地理学报 ›› 2009, Vol. 64 ›› Issue (5): 609-618.doi: 10.11821/xb200905010

• 地表环境 • 上一篇    下一篇

贵州土地石漠化类型时空演变过程及其评价

白晓永1,2,4, 王世杰2,3, 陈起伟5, 程安云2,4, 倪雪波2,4   

  1. 1. 中国科学院、水利部成都山地灾害与环境研究所,成都610041;
    2. 中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳550002;
    3. 中国科学院地球化学研究所贵州省科技厅普定喀斯特研究综合试验站,贵州安顺562100;
    4. 中国科学院研究生院,北京100049;
    5. 贵州教育学院,贵阳550003
  • 收稿日期:2008-08-20 修回日期:2008-12-28 出版日期:2009-05-25 发布日期:2009-05-25
  • 通讯作者: 王世杰(1966-),男,浙江温岭人,研究员,博士生导师,博士,主要从事岩溶生态环境研究。 E-mail: wangshijie@vip.skleg.cn
  • 作者简介:白晓永(1978-),男,河北石家庄人,在读博士生,研究方向:岩溶环境与土地利用。
  • 基金资助:

    国家重点基础研究发展计划项目(2006CB403200);中科院知识创新重要方向项目(KZCX2-YW-306);国家科 技支撑计划重大项目(2006BAC01A09,2008BAD98B07)资助

Spatio-temporal Evolution Process and Its Evaluation Method of Karst Rocky Desertification in Guizhou Province

BAI Xiaoyong1,2,4, WANG Shijie2,3, CHEN Qiwei5, CHENG Anyun2,4, NI Xuebo2,4   

  1. 1. Institute of Mountain Hazards and Environment,CAS,Chengdu 610041,China;
    2. State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,CAS,Guiyang 550002,China;
    3. Puding Comprehensive Karst Research and Experimental Station,Institute of Geochemistry,CAS and Science and Technology Department of Guizhou Province,Puding 562100,Guizhou,China;
    4. Graduate School of Chinese Academy of Sciences,Beijing 100049,China;
    5. Guizhou Education Institute,Guiyang 550003,China
  • Received:2008-08-20 Revised:2008-12-28 Online:2009-05-25 Published:2009-05-25
  • Supported by:

    Basic Research Program of China, No.2006CB403200;Knowledge Innovation Program of the Chinese Academy of Sciences,No.KZCX2-YW-306; National Key Technology R&D Program,No.2006BAC01A09 and 2008BAD98B07

摘要:

构建了贵州20 世纪80 年代、90 年代和21 世纪初等3 期历史石漠化数据, 利用其空 间变换和数学模型详细探讨和评价了石漠化的时空演变过程, 研究发现: (1) 研究时段内贵州 省石漠化总面积变化不明显, 但石漠化内部类型之间的相互演变非常显著, 各类型之间的演 变具有转移、多变、“此消彼长” 的特点。(2) 石漠化的时空演变过程可分为单变方式、层变 方式、返变方式等3 种基本类型, 其中以层变方式为主, 单变方式为辅, 返变方式较少。(3) 石漠化正向演变与逆向演变并存, 治理速度赶不上恶化速度, 两者的比值为82.29%, 局部治 理, 整体恶化。(4) 各石漠化类型总的演变速率是398.31 km2·a-1, 石漠化等级越高, 演变速 率越慢。(5) 石漠化演变频率最快的是中度石漠化和潜在石漠化, 轻度石漠化的演变频率明显 低于中度石漠化。对石漠化的空间演变区域特征和影响因子做了宏观的定性分析、并根据石 漠化演变特点对综合治理提出了相应的建议。

关键词: 石漠化, 时空演变,

Abstract:

In this paper the spatial-temporal evolution processes of KRD land in Guizhou Province was analyzed mathematically by using 1:100000 scale digital-distribution maps of KRD land obtained by user-computer interactive interpreting method from Landsat images in 1986, 1995 and 2000. The following conclusions are obtained: (1) From 1986 to 2000, the change in total area of KRD land in Guizhou was not obvious, but the mutual transformation of different KRD types is extremely remarkable. (2) The change patterns of KRD land are divided into three kinds: simple change mode, continuous change mode and returned change mode, and characterized by continuous change mode. (3) The forward and reversion evolution processes coexist, with the ratio of the former to the latter being 82.29%, demonstrating that the situation is getting better partially and on the whole it is worsening. (4) The rate of the KRD evolution is 398.31 km2 per year, and the change rate of different type KRD land is inverse proportion to its degree of degradation. (5) The change frequencies of moderate and potential KRD land is highest and obviously higher than that of light KRD land. The regional characteristics of KRD spatial evolution and its influencing factors are analyzed, and some suggestions on comprehensive control of KRD land are put forward.

Key words: karst rocky desertification, spatial-temporal evolution, Guizho