摘要
营造城市屋顶绿化逐渐成为增加城市绿化面积、改善城区生态环境的新途径,但绿化屋顶的生态环境效益发挥受到诸多因素影响。如何定量分析绿色屋顶固碳潜力的影响因素,以使其固碳释氧的生态效益最大化,是当前屋顶绿化建设亟待解决的科学问题之一。该文基于文献综述探讨了植被种植层、土壤基质层、建筑类型和气候条件等因素对绿色屋顶固碳效应的影响。分析发现,绿色屋顶既能通过植物固碳、土壤固碳实现碳封存,还可以通过提高建筑的保温隔热性能减少建筑能耗和对化石燃料的需求,从而降低碳排放量。但是,绿色屋顶还涉及与其有关的原材料生产及运输、建造及拆除、运行阶段产生的隐含碳排放。因此,应进一步完善绿色屋顶固碳潜力的全生命周期分析方法,探寻固碳量的核算模型,对绿色屋顶全生命周期的环境效益进行定量研究,为绿色屋顶的推广应用提供分析评价的参考依据。
The construction of urban rooftop greening is a new approach with growing prevalence to increasing urban green space and improving the ecological environment of urban areas.However,the ecological and environmental benefits of green roofs are influenced by various factors.How to quantitatively analyze the factors influencing the carbon sequestration potential of green roofs,so as to maximize the ecological benefits of oxygen release by carbon sequestration,is one of the scientific problems demanding prompt solution in the roof greening construction currently.Based on a literature review,this paper explored the effects of such influencing factors like the vegetation planting layer,the soil substrate layer,building types,and climatic conditions on the carbon sequestration effectiveness of green roofs.The analysis revealed that green roofs can obtain carbon storage through plant and soil carbon sequestration,while lowering carbon emissions by improving the building's performance in thermal insulation to reduce its energy consumption and demand for fossil fuels.However,green roofs are also associated with embodied carbon emissions related to the production and transportation of materials,construction and demolition,and in the operational stage.Therefore,there is a need to further refine the full life cycle analysis methods for assessing the carbon sequestration potential of green roofs,develop accounting models for carbon sequestration levels,and conduct quantitative studies on the overall environmental benefits throughout the full life cycle of green roofs.This paper provides a basis for the analysis and evaluation of the promotion and application of green roofs.
作者
郝留昌
王志勇
Hao Liuchang;Wang Zhiyong
出处
《重庆建筑》
2024年第3期22-26,共5页
Chongqing Architecture
基金
湖南省自然科学基金资助项目(2021JJ50007)。
关键词
绿色屋顶
固碳
全生命周期
环境效益
green roof
carbon sequestration
full life cycle
environmental benefits
