基于强度分析方法的秀山岛土地利用/覆盖变化研究

本文收集了1970、1992、2003和2014年4期卫星遥感影像,利用遥感解译和GIS技术提取秀山岛土地利用/覆盖信息,运用强度分析方法,从时间、类型和转换3个层次统计分析秀山岛土地利用/覆盖变化。结果显示:秀山岛主要的土地利用类型分别为林草地、耕地、建设用地和滩涂;1970—2014年期间,土地转换速率呈先加速后减速的特征;各土地利用类型在不同时间段表现特点各异;耕地转换为建设用地是最主要的土地利用类型转换方式。规划政策、经济和人口从业结构等社会人文因子是秀山岛土地利用/覆盖变化的主要影响因子。

Study on the land use/cover changes in Xiushan Island based on intensity analytical method

By using RS and GIS technology, four satellites remote sensing images of 1970, 1992, 2003 and 2014 were used to create the maps of land use status in Xiushan Island. Intensity analytical method was applied to quantify the annual intensity of the changes at three levels: time interval, category, and transition. The results show that forest and grass land, cropland, construction land and tideland are the main types in Xiushan Island. Overall, the transforming rate of land use type increases initially and then decreases afterwards. The main directions of land use type transfer were the conversions from cropland to construction land. Analyses of the results reveal that the land use change is associated with the land policy, economic growth and employment structure.