地理学报

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基于主体功能区划的广州市土地资源安全评价

郑荣宝1, 3,  刘毅华2,  董玉祥3,  朱高儒3   

  1. 1. 广东工业大学经济管理学院,广州510520;
    2. 广州大学地理科学学院,广州510405;
    3. 中山大学地理科学与规划学院/土地研究中心,广州510275
  • 收稿日期:2008-12-11 修回日期:2009-02-22 出版日期:2009-06-25 发布日期:2010-04-15
  • 通讯作者: 刘毅华, E-mail: liuyihua96@sohu.com
  • 作者简介:郑荣宝 (1975-), 男, 福建永定人, 博士, 主要研究方向为土地资源开发利用与保护。 E-mail: zhengrongbao@163.com
  • 基金资助:

    国家自然科学基金项目 (40771003); 教育部科学技术研究重点项目(108171) 资助

Appraisal of Land Resources Security in Guangzhou Based on Major Function Regionalization

ZHENG Rongbao1,  LIU Yihua2,  DONG Yuxiang3,  ZHU Gaoru3   

  1. 1. College of Economics and Management, Guangdong University of Technology, Guangzhou 510520, China;
    2. School of Geography Sciences, Guangzhou University, Guangzhou 510405, China;
    3. School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2008-12-11 Revised:2009-02-22 Online:2009-06-25 Published:2010-04-15
  • Supported by:

    National Natural Science Foundation of China, No.40771003; Key Project of Science and Technology of the Ministry of Education of China, No.108171

摘要:

以科学发展观为依据,采用三维魔方图分类法对广州市进行主体功能区划,划分为禁止开发区、限制开发区、重点开发区、优化开发区和土地储备区。在此基础上以30m×30m的栅格作为最小的评价单元,从土地资源数量安全、质量安全、经济安全和生态安全四方面构建土地资源安全评价指标体系,并利用改进的支持向量机模型 (SVM) 进行评价与分类。结果表明:① 广州市主体功能区划具有明显的方向性,其中禁止开发区占总面积的37.21%,限制开发区占24.90%,重点开发区占19.60%,优化开发区占13.31%,土地储备区占4.98%;② 土地资源安全分值介于16~82之间,不同行政区土地资源安全状况具有明显差异,土地安全分较高的主要有南沙区和花都区,而荔湾区土地安全分最低;③ 广州市土地资源安全形势不容乐观,危险区和较不安全区占评价面积的比例达32.35%,主要分布在增城市和从化市的偏远山区以及市中心的荔湾区及越秀区,单位建设用地GDP、人均居住面积和归一化植被指数是其主要警源因素。

关键词: 主体功能区, 土地安全, 支持向量机, 广州

Abstract:

Based on the theory of scientific concept of development, the space of Guangzhou is divided into the optimized development zone, the emphasized development zone, the limited development zone, the forbidden development zone, and the land reserved zone. After that, this paper constructs the security evaluation indexes from four aspects consisting of land quantity security, quality security, economic security and ecological security. The values of land security in Guangzhou were calculated through model of support vector machines by a grid of 30 m ×30 m as the smallest appraisal units. The main conclusions are drawn as follows: (1) The forbidden development zone is 2766.00 km2, accounting for 37.21% of the city's total area. The land permitted to develop is 1851.07 km2, or 24.90% of the city's total; the emphasized development zone 1457.09 km2, or 19.60%; the optimized development zone is 992.46 km2, or 13.35%; and reserved zone area is 370.61 km2, or 4.99%. (2) Five types of safety grades are identified, with the value ranging from 16 to 86, but different districts are in different safe ranks. The best safe condition is Nansha district and the worst is Liwan district. (3) The result shows that the situation of land security in Guangzhou can not be optimistic. The percentages of dangerous and unsafe areas add up to 32.35%, which are mainly concentrated in remote mountainous suburbs and center of the city. GDP of the per unit construction area, the per capita living space and NDVI are the main factors affecting land resources security in Guangzhou.

Key words: major function regionalization, land security, support vector machine, Guangzhou