地理学报

地理学报 ›› 2012, Vol. 67 ›› Issue (1): 113-121.doi: 10.11821/xb201201012

• 遥感应用 • 上一篇    下一篇

基于复杂网络的官厅水库流域土地利用/覆被变化

武鹏飞, 宫辉力, 周德民   

  1. 城市环境过程与数字模拟国家重点实验室培育基地, 教育部三维信息获取与应用重点实验室, 首都师范大学资源环境与旅游学院, 北京 100048
  • 收稿日期:2011-01-22 修回日期:2011-05-10 出版日期:2012-01-20 发布日期:2012-01-20
  • 通讯作者: 宫辉力, 男, 教授, 博士生导师, 中国地理学会会员(S110001027M), 主要从事水文生态学研究。E-mail: gonghl@263.net
  • 基金资助:
    国际科技合作项目(2010DFA92400); 北京市自然科学基金项目(8082010; 8101002); 国家自然科学基金项目(41071112)

Land Use and Land Cover Change in Watershed of Guanting Reservoir Based on Complex Network

WU Pengfei, GONG Huili, ZHOU Demin   

  1. Base of the State Laboratory of Urban Environmental Processes and Digital Modeling, Key Laboratory of 3D Information Acquisition and Application, Ministry of Education, College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China
  • Received:2011-01-22 Revised:2011-05-10 Online:2012-01-20 Published:2012-01-20
  • Supported by:
    International Science and Technology Cooperation Project, No.2010DFA92400; Natural Science Foundation of Beijing, No.8082010; No.8101002; National Natural Science Foundation of China, No.41071112

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摘要： 以北京西北部的官厅水库流域为研究区,以1978-2009 年之间的6 期Landsat 系列遥感影像为基础数据解译土地利用图。将土地利用/覆被变化(LUCC) 过程中的转移矩阵作为一种网络进行分析,土地利用类型是网络中的节点,不同地类之间的相互转化是网络的连线(边)。应用度、介数、网络平均最短路径等复杂网络方法,从土地利用系统整体的角度识别LUCC过程中的关键变化地类,评价土地利用系统的稳定性,分析生态环境变迁。研究结果表明：① 在近30 年的时间尺度上,旱地、天然草地和人工水域始终是转移矩阵中3 种关键变化地类,LUCC主要围绕这3 种地类进行;② 5 期转移矩阵网络的平均最短路径值均小于1.5,土地利用系统的活动性强、稳定性差,但五期网络的平均最短路径值总体上呈现增大趋势,土地利用系统向稳定方向发展;③ 近30 年来,自然生态系统不断被人工生态系统取代,自然生态系统中的天然草地面积减少了62.1%,未利用地的面积减少了65.1%。

关键词: 土地利用/覆被, 复杂网络, 关键变化地类, 官厅水库

Abstract: Based on six Landsat images from 1978 to 2009 of Guanting Reservoir located in northwest Beijing, this paper interprets land use maps. In the analysis of this paper, the transfer matrix of land use and cover change (LUCC) is studied as a network, among which land use types are nodes and conversions between different land use types are connections. From the overall perspective of land use system, the complex network methods of degree, betweenness and average shortest path are applied to identify the major changes in land use types, to assess stability of land use system and to analyse the changes from natural ecosystem to artificial ecosystem. The findings are shown as follows. First, in the time scale of recent 30 years, dry farming lands, natural grasslands and artificial water bodies are always the major changing land use types in transfer matrixes and the LUCC process has been dominated by these three land use types. Second, the average shortest path values of five transition matrix networks are all less than 1.5, indicating that land use system becomes more active yet less stable but the average shortest path values of these five networks present an increasing trend, indicating a more stable development of land use system. Third, in recent 30 years, natural ecosystem has been gradually replaced by artificial ecosystem, manifesting a reduction of 62.1% in natural grassland areas and a 65.1% reduction in waste land areas.

Key words: land use and land cove, complex network, major land use types, Guanting Reservoir