基于高架城市LUCC策略的居住区绿地固碳潜力研究

Research on Carbon Sequestration Potential of Residential Green Spaces Based on LUCC Strategies in Elevated Cities

摘要:

研究高架城市设计（Elevated Urban Design，EUD）作为一种应对土地利用和生态资源稀缺问题的创新解决方案，提高城市空间绿地碳储量和提升生态系统服务的价值（Ecosystem Service Value，ESV）。聚焦于 EUD 模式下的土地利用（Land Use and Cover Change，LUCC）及居住区绿地碳汇增量和 ESV 的耦合关系。以 15 min 生活圈作为研究尺度，采用碳排放因子法估算土地利用变化带来的绿地碳储量增量；根据生态经济学原理，分析生态系统服务价值潜力。研究结果表明：（1）以 15 min 生活圈为规划范围，EUD 模式下的居住区绿地增量为 24.4~59 hm² ，绿地覆盖率增量为 6.1%~14.75%。（2）EUD 模式下居住区绿地碳排量减少 6.68~16.16 t/hm² 。（3）居住区绿地与 ESV 存在正相关性，ESV 增加 58.73~141.83 万元。（4）EUD 模式以土地集约化置换利用方式促进城市生态系统目标导向下的发展完整性。

Abstract:

This study investigates elevated urban design (EUD) as an innovative solution to address the scarcity of land use and ecological resources, aiming to increase the carbon storage of urban green space and enhance ecosystem service value (ESV). The focus was placed on the coupling relationship between land use and cover change (LUCC), green space carbon sink increment in residential areas, and ESV under the EUD mode. Using the 15-minute living circle as the research scale, the carbon emission factor method was used to estimate the increment of green space carbon storage caused by LUCC. Based on the principles of ecological economics, the ESV potential was analyzed. The results showed that: (1) using the 15-minute living circle as the planning scope, the increment of residential green space under the EUD mode ranged from 24.4 hm2 to 59 hm2 , with an increase in green space coverage of 6.1%-14.75%. (2) Under the EUD mode, the carbon emissions from residential green spaces decreased by 6.68 t/hm2 -16.16 t/hm2 . (3) A positive correlation was observed between residential green spaces and ESV, with ESV increasing by 587 300-1 418 300 yuan. (4) The EUD mode promoted the integrity of development under the goal-oriented urban ecosystem through intensive land replacement and utilization.