成都市城市蓝绿系统碳储量评估及优化策略研究

Assessment and Optimization Strategy of Urban Blue-Green System Carbon Stock in Chengdu

摘要:

温室气体大量排放加剧了全球变暖，严重威胁城市与居民的健康福祉。而城市蓝绿系统是适应与缓解气候变化，固碳增汇的重要手段之一。以成都市中心城区为例，基于土地利用数据，利用InVEST 碳储量模型与 ArcGIS 空间可视化分析工具，对城市蓝绿系统碳储量进行评估及分区，结果发现，研究区总碳储量空间分布呈现出“中心低，四周高”的特征，低碳区域集中分布在研究区域的中部且占比最大，碳汇潜力区沿环城生态带分布，高碳区域零星分布在研究区域东侧。据不同碳储量的划分区域提出具有针对性的碳储量优化策略：高碳区域应优先保护现有的蓝绿空间；碳汇潜力区可调整和恢复现有的蓝绿空间；低碳区域需改良和管理蓝绿空间。

Abstract:

The massive emission of greenhouse gases has led to an increasing trend of global warming, seriously threatening the health and well-being of cities and their inhabitants. The urban blue-green system is one of the important means to adapt to and mitigate climate change sequester carbon and increase sinks. In this paper, we take the central city of Chengdu as an example, based on the land use data, use the InVEST carbon stock model and ArcGIS spatial visualization and analysis tools to evaluate and partition the carbon stock in the urban blue-green system, and the results found that: the spatial distribution of the total carbon stock in the study area shows the characteristics of low in the center and high in the surroundings. The low Carbon Sequestration Area is concentrated in the middle of the study area and accounts for the largest proportion, the Potential Carbon Sequestration Area is distributed along the ecological belt around the city, and the High Carbon Sequestration Area is sporadically distributed in the east side of the study area. According to the different carbon storage areas, we propose targeted carbon storage optimization strategies: High Carbon Carbon Sequestration Areas should prioritize the protection of existing blue-green spaces; Potential Carbon Sequestration Areas can adjust and restore existing blue-green spaces; Low Carbon Carbon Sequestration Areas need to improve and manage blue-green spaces.