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Watershed Planning within a Quantitative Scenario Analysis Framework
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空间经济场景,以提高城市抗洪能力
Maria Chiara Lippera1, Ganbaatar Khurelbaatar1, Daneish Despot1
1Department of Systemic Environmental Biotechnology, Helmholtz Centre for Environmental Research-UFZ, Permoserstrasse 15 04318 Leipzig, Germany.
Water research X
|December 24, 2024
概括
分散的以自然为基础的解决方案 (NBS) 可以减少城市洪水和节省成本. 然而,对于综合的下水道溢出管理,集中建造的湿地往往更经济.
科学领域:
- 环境工程 环境工程
- 城市规划 城市规划
- 适应气候变化 适应气候变化
背景情况:
- 由于气候变化和人口增长,城市排水系统需要适应.
- 针对城市洪水的分散的基于自然的解决方案 (NBS) 的经济效益正在调查中.
- 评估NBS在雨水管理方面的潜力和成本效益对于城市的弹性至关重要.
研究的目的:
- 使用NBS开发空间经济场景,以提高城市对洪水的抵御力.
- 通过使用自动化程序,评估现有城市水域内去中心化NBS的潜力.
- 评估去中心化NBS与集中化解决方案相比,用于联合下水道溢出 (CSO) 缓解的成本效益.
主要方法:
- 使用开放的地理空间数据评估分散的NBS潜力的自动化程序的开发.
- 创建一个基于区块的去中心化潜力指标,用于评估雨水减缓.
- 在Ecully流域 (法国里昂) 的案例研究,以实现特定设计风暴事件的零CSO.
- 空间经济场景开发,包括成本函数和扩展效应.
主要成果:
- 与较小,广泛分布的干预相比,分散的NBS规划可以在5年设计风暴中节省高达34%的项目成本,在100年设计风暴中节省高达7%.
- 自动化程序和去中心化潜力指标促进了NBS的识别和维度.
- 由于保留能力和扩展效应较高, CSO管理的集中建设湿地被发现是最经济的解决方案,优于灰色基础设施替代方案.
结论:
- 分散的NBS在城市洪水管理规划中提供了显著的成本节约.
- 虽然分散的NBS显示出希望,但集中建造的湿地为大规模的CSO控制提供了更经济的选择.
- 结合空间经济分析的综合规划方法对于优化城市雨水管理策略至关重要.
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