidential islands that can be used to exploit and utilize. Luodousha Island is composed of sands. Therefore, it is unstable and its dynamic changes are highlighted. We used 12 remote sensing images spanning from 1973 to 2011, to analyze the dynamic change of Luodousha Island. The research results show that its position, shape and area changed obviously during the past forty years. The dynamic change of Luodousha Island can be roughly divided into three stages. The first was before 1987 and the island was a whole. The second was from 1987 to 2001 and the island was composed of northeastern and southwestern components. The third was after 2001 and the southwestern component of the island disappeared. These monitoring results may provide scientific basis and supporting data for compiling the protection and utilization plan, formulating the specific scheme of exploitation and utilization, putting forward the environmental protection measures. And then they may serve the ecological protection and the related management of Luodousha Island.

Key words: remote sensing images, image processing, dynamic change, information extraction, remote sensing monitoring, Luodousha Island