Understanding the synergistic effect between LID facility and drainage network: With a comprehensive perspective.
Understanding the synergistic effect between LID facility and drainage network: With a comprehensive perspective.
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DOI：
10.1016/j.jenvman.2019.06.028
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发表时间：
2019-09
影响因子：
8.7
通讯作者：
S. Zeng;Hao Guo;Xin Dong
中科院分区：
文献类型：
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作者：
S. Zeng;Hao Guo;Xin Dong
近年来，低影响发展（LID）被认为是改善雨水管理的有效策略。在大量关于LID设施改善城市排水系统（UDS）性能有效性的文献中，对LID的规模、位置、种类和参数进行了充分的讨论，而对城市排水网络的作用却很少考虑。由于盖子和排水网络共同实现UDS的功能，因此本研究旨在探讨它们对UDS的社会、环境和技术性能的协同效应。为了体现不同的协同效应，我们将中国昆明的案例区域划分为上游、中游和下游三个部分。不同路段的排水网络的水力和拓扑特征各不相同，设计了4个LID选址策略，将LID设施均匀地分布在3个路段之一或整个集水区。还讨论了降雨强度和LID分布的不确定性。基于建模结果，证实了协同效应的存在。由于盖子与排水网络的空间关系不同，导致UDS的性能差异较大。协同效应可能表现为UDS的各种功能之间的冲突的加剧或缓解，例如减少城市洪水、合流污水溢出、污水处理厂的冲击负荷等。协同效应对降雨强度敏感，表明在非设计条件下进行系统性能研究的必要性。由于协同效应复杂，在目标区域均匀分布lid是一种无怨无悔的简化方案。这些发现揭示了协同效应的重要性及其对LID规划的影响。
In recent years, low impact development (LID) has been deemed as an effective strategy for better storm water management. Among tremendous literature concerning the effectiveness of LID facilities to improve urban drainage system (UDS) performance, the scale, location, variety, and parameters of LIDs are fully discussed while the role of urban drainage network is rarely considered. Since LIDs and drainage network work together to realize the function of UDS, this research aims to explore their synergistic effects on the social, environmental, and technological performance of UDS. To represent different synergistic effects, a case area in Kunming, China is divided into upstream, midstream, and downstream sections. The hydraulic and topological characteristics of the drainage network in different sections are varied and 4 LID siting strategies are designed to distribute LID facilities in one of the 3 sections or in the total catchment evenly. Uncertainties from rainfall intensity and LID distribution are discussed as well. Based on the modeling results, the existence of synergistic effect is confirmed. Different spatial relationships between LIDs and the drainage network lead to disparate UDS performance. The synergistic effect may appear as the aggravation or mitigation of the conflicts among various functions of UDS, such as the reduction of urban flooding, combined sewer overflow, and shock loadings to wastewater treatment plant. The synergistic effect is sensitive to the rainfall intensity, suggesting the necessity of system performance investigation under non-design conditions. Due to the complicated synergistic effect, even distribution of LIDs in the target area can be a regretless and simplified solution. The discoveries reveal the significance of the synergistic effect and its implications for the LID planning.