地铁项目引起的土地利用及碳汇时空变化评估——以成都地铁10号线二期项目为例  

Evaluation of Spatial-Temporal Changes of Land Use and Carbon Sinks Caused by Subway Projects:The Case of Chengdu Metro Line 10 PhaseⅡProject

作　　者：陈春宇 刘金[1] 毕凌岚[2,3] CHEN Chunyu;LIU Jin;BI Linglan(Southwest Jiaotong University;School of Architecture,Southwest Jiaotong University)

机构地区：[1]西南交通大学 [2]重庆大学 [3]西南交通大学建筑学院

出　　处：《世界建筑》2024年第7期50-55,共6页World Architecture

基　　金：国家自然科学基金项目批准号:52278079。

摘　　要：城市地下空间是城市化进程中的重要组成部分,在低碳城市建设中发挥着重要作用,地铁系统是解决城市交通拥堵和空气质量问题最受关注的交通基础设施。重大基础设施项目会引起土地利用变化,可能导致城市树木覆盖面积大幅减少,从而影响城市的陆地固碳潜力。调查了2016-2019年成都市地铁10号线二期项目导致的土地利用及陆地碳汇的时空变化。高分辨率遥感影像与POI数据相结合用于分析土地利用变化,利用landsat8 OLI卫星传感器数据估算的归一化差异植被指数用于检测树木覆盖变化和量化碳储量。结果表明,商业用地、一类居住用地以及交通设施用地增长较为剧烈,三类居住用地、物流仓储用地和其他用地逐年减少。在研究期间,地铁周边区域为修建地铁导致土地利用变化和砍伐城市树木造成了7.113tCO_(2)e的排放。以往在评估由于公共交通减少的排放量时,常忽略了这一部分。了解地铁站点对土地利用的影响以及地铁项目建设过程对碳排放的影响,对调整和优化地铁项目方案及地铁系统的节能减排具有重要的指导作用。Urban underground space is an important part in the process of urbanisation and plays an important role in the construction of low-carbon cities.Subway system is one of the most concerned urban transportation infrastructures to solve urban traffic congestion and air quality problems.Major infrastructure projects may lead to a significant reduction in urban tree coverage,thus affecting the land carbon sequestration potential of the city.This study investigated the temporal and spatial changes of land carbon sequestration caused by the Phase II project of Chengdu Metro Line 10 from 2016 to 2019.The normalised difference vegetation index estimated from landsat8 oli satellite sensor data is used to detect tree cover change and quantify carbon storage.The results show that the land for commercial use,first-class residential use and transportation facilities increase sharply,while the land for third-class residential use,logistics and storage use and other land use decrease year by year.During the study period,the cutting down of urban trees for the construction of subway within 1,000 m from the subway track centre line caused 7.113 tons of carbon dioxide emissions.This emission is ignored when estimating the emission reduction due to the promotion of public transport.The study of the impact of subway stations on land use and the impact of subway project construction process on carbon emissions has an important guiding role in adjusting and optimising the subway project plan and energy conservation and emission reduction of the subway system.

关 键 词：地铁项目 碳固存 遥感 归一化植被指数 土地利用变化 

分 类 号：F301.2[经济管理—产业经济] F572.88[环境科学与工程—环境工程] X322