[1]王克晓,周 蕊*.近25年重庆主城区不透水面变化与驱动力分析[J].山地学报,2023,(4):521-531.[doi:10.16089/j.cnki.1008-2786.000767 ]
　WANG Kexiao,ZHOU Rui*.Urban Impervious Surface Changes in Main Urban Areas of Chongqing, China and Associated Driving Forces for the Period of 1995—2020[J].Mountain Research,2023,(4):521-531.[doi:10.16089/j.cnki.1008-2786.000767 ]
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近25年重庆主城区不透水面变化与驱动力分析
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2023年第4期
页码:
521-531
栏目:
山地环境
出版日期:
2023-07-20

文章信息/Info

Title:
Urban Impervious Surface Changes in Main Urban Areas of Chongqing, China and Associated Driving Forces for the Period of 1995—2020
文章编号:
1008-2786-(2023)4-521-11
作者:
王克晓; 周 蕊*
(重庆市农业科学院 农业科技信息研究所, 重庆 401329)
Author(s):
WANG Kexiao; ZHOU Rui*
(Institute of Agricultural Science and Technology Information, Chongqing Academy of Agricultural Sciences, Chongqing 401329, China)
关键词:
不透水面;  时空特征;  驱动力;  重庆
Keywords:
impervious surface;  spatiotemporal characteristics;  driving force;  Chongqing
分类号:
P951
DOI:
10.16089/j.cnki.1008-2786.000767
文献标志码:
A
摘要:
城市不透水面反映城市建设用地的利用强度和承载功能变化。不同城市的不透水面时空演化特征和空间分异机制因地貌不同而有所差异。重庆主城区是典型的“山城”城区,以往相关研究多关注城市建设用地,缺乏对城市不透水面的深入研究。把握重庆主城区不透水面的扩展演化过程及驱动力机制有助于理解其城市化发展进程,指导城区发展规划。本研究选取重庆主城区1995—2020年不同时期的不透水面数据,基于扩展变化测度指标、象限分析、景观格局指标以及地理探测器等方法,研究了不透水面时空变化特点及其驱动力因素。结果表明:(1)重庆主城区不透水面扩展速度和扩展强度持续增加,1995—2020年面积从125.08 km2增加到670.70 km2,年均扩展速度21.82 km2·a-1,整体扩展强度指数达到17.45%; 2015年以后,其扩展速度和强度均有所减缓,扩展强度下降为5.26%。(2)重庆市主城区不透水面的扩展方向主要为向北和向西发展,具有明显扩展优势的主要为渝北区和沙坪坝区; 在1995—2000年、2000—2010年和2015—2020年三个时间段内,其扩展方式经历了内部填充—外向扩展—内部填充的转变,以东北和北向的扩展辐射范围最大为30 km,其次西部辐射范围达到25 km。(3)随着城市化进程发展,重庆主城区的不透水面斑块不断产生与融合,扩展过程仍处于不稳定状态,形状复杂度不断提升,斑块聚集度逐步上升。(4)主城区的不透水面主要分布在15°以下的缓坡区。主城区不透水面的空间分异是多因素共同作用的结果,人口密度、GDP等社会经济因素是重庆主城区不透水面分布分异的主要因素,高程、坡度等自然因素在一定程度上影响着城区不透水面的空间分异,但影响力相对较弱。本研究结果可为重庆主城区城市化建设和发展规划提供科学依据。
Abstract:
Urban impervious surface reflects the change in the utilization intensity and bearing function of urban construction land. Owing to distinct urban geomorphic features in different cities, urban impervious surfaces are characterized by distinct spatio-temporal evolution patterns and spatial differentiation. The main urban area in Chongqing, China has a typical mountainous landform, where the most scientific attentions were paid to urban construction land planning; however, there were lacked of in-depth investigation into the changes in urban impervious surface, which could provide a new insight into the specific way how a mountain city developed substantially. It is quite necessary by a case study to grasp the evolution process and dynamic mechanism of impervious surface expansion in the main urban area of Chongqing for urban layout and orientation. In this study, it collected impervious surface datasets from 1995 to 2020 for the main urban area of Chongqing; then it analyzed its spatiotemporal characteristics and relevant driving factors using extended change measurement index, quadrant analysis, landscape pattern index and GeoDetector. Results were obtained as listed here.(1)The expansion speed and intensity of the impervious area in the main urban area of Chongqing had continued to increase since 1995; the area from 125.08 km2 in 1995 increased to 670.70 km2 in 2020 with an average annual expansion rate of 21.82 km2·a-1; the overall expansion intensity index reached 17.45%. After 2015, the expansion speed and intensity slowed down, with decreasing expansion strength of 5.26%.(2)The expansion direction of the impervious surface showed a trend of development towards the north and west of Chongqing; comparably, Yubei District and Shapingba District had obvious expansion advantages. During 1995—2000, 2000—2010 and 2015—2020, the expansion mode went through a transformation from internal filling to external expansion, and then internal filling, with the maximum expansion radiation range of 30 km in the northeast and north directions, followed by a radiation range of 25 km in the west.(3)With the development of urbanization, impervious surface patches in the main urban area had undergone a continuous process of emerging and integrating, but the expansion process was still in an unstable state, with constantly increasing complexity of their shapes, as well as gradually increasing of patch aggregations.(4)The impervious surface of main urban area was mainly distributed on gently sloping areas of below 15°. The spatial differentiation of impervious surfaces was the combined result of multiple. Social and economic factors, such as population density and GDP, were main factors contributing to the spatial differentiation of impervious surfaces; whereas natural factors such as elevation and slope affected the spatial differentiation of impermeable surfaces weakly. This study helps to systematically grasp the spatiotemporal changes and driving mechanisms of the impervious surfaces, and further provide scientific basis for urbanization planning in Chongqing.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2022-12-19; 改回日期(Accepted date):2023- 06-29
基金项目(Foundation item): 重庆市技术创新与应用发展专项(cstc2021jscx-lyzxX0001)[Technology Innovation and Application Development Special of Chongqing(cstc2021jscx-lyzxX0001)]
作者简介(Biography): 王克晓(1986-),男,河南平顶山人,硕士,助理研究员,主要研究方向:资源环境遥感。[WANG Kexiao(1986-), male, born in Pingdingshan, Henan province, M.Sc., assistant professor of research, research on remote sensing of resources and environment] E-mail: 447215670@qq.com
*通讯作者(Corresponding author): 周蕊(1981-),女,硕士,研究员,主要研究方向:农业信息化。[ZHOU Rui(1981-), female, M.Sc., professor, specialized in agricultural informatization] E-mail: 12087836@qq.com
更新日期/Last Update: 2023-07-30