闽台土地利用/覆被人为影响指数的地统计分析

Geostatistical Analysis on Human Impact Indexes for Land Use/Cover in Fujian and Taiwan

以地统计为研究方法,以闽台2002年ASTER遥感影像解译结果为数据源,构建土地利用/覆被人为影响指数,分别计算其空间变异特征。结果表明:闽台土地利用/覆被人为影响指数具有方向性,5个一级地类和整个区域所有地类的椭圆长轴都大致呈北北东―南南西走向,分布方向与地形和海岸线较为一致。福建结构方差所占比例为88.92﹪,台湾为87.42﹪,空间相关性均较强,结构性因子都以地形等自然要素为主,在土地利用/覆被空间分布格局中起主导作用,但台湾的结构性因子所占比例小于福建。闽台土地利用/覆被空间变异特征的重要原因之一是闽台自然环境相似性和经济发展的时序递差性。

Based on the ASTER images of Fujian and Taiwan in 2002, the land use/cover human impact indexes and the spatial variability characteristics are calculated. The results show that the human impact indexes have directionalities, the long axes trends of standard deviational ellipse of five land use/cover types and all types take on approximately NNW-SSW, which is consistent with the topography and the coastline. The proportion of structural variance is 88.92 % in Fujian while the one is 87.42% in Taiwan. The landform is dominant in the spatial distribution pattern of LUCC. The proportion of structural variance in Taiwan is smaller than the one in Fujian. One of the important reasons leading to the spatial variability in Fujian and Taiwan is their geographical proximity and a different economic development phase that Taiwan is in the stage of after industrialization but Fujian is in the middle stage of industrialization.