中山市土地景观格局动态变化分析

An analysis of landscape pattern dynamic change in Zhongshan City

利用遥感影像和GIS技术,通过采用多样性、破碎度和分维数等指数,分析了中山市1988年和2006年两期土地景观格局的总体变化.结果表明:①各景观类型的斑块数量增加,面积变化较大,且斑块形状复杂性增加;②景观破碎度大小不一,景观类型稳定性各不同,优势度减少,受人类干扰程度加深;③景观斑块之间的转移中,耕地、基塘用地和未利用地不断转移为建设用地,耕地也有大部分转移到基塘用地,建设用地成为景观格局中的主要组成要素;④整体上看景观变化幅度稍大.

With remote sensing images and GIS technology,using the indices of diversity,fragmentation and fractal dimension,we analyzed the overall changes of land use and landscape patterns in Zhongshan City in two years of 1988 and 2006,respectively.The results showed that： ① patch number,area change and patch shape complexity of all landscape types increased;② landscape fragmentation degree and landscape type stability differed,but landscape dominant degree decreased,and disturbance degree from human being grew;③ in the conversion of landscape patches,cultivated land,dike-pond land and unutilized land were constantly displaced by construction land,meanwhile a large part of cultivated land was transferred into dike-pond land,and construction land was becoming the main component factor in the landscape pattern;④ on the whole,the scope of landscape change was rather great.