摘要
监测和分析不透水面的动态变化不仅能了解城市化进程,而且对城市未来发展规划具有重要意义。该文基于Landsat TM、ETM+、OLI和HJ-1A、B数据,结合地表特征指数变化,分析1990-2020年粤港澳大湾区不透水面的时空扩展变化,并利用象限方位分析方法探索城市扩展模式,进而揭示社会经济因素和政策因素的影响。研究结果显示:1)粤港澳大湾区不透水面的扩展主要集中在1990-2010年,后10年扩展速度最快,对耕地面积的影响最大,其次为林地和湿地;2)近30年粤港澳大湾区不透水面扩展主要呈东—西向,重心沿东南—西南—西北方向迁移,区内城市不透水面扩展模式主要为跳跃式组团扩展和沿交通轴线带状扩展,对城市群的空间格局产生巨大影响,未来应加强粤港澳大湾区东西两翼的协同发展,增加城市的绿化设施建设,避免城市扩展带来的生态环境问题。
Impervious surface is one of the important indicators reflecting the degree of urbanization.Monitoring and analyzing the dynamic changes of the impervious surface can not only increase the understanding of the urbanization process of the Guangdong-Hong Kong-Macao Greater Bay Area,but also have important significance for the future urban development planning of the Greater Bay Area.Based on Landsat TM,ETM+,OLI,HJ-1A/B data and geographic information system(GIS)technology,the spatial-temporal patterns of the impervious surface of the Greater Bay Area from 1990 to 2020,were obtained by analyzing the spatial-temporal characteristics and index changes of surface characteristics.The quadrant azimuth analysis method was used to explore the urban expansion modes,and then the influences of socio-economic and policy factors were revealed.The research results showed as follows.1)The expansion of impervious surface in the Greater Bay Area was mainly concentrated in 1990-2010,with the fastest expansion in 2000-2010.2)The expansion of impervious surface in the Greater Bay Area had the greatest impact on the cultivated land area,followed by woodland and wetland.3)In the past 30 years,the expansion of impervious surface in the Greater Bay Area was mainly in an east-west direction,and the trajectory of the center of gravity was southeast-southwest-northwest.4)The impervious surface expansion modes of the cities in the Greater Bay Area mainly included leaping group expansion and belt expansion along the traffic axis.In the past 30 years,the urban impervious surface of the Greater Bay Area has expanded significantly,which has had a huge impact on the spatial pattern of the urban agglomeration.In the future urban development,the coordinated development of the east and west wings of the Greater Bay Area,and the construction of the city′s greening facilities should be strengthened to avoid ecological environmental problems caused by urban expansion.
作者
尹振南
周廷刚
李洪忠
谢舒蕾
任彦霓
YIN Zhen-nan;ZHOU Ting-gang;LI Hong-zhong;XIE Shu-lei;REN Yan-ni(School of Geography Sciences,Southwest University,Key Laboratory of the Three Gorges Reservoir Region′s Eco-environment,Ministry of Education,Chongqing 400715;Center for Geospatial Information,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China)
出处
《地理与地理信息科学》
CSCD
北大核心
2021年第2期106-113,共8页
Geography and Geo-Information Science
基金
国家自然科学基金项目(41771403)
国家重点研发计划项目(2016YFC0500201-07)
国务院三峡办三峡后续工作库区生态与生物多样性保护专项项目(500000201BB5200002)。
关键词
不透水面
土地利用
城市扩展
粤港澳大湾区
impervious surface
land-use
urban expansion
the Guangdong-Hong Kong-Macao Greater Bay Area
