地理研究 ›› 2011, Vol. 30 ›› Issue (4): 667-675.doi: 10.11821/yj2011040009

• 土地资源与利用 • 上一篇    下一篇

近30年来绵阳市城市用地扩展模式研究

董廷旭1,2, 秦其明2, 王建华1   

  1. 1. 绵阳师范学院资源环境工程学院,四川 绵阳 621000;
    2. 北京大学遥感与地理信息系统研究所,北京 100871
  • 收稿日期:2010-07-05 修回日期:2011-02-25 出版日期:2011-04-20 发布日期:2011-04-20
  • 通讯作者: 秦其明(1955-),男,教授,博导,主要从事RS与GIS领域的教学与研究工作。 E-mail:qmqinpku@163.com
  • 作者简介:董廷旭(1965-),男,副教授,主研究方向为3S技术应用与景观规划。E-mail:dong3s@163.com
  • 基金资助:

    国家高技术研究计划(863计划)资助项目(2007AA120205)

Expansion modes of urban land-use in Mianyang City in the last 30 years

DONG Ting-xu1,2, QIN Qi-ming2, WANG Jian-hua1   

  1. 1. School of Resource and Environmental Engineering, Mianyang Normal University, Mianyang 621000, Sichuan, China;
    2. Institute of Remote Sensing and Geographic Information System, Peking University, Beijing 100871, China
  • Received:2010-07-05 Revised:2011-02-25 Online:2011-04-20 Published:2011-04-20

摘要: 城市用地扩展不仅是评价城市化水平的重要测度指标,也是土地利用/覆被变化(LUCC)研究重要领域之一。本文以多时相、多源空间数据为基础,采用RS专题信息提取与GIS空间叠加分析技术,选择扩展强度指数、紧凑度、分形维数、重心转移指数、扩展方位指数等5个景观结构与变化指标,系统地分析了中国科技城绵阳城市用地扩展模式与时空分异特征。结果表明:1980~2009年间绵阳城市扩展总面积达110.11km2,年平均扩展速度为3.8km2,平均扩展强度指数为0.65,呈快速增长态势;其扩展方向的空间分异十分明显,呈一中心、多组团、三轴向、"Y"字型扩展模式,用地扩展处于粗放型向集约型过渡期。

关键词: 城市用地, 时空分异, 扩展模式, 绵阳市

Abstract: As one of the important research fields in the land use or in the LUCC, the expansion of the urban land use is one of the significant indexes to evaluate the urbanization level of a city. Based on the related multi-temporal and multi-source spatial data, this paper conducts a research on the expansion modes and spatial-temporal variations of the urban land use in Mianyang City, one of the science cities in Southwest China. It analyzes the expansion speed coefficient, the expansion intensity index, the compactness, the fractal dimension, the barycenter index, the extending orientation and direction index with the methods of the RS thematic information extraction and GIS spatial overlay analysis. The result shows that the land use in Mianyang City in the last 30 years has increased to 110.11 km2, or 3.8 km2 per year. The average expansion intensity is 0.65. The extending direction of space differentiation is obvious, which can be described as Y mode with a center and three axes. And the expansion mode indicates a transformation from extensive expansion to intensive expansion.

Key words: urban land-use, spatial-temporal variations, expansion mode, Mianyang City