1990年以来我国大陆海岸线变迁及分形维数研究

Historical changes of the length and fractal dimension of Chinese coastline since 1990

选取1990年以来的9期的遥感影像共计371景,提取大陆海岸线数据,分析了海岸线长度历年变迁规律及分形维数的变化,得出以下结论:(1)近22 a来,我国大陆海岸线长度基本保持增长趋势;(2)自然岸线和河口岸线长度处于减少趋势,而人工岸线长度处于增加趋势,其增长速度大于自然岸线和河口岸线减少速度之和;(3)我国海岸线的分形维数呈直线增长趋势,其变化趋势与海岸线长度变化一致。

The shoreline change is an important reach issue in marine science. We selected nine images 371 King nearly 22 years, and then extracted shoreline. By studying the change law of length and fractal dimension of Chinese coastline nearly 22 years ,we concluded the following conclusions ： （ 1 ） the length of China~ mainland coastline had basically growth trend; （2） the length of natural shoreline and estuarine shoreline are decreasing, but artificial shore- line length is increasing, whose growth rate is bigger than other~ reduce speed; （3） the fractal dimension of Chinese coastline is basically in a growth trend, whose change trend is consistent with the length of the coastline.