为经济和水文评估低影响性开发实践,朝着最合适的绩效指标迈进
Laura Solarte1, Sophie Duchesne1, Geneviève Pelletier2
1Institut national de la recherche scientifique, Centre Eau Terre Environnement, 490, rue de la Couronne, Québec (QC), G1K 9A9, Canada.
Journal of environmental management
|November 18, 2025
概括
低影响开发实践有效地减少了综合下水道溢流 (CSO). 一种新的方法指导选择具有成本效益的场景,建议采用多标准方法,而不仅仅依赖于城市排水优化的效益成本比率.
科学领域:
- 环境工程 环境工程
- 城市水资源管理
- 可持续的基础设施可持续的基础设施
背景情况:
- 综合下水道溢出 (CSO) 在城市地区带来了重大环境挑战.
- 雨园和生物保留系统等低影响发展 (LID) 实践为民间社会组织缓解提供了可持续的解决方案.
- 评估LID实施的成本效益,以减少CSO,需要强大的经济指标.
研究的目的:
- 开发和介绍一种方法来选择最佳的LID实施场景,以减少CSO的频率.
- 将各种经济指标进行比较,以评估不同LID战略的成本效益.
- 为决策者提供一个框架,以便在城市排水系统管理方面做出明智的选择.
主要方法:
- 绩效指标的比较分析,包括净当前价值,效益成本比,成本效益和每次流量减少的效益.
- 将开发的方法应用于加拿大北克的两个案例研究,使用连续降雨数据.
- 评估不同的LID实施场景,重点关注生物保留系统和雨水花园.
主要成果:
- 生物保留系统显示高CSO频率降低 (83-100%在拉瓦尔,43-58%在蒙特利尔).
- 雨园的效益与成本比较高 (拉瓦尔高达3.43,蒙特利尔高达1.84).
- 在45%的实施率下,实现了显著的净现值 (4.47M CAD在拉瓦尔,80.1M CAD在蒙特利尔).
结论:
- 综合水文性能和经济指标的多标准方法对于有效的LID选择至关重要.
- 仅仅依靠成本效益比率可能会误导,并忽略了关键的投资因素.
- 该研究为优化在城市排水网络中LID实施提供了一个框架,增强监管合规性和长期效益.
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