【摘要】 城市绿地的空间格局影响其向市民提供各种生态服务的能力,以广州市为研究区域,利用1993—2013年中的共11期TM影像数据和DMSP/OLS夜间灯光影像数据,结合ArcGIS、ENVI、FRASTSTS等软件,在不同条件下划定城区范围,对这20年内广州市的城市绿地空间格局进行动态分析。然后建立土地集约利用的指标体系,与绿地空间格局的衡量指标做灰色关联分析,以明确两个系统之间的关联性。景观格局指数结果表明:1993年—2013年,广州市的城市绿地覆盖率、平均斑块大小、平均面积加权的形状指数和聚集度总体下降,斑块密度、平均最临近距离总体上升,说明广州市城市绿地呈现覆盖度下降、破碎化和规则化的趋势,且程度高低和变化幅度与空间上到建成区距离显著相关。灰色关联分析结果显示:与绿地空间格局变化关联的指标中,地均房地产开发投资额和地均市政公用设施建设固定资产投资额最高,地均社会消费品零售总额次之,说明房地产开发、政府主导的市政设施建设是土地集约利用体系中关联程度最高的两项活动,商业服务业的发展也具有一定程度的影响。研究结果可为研究区域制定规划和相关政策提供依据。更多还原

【Abstract】 Spatial pattern of urban green space exerts direct influences on the provision of ecosystem services. In this article, we took Guangzhou City as a case study, and explored landscape changes of green spaces during the period of 1993-2013. The landscape pattern indices were calculated using Landsat TM images and DMSP/OLS night light images in the geographic information system software. The land use intensification of the city was evaluated based on a multiple criteria decision analysis,and then its relationship with the distribution of urban green spaces was analyzed using the grey correlation analysis approach.The results exhibited the decrease of PlAND, MPS, AWMSI and AI and the increase of PD and MNN from 1993 to 2013,indicating the trend of coverage decline, fragmentation and shape regularization of urban green spaces in Guangzhou. Moreover,the landscape change of urban green spaces was significantly correlated with the distance to the built-up areas. The grey correlation analysis revealed the real estate development investment per square kilometer and municipal public facilities constructions of fixed assets investment per square kilometer were the top 2 indexes among several indexes related to the changes of green space, and social consumable total retail sales per square kilometer was the secondary. Land use intensification of Guangzhou was highly correlated with real estate development and government-led municipal construction, and had a moderate correlation with the development of commerce and service industries. Our studies are expected to provide a support for urban planning and policy making in Guangzhou City.更多还原