莆田市土地利用格局的地形梯度特征变化及尺度效应

发布时间：2018-11-14 08:11

【摘要】：以莆田市1995年、2005年和2015年3期遥感影像和高程数据(DEM)为数据源,借助RS和GIS技术,运用地形位指数、土地利用类型分布指数和景观格局指数,对莆田市1995—2015年间土地利用格局在地形梯度上的分布特征、变化历程及空间尺度效应进行了系统分析。结果表明:(1)林地主要分布在高地形位区域,建设用地与水体主要分布在低地形位区域,农用地与裸露地主要分布在低、中地形位区域。(2)1995—2015年间,建设用地与农用地的主要分布区域逐步向较高的地形位区域扩张;林地与水体的优势分布区段并未发生变化。(3)尺度效应研究表明香农多样性指数、香农均匀度指数和蔓延度指数等在不同地形位上均不具尺度效应;斑块密度、景观形状指数和面积加权分维指数在不同地形位上均随尺度增加而减小。
[Abstract]:Based on three issues of remote sensing images and elevation data (DEM) in Putian City in 1995, 2005 and 2015, and with the help of RS and GIS technology, topographic location index, land use type distribution index and landscape pattern index were used. The distribution characteristics, changing course and spatial scale effect of land use pattern in Putian City from 1995 to 2015 were analyzed systematically. The results are as follows: (1) the forest land is mainly distributed in the high topographic area, the construction land and the water body are mainly distributed in the low topographic area, the agricultural land and the bare land are mainly distributed in the low and middle topographic area. (2) from 1995 to 2015, the forest land and the water body are mainly distributed in the low topographic area. The main distribution areas of construction land and agricultural land gradually expand to the higher topographic area; (3) the study of scale effect showed that Shannon diversity index, Shannon evenness index and spread index had no scale effect on different topographic sites. Patch density, landscape shape index and area-weighted fractal dimension index all decreased with the increase of scale.
【作者单位】：福建农林大学园林学院;
【基金】：国家林业公益性行业科研专项“美丽城镇森林景观的构建技术研究与示范”(201404301)资助
【分类号】：F301.2

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