摘要
城市绿地在施工建设以及后续的管理养护工作中所产生的生态环境负面影响往往被人们忽视。本研究以天津市城市绿地为对象,通过实地调研收集数据,采用生命周期评价方法,分析比较了城市绿地乔木层、灌木层以及草本层在建设阶段和管养阶段各环节的生命周期环境影响。结果表明:在50年生命周期内,单位面积乔木层、灌木层和草本层的环境影响综合指数分别为5.51×10^(3)、8.75×10^(3)和1.60×10^(3)。城市绿地最主要环境影响类型是淡水毒性和土壤毒性,分别占总环境影响的73.12%和26.65%。病虫害防治为城市绿地环境影响的主要贡献环节,贡献率高达99.33%。与农林业相比,城市绿地的管养环境影响指数处于中高水平。因此,城市绿地所造成的生态环境负面影响不可忽视。研究结果可以为城市建设低碳生态型绿地以及科学化管养提供参考依据。
Urban green space is an important green infrastructure in cities, providing various ecological services. However, unlike natural green space, there will be a lot of energy and resource inputs during the construction and maintenance of urban green space, which will result in negative environmental impacts. These negative environmental impacts are often ignored. Based on field surveys, the negative environmental impact of urban green space in Tianjin was analyzed using life cycle assessment method. The results showed that during the 50-year life cycle, the environmental impact index of tree layer, shrub layer, and herb layer per unit area was 5.51×10^(3), 8.75×10^(3), and 1.60×10^(3) respectively. Freshwater toxicity and soil toxicity were the main environmental impact types of urban green space, accounting for 73.12% and 26.65% of the total, respectively. According to our calculation, pest control was the main contributing factor of environmental impacts of urban green space, accounting for 99.33%. Compared with agriculture and forestry, the environmental impact index of urban green space was relatively high. Therefore, the negative environmental impact of urban green space should be paid more attention. Our results can provide support for urban green space management in a more low-carbon and sustainable way.
作者
员浩帆
张颖
徐文斌
孟伟庆
冯剑丰
YUN Hao-fan;ZHANG Ying;XU Wen-bin;MENG Wei-qing;FENG Jian-feng(School of Geographic and Environmental Science,Tianjin Normal University,Tianjin 300387,China;Key Laboratory of Pollution Processes and Environmental Criteria,Ministry of Education,and Tianjin Key Laboratory of Environmental Remediation and Pollution Control,College of Environmental Science and Engineering,Nankai University,Tianjin 300071,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2023年第2期493-503,共11页
Chinese Journal of Ecology
基金
国家重点研发计划项目(2018YFC1406403)资助。
关键词
城市绿地
生命周期评价
环境影响
管理养护
urban green space
life cycle assessment
environmental impact
maintenance
