基于全生命周期的兰州微公园碳平衡探究

Study on the Life-cycle-based Carbon Balance for Lanzhou Micro-park

微型公园绿地作为一种城市绿色空间对于达成“碳中和”目标具有重要价值。近年来,兰州城关区先后建成了一批微公园并投入使用,提供给市民休闲游憩、娱乐等服务。但建造时产生的碳排能否快速被自生所消纳尚不明确,据此展开了微公园全生命周期的碳平衡计算。结果表明:鱼池口微公园需要40.8 a实现碳平衡,东岗西路微公园则需要5.4 a实现碳平衡。说明兰州微公园在建设过程中大量消耗能量,导致了碳排放量高、生态效益低等问题。基于计算的结果进行对比分析发现影响其碳平衡的主要因素有运输距离、绿地率、景观材料的选择和施工工艺复杂程度等。据此,进一步对建造内容及过程提出优化策略。

As a kind of urban green space,micro parks are of great value in achieving the goal of "carbon neutrality".In recent years,a number of micro parks have been built and opened in the Chengguan District of Lanzhou,providing recreation and entertainment services to the public.However,it is unclear whether the carbon emissions generated during construction can be quickly absorbed by self-generation,so a life-cycle carbon balance calculation of the micro-park was made.The results show that it will take 40.8 years to achieve carbon balance for the Yuchikou Micro Park and 5.4 years to achieve carbon balance for the Donggang West Road Micro Park.This indicates that the micro parks consume a large amount of energy during the construction process,resulting in high carbon emissions and low ecological benefits.A comparative analysis based on the calculated results reveals that the main factors affecting its carbon balance are transportation distance,green space ratio,selection of landscape materials,and complexity of the construction process.Accordingly,further optimization strategies were proposed for the construction content and process.