Comparing Green and Grey Infrastructure Using Life Cycle Cost and Environmental Impact: A Rain Garden Case Study in Cincinnati, OH
Comparing Green and Grey Infrastructure Using Life Cycle Cost and Environmental Impact: A Rain Garden Case Study in Cincinnati, OH
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DOI：
10.1111/1752-1688.12320
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发表时间：
2015-10
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影响因子：
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通讯作者：
Donald L. Vineyard;W. Ingwersen;Troy R. Hawkins;Xiaobo Xue;B. Demeke;W. Shuster
中科院分区：
文献类型：
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作者：
Donald L. Vineyard;W. Ingwersen;Troy R. Hawkins;Xiaobo Xue;B. Demeke;W. Shuster
绿色基础设施（GI）作为传统的雨水管理方法的一种成本更低、更环保的替代方案，正迅速获得认可。一种流行的GI形式是使用雨水花园来收集和处理雨水。我们使用生命周期评估（LCA）来比较在俄亥俄州辛辛那提牧羊人溪流域建造的住宅雨水花园与典型的拘留和处理系统对环境的影响。生命周期分析是一个国际标准化框架，用于分析产品或服务的潜在环境绩效，包括其生命周期的所有阶段，包括材料的提取、制造、使用和处置。作为生命周期环境影响评价的补充，采用了生命周期成本计算方法来比较每个系统的等效年成本。这些分析是通过建模替代方案来补充的，以捕获实现GI策略的可变性。我们的LCA模型表明，雨园的成本和影响是由劳动力需求决定的；传统替代方案的影响主要取决于废水处理的效率，而成本则取决于隧道建设的费用。研究发现，无论是在经济上（降低约42%的成本）还是在环境上（降低62% - 98%的影响），花园都是一个有利的选择。污水处理设施在实施雨水花园计划时可能会发现显著的生命周期成本和环境影响减少。
Green infrastructure (GI) is quickly gaining ground as a less costly, greener alternative to traditional methods of stormwater management. One popular form of GI is the use of rain gardens to capture and treat stormwater. We used life cycle assessment (LCA) to compare environmental impacts of residential rain gardens constructed in the Shepherd's Creek watershed of Cincinnati, Ohio to those from a typical detain and treat system. LCA is an internationally standardized framework for analyzing the potential environmental performance of a product or service by including all stages in its life cycle, including material extraction, manufacturing, use, and disposal. Complementary to the life cycle environmental impact assessment, the life cycle costing approach was adopted to compare the equivalent annual costs of each of these systems. These analyses were supplemented by modeling alternative scenarios to capture the variability in implementing a GI strategy. Our LCA models suggest rain garden costs and impacts are determined by labor requirement; the traditional alternative's impacts are determined largely by the efficiency of wastewater treatment, while costs are determined by the expense of tunnel construction. Gardens were found to be the favorable option, both financially (~42% cost reduction) and environmentally (62‐98% impact reduction). Wastewater utilities may find significant life cycle cost and environmental impact reductions in implementing a rain garden plan.