城市建设用地时空演变特征及驱动分析——以重庆市两江新区为例

Analysis on the Characteristics and Driving Force of Spatial and Temporal Evolution of Urban Construction Land:Taking Chongqing Liang Jiang New Area as an Example

城市化是当前社会发展关注的重点问题,城市建设用地扩张是城市化的最主要形式之一,对典型区域城市建设用地进行研究,可为当地及类似区域城市规划和科学发展提供重要的数据支撑;以重庆市两江新区2010—2018年自然、社会、经济数据为依据,利用主成分分析方法,地理探测器等方法对两江新区城市建设用地时空变化进行分析,研究结果表明:两江新区城市建设用地扩张趋势呈先快后缓;扩展区域集中在“四山槽谷地带”和嘉陵江沿岸;城市建设用地扩张主要来源为耕地,以及少部分林地和园地;扩张的主要时间驱动因素为GDP值和第二产业占比,主要空间驱动因素为河流、坡度、距行政中心和距主要高速公路距离;城市建设用地扩张受多因素影响,在长时间序列下主要受经济因素影响,在空间上受自然因素影响大。

Urbanization is a key issue of current social development.The expansion of urban construction land is one of the most important forms of urbanization.Research on urban construction land in typical regions can provide important data support for urban planning and scientific development in local and similar regions.Based on the 2010-2018 natural,social,and economic data of Liangjiang New District,Chongqing City,using principal component analysis methods,geographic detectors and other methods to analyze the spatio-temporal changes of urban construction land in Liangjiang New Area,the research results show that Liangjiang New Area urban construction land expansion trend is rapid first and then slow;the expansion area is concentrated in the"four mountains and troughs"and along the Jialing River,the main source of urban construction land is cultivated land,and a small part of woodland and garden land;the main time driving factors for expansion are the GDP value and the proportion of the secondary industry,and the main spatial driving factors are rivers,slopes,distances from administrative centers and major highways.The expansion of urban construction land is affected by many factors.In the long-term series,it is mainly affected by economic factors,and spatially affected by natural factors.