自然资源学报 ›› 2015, Vol. 30 ›› Issue (2): 235-247.doi: 10.11849/zrzyxb.2015.02.007

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近20 a 三峡库区农林地利用变化图谱特征分析

王金亮1, 邵景安1,2, 李阳兵1   

  1. 1. 重庆师范大学地理与旅游学院, 重庆400047;
    2. 重庆师范大学三峡库区山地生态与区域发展研究所, 重庆400047
  • 收稿日期:2013-09-10 修回日期:2014-05-22 出版日期:2015-02-20 发布日期:2015-02-10
  • 通讯作者: 邵景安(1976-),男,汉族,安徽亳州人,博士,研究员,主要研究领域为土地利用与生态过程。E-mail:shao_ja2003@sohu.com E-mail:shao_ja2003@sohu.com
  • 作者简介:王金亮(1988-),男,汉族,江西婺源人,硕士,主要从事土地利用与GIS应用研究。E-mail:wang20080528@126.com
  • 基金资助:

    “基于库周气象数据的三峡水库地表覆被变化气候效应的情景模拟”(重庆市科委自然科学基金计划重点项目2010JJ0069);“基于斑块谱的三峡库区社区水平森林景观退化的‘通道-阻隔'效应”(教育部科学技术研究重点项目210181);“三峡库区(重庆段) 退化森林景观恢复社区水平的案例研究”(重庆市科委自然科学基金2009BB7239)。

Geo-Spectrum Based Analysis of Crop and Forest Land Use Change in the Recent 20 Years in the Three Gorges Reservoir Area

WANG Jin-liang1, SHAO Jing-an1,2, LI Yang-bing1   

  1. 1. College of Geographical Science, Chongqing Normal University, Chongqing 400047, China;
    2. Institute of Mountainous Ecology and Regional Development in the Three Gorges Reservoir Area, Chongqing Normal University, Chongqing 400047, China
  • Received:2013-09-10 Revised:2014-05-22 Online:2015-02-20 Published:2015-02-10
  • About author:10.11849/zrzyxb.2015.02.007

摘要:

土地利用变化图谱单元能够把表示“空间单元特征的图”与表示“时间发展之起点与过程的谱”合为一体,并建立起空间—属性—过程一体化数据信息。论文以TM/ETM影像为空间数据源,构建三峡库区1990—2000 年和2000—2010 年两个阶段农林地利用变化信息图谱,以及融合1990、2000、2010 年这三个时期土地利用现状的变化模式图谱,以探讨库区近20 a 来的农林用地变化轨迹和特征规律。结果表明:① 1990—2000 年阶段的农林地利用变化图谱主要以农林地间及其和草地互换、建设用地占用农林地的图谱单元类型为主。空间差异上最为显著的是“耕地→建设用地(编码15)”、“草地→林地(编码32)”和“林地→草地(编码23)”,空间分离度较低。② 2000—2010 年阶段的农林地利用变化图谱单元分离度增大,农林地利用发生转换空间进一步扩张。最显著变化的是“耕地→林地(编码12)”和“耕地→建设用地(编码15)”图谱单元类型,其次是农林地转换为水域图谱类型(编码14 和24)的面积增大。③ 库区农林地利用变化模式以前期变化型和后期变化型为主,反复变化型和持续变化型发生概率较小,库区农林地利用的转换具有明显的时间阶段性特征。

关键词: 农林地, 分离度, 图谱特征, 三峡库区

Abstract:

The Geo-spectrum unit of land use change can unify "the map expressing the spatial cells" and "the spectrum expressing the starting point and the process of phenomena" , and can establish the integrated space-property-process information. Supported by 3S technology, this paper built Geo-spectrum information of crop and forest land use change in the Three Gorges Reservoir Area at two stages (1990-2000, 2000-2010) based on TM/ETM images and auxiliary image interpretation, and also built Geo-spectrum of crop and forest land use change model which combined land use information of three periods (1990, 2000, 2010). Then the change trajectories, characteristics and laws of crop and forest land use in the Three Gorges Reservoir Ar-ea are discussed. The results showed that: 1) The interchange among crop land, forest land, and grass land, the crop land and forest land occupied by building land were the main ways of cropforest land use conversion throughout the 1990-2000 phases in the Three Gorges Reservoir Area. The change of crop land to building land (code 15)" , "grassland to forest land (code 32)" and "forest land to grassland (code 23)" were the most marked types in spatial differences, and the spatial isolation of them were low. 2) The isolation of Geo-spectrum unit of crop and forest land use change increased during 2000-2010, and the spatial scale of Geo-spectrum unit of crop and forest land use change further enlarged during 2000-2010. The most marked types were the change of "crop land to forest land (code 12)" and "crop land to building land (code 15)" . The second marked types were that of crop and forest land use flooded by water body (code 14 and 24). The area of this type enlarged. 3) The change in earlier stage and later stage were the main ways of crop and forest land use change in the Three Gorges Reservoir Area, so the transformation of crop and forest land use have obvious characteristics of stages.

Key words: Geo-spectrum characteristics, spatial isolation, crop and forest land, the Three Gorges Reservoir Area

中图分类号: 

  • F301.24