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安徽舒城县土地利用类型斑块分形特征

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运用分形理论,对舒城县土地利用类型图斑的周长、斑块边缘密度和斑决形状指数的标度-频度关系进行了定量分析,结果表明:平原区、岗丘区、山区土地利用类型图斑的数目分别为514、222、94,图斑数目逐渐减少,同时景观异质性和景观破碎度逐渐降低.平原区占据优势地位的斑块是耕地,其面积占到平原区斑块总面积80%以上.岗丘区耕地和林地斑块面积百分比分别为31%和61%,占据着优势地位.山区则是林地斑块,其面积百分比为87%.斑决边缘密度普遍较高,土地利用类型斑块边缘趋向复杂化;斑块形状指数大部分小于1.5,斑块形状总体处于比较简单的状态;土地利用类型图斑的周长、斑块边缘密度和斑块形状指数的标度-频度双对数关系显著,相关系数均超过0.9,呈高度负相关,其分形关系客观存在.
The Analysis on the Patch Fractal Figure of All Land Use Types in Shucheng County
The paper used fractal theory to do the quantitative analysis on the perimeter of patches of all land use types, patches' edge densities and the scale-frequency relation of patches' shape indexes. The result showed that from plain to hillock, and then mountains, the number of all land use types' patches gradually reduced, landscape heterogeneity and landscape fragmentation decreased; the dominant patch in plain was arable land, and in hillock was arable land and woodland, while in mountain areas the patch was woodland; patches' edge densities were generally high and the edge of all land use types' patches tended to be complicated; patches' shape indexes were commonly not high, and patches' shape was relatively simple; the scale - frequency's double logarithmic relationship of the perimeter of patches, patches' edge densities and patches' shape indexes relation were respectively evident. And the correlation coefficient were all more than 0. 9 and showed highly negative correlation , that is, the fractal relationship was objective. It accelerates the further research on the fractal dimension between the perimeter and area of all land use types' patches, and the complexity and stability of patches.

Shucheng Countyland usefractal theorythe scale-frequency of patches

黎原、吕成文、祝凤霞

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安徽师范大学国土资源与旅游学院,安徽芜湖241003

资源环境与地理信息工程安徽省工程研究中心,安徽芜湖241003

舒城县 土地利用 分形理论 斑块标度-频度

2012

安徽师范大学学报(自然科学版)
安徽师范大学

安徽师范大学学报(自然科学版)

CSTPCD北大核心
影响因子:0.435
ISSN:1001-2443
年,卷(期):2012.35(2)
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