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中国沙漠 ›› 1996, Vol. 16 ›› Issue (3): 222-227.

• 研究论文 • 上一篇    下一篇

坝上地区沙漠化过程对景观格局影响的研究

常学礼   

  1. 中国科学院兰州沙漠研究所, 兰州 730000
  • 收稿日期:1996-01-25 修回日期:1996-04-19 出版日期:1996-09-20 发布日期:1996-09-20
  • 基金资助:
    该项研究得到中国科学院留学归国人员择优支持基金和兰州沙漠所所长基金的资助

THE STUDY OF RELATIONSHIP BETWEEN THE PROCESS OF DESERTIFICATION AND THE LANDSCAPE PATTERN IN BASHANG REGION,HEBEI PROVINCE

Chang Xueli   

  1. Institude of Desert Research, Chinese Academy of Sciences, Lanzhou 73000
  • Received:1996-01-25 Revised:1996-04-19 Online:1996-09-20 Published:1996-09-20

摘要: 用分维数、修改分维数和景观间隙度指数等分析方法, 对坝上地区正兰旗南部70年代和80年代的沙漠化土地空间格局进行了分析。研究结果表明: 在70年代, 潜在沙漠化土地和强烈发展中沙漠化土地格局的聚集度分别为1.49和1.124, 随着沙漠化的发展到80年代, 上述两类型的格局趋向分散; 而正在发展中沙漠化土地和严重沙漠化土地的聚集度增高, 分别为1.437和1.048。在沙漠化的发展过程中, 整个景观的格局和格局多样性趋向复杂, D和Dm分别从1.279和1.591增加到1.285和1.599; 与此相反, 不同沙漠化土地斑块的格局和格局多样性却趋向简单, D和Dm分别由1.259和1.584减少到1.194和1.414。此外, 在沙漠化的发展过程中(从70年代到80年代), 景观格局和格局多样性的变化, 小于斑块格局及其格局多样性的变化。

关键词: 沙漠化, 格局, 分维数, 修改分维数, 景观间隙度

Abstract: Using fractal dimension, modified fractal dimension and lacunarity for analyzing and describing landscape pattern, patch patterns of desertification land have been studied when desertification develops. The landscape contagions of potential desertification land and severely developing desertification land decrease with desertification development, while the landscape contagions of developing desertification land and severe desertification land increase when desertification develops. The landscape pattern and its diversity trend to become complex in developing desertification, fractal dimension and modified fractal dimension reduce from 1.259and1.584 to 1.194 and 1.414, respectively. Landscape patterns and its diversity change less than patches.

Key words: Desertification, Pattern, Fractal dimension, Modified fractal dimension, Lacunarity