热带地理

热带地理 ›› 2018, Vol. 38 ›› Issue (5): 689-698.doi: 10.13284/j.cnki.rddl.003068

• 论文 • 上一篇    下一篇

广东省地级市建设用地扩展模式区域差异与驱动机制

邓瑞民1,2，李少英3，吴志峰3，匡耀求1,2，马世发4   

  1. （1．中国科学院 广州地球化学研究所，广州 510640；2．中国科学院大学，北京 100049； 3．广州大学 地理科学学院，广州 510006；4．广东省国土资源技术中心，广州 510075）
  • 出版日期:2018-09-05 发布日期:2018-09-05
  • 通讯作者: 李少英（1987―），女，广东汕头人，副教授，研究方向为遥感与地理信息系统应用、地理模拟，（E-mail）lsy_0130@163.com。
  • 作者简介:邓瑞民（1992―），男，山西大同人，研究生，研究方向为资源环境与区域可持续发展，（E-mail）drmbgmail@163.com。
  • 基金资助:

    国家自然科学基金项目（41401432）

Regional Difference and Driving Mechanism of Construction Land Expansion Types in Prefecture-level Cities of Guangdong Province

DENG Ruimin1,2，LI Shaoying3，WU Zhifeng3，KUANG Yaoqiu1,2，MA Shifa4   

  1. （1．Guangzhou Institute of Geochemistry，Chinese Academy of Sciences，Guangzhou 510640，China；2．University of Chinese Academy of Sciences，Beijing 100049，China；3．School of Geographical Sciences，Guangzhou University，Guangzhou 510006，China； 4．Land and Resources Information Center of Guangdong Province，Guangzhou 510075，China）
  • Online:2018-09-05 Published:2018-09-05

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摘要：

利用景观扩展指数对2009―2014年广东省21个地级市建设用地扩展模式进行定量识别，对比和分析处于不同发展阶段城市的扩展模式组合与差异，揭示省级城市扩展的空间分异规律，并采用逐步回归模型探究不同扩展模式的驱动机理。研究表明：1）2009―2014年广东省各地级市城市扩展以边缘式为主，飞地式和填充式为辅，飞地式和填充式扩展比例呈反比。2）填充式扩展数量占比高的城市集聚于珠江口区域，呈现“小三角”形状，飞地式扩展数量占比高的城市在珠江三角洲区域外形成“大三角”的形状。3）人口密度越低，建设用地越趋向于飞地式扩展。非建设用地比例和人口密度较高的城市边缘式扩展更加剧烈。土地城镇化率高的城市填充式扩展更显著。

关键词: 建设用地, 扩展模式, 景观扩展指数, 广东省

Abstract:

At present，most research about urban expansion patterns focus on the identification of urban expansion types and the analysis of the urban expansion process and laws in a single city. It is lack of the study about the comparative analysis of urban expansion types at cities with different stages of development. Based on the Landscape Expansion Index (LEI)，which obtains the information about the spatio-temporal dynamic changes of land patterns, In this paper, the newly added construction land expansion types are divided into three types: outlying, edge-expansion, and infilling, other extension types can be considered as combinations or variants of the three basic extension types. This study quantitatively identifies the expansion types of 21 prefecture-level cities in Guangdong Province from 2009 to 2014 by LEI, compares and analyzes the expansion types combinations and differences in cities at different stages of development，and reveals the spatial differentiation of cities on provincial scale. In addition, the stepwise regression model is used to explore the driving mechanism of different expansion types．The results are summarized as follows：1）The newly added construction land expansion types of 21 prefecture-level cities in Guangdong Province from 2009 to 2014 are mainly of edge-expansion type，followed by infilling type and outlying type, the ratio of three expansion types is: 68:18:14. It is clearly that the proportion of outlying type and infilling type was inversely proportional, the cities with a high expansion type ratio of the outlying, the proportion of the infilling type is lower; on the contrary, the city with a higher proportion of the infilling type has a lower expansion type ratio of the outlying. 2）There is an agglomeration effect in cities with a higher outlying and infilling type ratio of newly construction land. In addition to Shantou City, the city with a large proportion of infilling type are concentrated in the Pearl River estuary area，which showed a 'small triangle' shape，while the cities with high proportion of outlying type are distributed around cites with a high proportion of the infilling type, forming a ‘big triangle’ shape outside the Pearl River Delta region．And cities with a higher proportion of edge-expansion type have no obvious spatial distribution 3）Three land expansion types have different driving mechanisms. The population density is the main influencing factor of the outlying type, the lower the population density is，the more the new construction land will be in the form of outlying type．The edge-expansion type is affected by the proportion of non-construction land and population density, the city with higher proportion of non-construction land and higher population density has more new construction land with edge-expansion type. The infilling type is affected by land urbanization rate, the new construction land with infilling type is more likely to appear in cities with high urbanization rates.

Key words: construction land, land expansion type, Land Expansion Index, Guangdong Province