Impact Assessment of Stormwater Alternatives on Generated Runoff in Cities Experiencing Urban Decline
Impact Assessment of Stormwater Alternatives on Generated Runoff in Cities Experiencing Urban Decline
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DOI：
10.1016/j.proeng.2016.04.042
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
K. Faust;D. Abraham
中科院分区：
文献类型：
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作者：
K. Faust;D. Abraham
不断缩小的城市经历了大量的、长期的人口下降，导致不透水的、空置的或废弃的房产被淹没，这些房产导致径流进入雨水系统。这些城市有可能改变土地用途，有选择地将多余的土地过渡到透水表面，或实施绿色基础设施来现场处理雨水，减少进入雨水系统的径流和污染物。本研究评估了以下因素对产生的径流的影响：（1）停用不透水表面，（2）过渡土地使用，（3）在空置地块的社区水平上纳入生物滞留单元。水文水力模型被用来评估在两个中西部萎缩的城市，每个不同的雨水系统（组合和单独）使用城市提供的和公开可用的数据运行的替代品。对历史降水量、短持续时间、高强度风暴和长持续时间、低强度风暴进行了评估。实施替代方案可以减少10%至98%的径流量，具体取决于替代方案和降水/风暴。
Shrinking cities have experienced substantial, chronic population decline resulting in the inundation of impervious, vacant or abandoned properties that contribute to the runoff entering the stormwater systems. These cities have the potential to shift land uses, selectively transition excess land to pervious surfaces, or implement green infrastructure to treat stormwater onsite, reducing the runoff and pollutants entering the stormwater systems. This study evaluated the impact on the generated runoff due to: (1) decommissioning impervious surfaces, (2) transitioning land uses, and (3) incorporating bioretention cells at the neighborhood level in vacant lots. Hydrology-hydraulic modeling was used to evaluate the alternatives in two Midwestern shrinking cities, each operating on different stormwater systems (combined and separate) using city-provided and publicly available data. Historic precipitation; short-duration, high-intensity storms; and long-duration, low-intensity storms were assessed. Implementing the alternatives can reduce runoff between 10% and 98% depending upon the alternative and precipitation/storm.