基于3S技术的三峡库区不同坡度带与坡向带的景观格局研究——以巫溪县为例

Research on the landscape pattern of slopes with different gradients and directions in the area of Three Gorges Area based on 3S—A case study from Wuxi County

在3S技术支持下,采用景观面积比、分维数、多样性指数、斑块密度等景观格局指数及土地利用/覆盖综合动态变化度,分析了三峡库区巫溪县不同坡度带及坡向带的景观格局现状及变化。结果表明,不同景观类型在同一坡度带及坡向带的景观格局状况不同,同一景观类型在不同坡度带及坡向带亦不同。坡度与坡向对巫溪县景观格局状况及变化存在重要影响,且该影响陡坡比缓坡变化强烈,阴坡比阳坡变化强烈。

Supported by GIS, the actuality and changes of landscape patterns of slopes with different grades and directions in Wuxi County, which is located in Three Gorges Area, were analyzed by using landscape pattern indexes including the proportion of area to the landscape, fractal dimension of patches, landscape diversity index, patch density, and by using the indexes of land use dynamic. It is concluded that the landscape patterns of various landscape types are different in the slopes with the same gradient and direction. The same landscape pattern changes with the variations of slope gradient and direction. Slope gradient and slope direction have important impacts on the actuality and changes of landscape pattern in Wuxi County. The impacts of the steep slope are more intense than that of the slow slope, and shining slope is more intense than shading slope.