摘要
城市扩展和城市土地不同地表覆盖组合对城市生态系统服务和人居环境质量产生重要的影响。基于历史地图、遥感图像和城市规划图等多源数据通过人工数字化解译、大数据运算和混合像元分解相结合的方法发展了城市地表覆盖/土地利用数据集,从而获取了天津城市1949~2018年不同时段城市扩展过程,实现了其内部结构城市不透水面和绿地空间像元组分的遥感制图,综合分析了1949年以来天津主城区城市阶段扩展速度、扩展强度及城市不透水面和绿地空间地表覆盖类型的时空变化特征,进而揭示了社会经济因素和政策因素对其影响。研究结果表明:天津主城区城市土地面积从1949年的49.15 km2增长到了2015年的663.39 km2。从时间变化来看,城市扩展经历了"加速-减速-加速-减速"4个阶段;城市扩展的方式呈现以主城区填充式、沿比邻交通干线的乡镇,呈现带状扩展规律;扩展伴随城市建成区内部绿地空间比率呈现增加的趋势,表明天津主城区城市生态绿化水平总体呈现提升的状况。
Urban land use/cover changes have an important impact on urban ecosystem services functions and the environmental quality of human settlements. This study mapped urban expansion process using the historical data,remote sensing images and urban planning maps,and acquired the urban impervious surface and green space fraction based on big data platform. We analyzed the process of Tianjin urban expansion rate,intensity and urban land cover change since 1949,and revealed the driving factors in the process of urban expansion with social economic and policy factors. The results showed that the built-up area increased from 49.15 km2 in 1949 to 663.39 km2 in 2015. The expansion has undergone four stages of "acceleration – deceleration – acceleration-deceleration";the urban expansion mode presents the filled with built-up area and along with the neighboring transportation trunk lines. The proportion of green space in the built-up area is increasing,indicating that the urban ecological greening in the main urban area of Tianjin has been improved.
作者
李智礼
匡文慧
张澍
Li Zhili;Kuang Wenhui;Zhang Shu(Key Laboratory of Land Surface Pattern And Simulation,Institute of Geographic Sciences And Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《遥感技术与应用》
CSCD
北大核心
2020年第3期527-536,共10页
Remote Sensing Technology and Application
基金
国家自然科学基金面上项目(41871343)
中国科学院战略性先导科技专项(A类)(XDA23100201)
关键词
城市扩展
城市土地利用/覆盖
不透水面
天津
遥感监测
Urban expansion
Land use/cover change
Impervious surface
Tianjin area
Remote sensing monitoring
