摘要
生态价值为对生态系统服务功能的市场化估算,包括可市场化功能的价值和非可市场化功能的影子价值,即自然价值与经济价值。基于分辨率30m的LandsatTM数据,通过图像解译得到2009和2019年土地利用空间数据集(.adf和.xlsx格式),从不同土地利用方式产生不同服务价值的角度出发,研究了南京市六合区近10年来,特别是在国家级江北新区战略驱动下的城乡空间变化情况,并核算了城乡空间变化带来的生态价值损益。经测算南京市六合区建设空间拓展导致全区自然价值减少3.3%,全区整体处于弱可持续发展状态。综合考虑全区水域、林地、湿地、草地、耕地生态系统的生态价值,研究了城乡空间拓展"经济文明"逻辑下的"不经济"现象,结果表明上述五类生态系统与建设空间生态系统的价值比例由单纯计算经济价值的1∶5提升到1∶3,建设空间的综合效益不再突出,必须限制城乡空间外延式拓展对水域等五类生态系统的占用。
The ecological value refers to the valuation of ecosystem services, which includes the value of market functions(i.e., economic value) and the shadow value of non-market functions(i.e., natural value). Given that different land-use patterns result in varied service values, this study investigated recent urban and rural spatial changes in the Liuhe district of Nanjing, China, over a 10-year period, especially driven by the state-level new area strategy. Using Landsat TM data, spatial datasets of land use in 2009 and 2019 were obtained by image interpretation. Costanza’s natural value estimation method was applied to calculate the profits and losses of ecological value caused by land-use change. From 2009 to 2019, the expansion of construction space(residential/service land, industrial/mining land, and transportation/other land) led to a decrease of 3.3% in the natural value of the whole district. According to the strong sustainable development principle of "natural value cannot be reduced", the Liuhe district is deemed to be in a weak state of sustainable development. Considering the ecological value of non-construction space(water area, woodland, wetland, grassland, and cultivated land), the "uneconomical" phenomenon was investigated under the logic of "economic civilization" in urban and rural spatial expansion. The ratio of ecological value between non-construction and construction spaces increased from 1∶5 to 1∶3, indicating that the comprehensive benefits of construction space are no longer prominent. Accordingly, it is necessary to limit the occupation of non-construction space such as water area by the extensive expansion of urban and rural construction land.
作者
王波
刘德燕
Wang,B.;Liu,D.Y.(Nanjing Academy of Urban Planning&Design Co.Ltd,Nanjing 210005,China;State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China)
出处
《全球变化数据学报(中英文)》
CSCD
2020年第2期170-180,170-180,共22页
Journal of Global Change Data & Discovery
基金
国家自然科学基金(41977049)
关键词
国家级新区
空间变化
生态价值损益
南京市六合区
state-level new area
land-use change
ecological profit and loss
Liuhe district
Nanjing city