Modelling the long-term suspended sedimentological effects on stormwater pond performance in an urban catchment
Modelling the long-term suspended sedimentological effects on stormwater pond performance in an urban catchment
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模拟城市流域雨水池性能的长期悬浮沉积效应
DOI：
10.1016/j.jhydrol.2019.02.002
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发表时间：
2019
影响因子：
6.4
通讯作者：
Ahilan S
中科院分区：
文献类型：
--
作者：
Ahilan S
长期悬沙动力对雨水塘性能的影响不容忽视，但在雨水塘设计和性能评价中往往被忽视。本文提供了系统的模拟定量的长期悬浮泥沙对雨水池性能的影响。综合水文和二维水文形态动力学建模和模拟进行了32年（1984-2015年），涵盖了3896次降雨事件，降雨量，持续时间和强度范围广泛。三个基于事件的假设降雨情景：非洪水条件（5年），下水道设计条件（30年），河流洪水条件（100年）降雨事件与1小时的持续时间，也模拟了传统的基于事件的方法和本研究中提出的新方法之间的比较。模拟结果表明，小洪水（<5年一遇）和中洪水（<30年一遇）的洪峰衰减和延迟更为明显。长期连续的模拟结果表明，池塘提供积极的年度陷阱效率从2%到69%的31 32年，提供长期的水质效益下游。然而，2012年的极端降雨事件将累积的沉积物作为冲击负荷冲刷到下游河流，导致-11%的负陷阱效率。空间平均沉积物沉积速率，模型预测，变化与平均值（SD）2（1.34）厘米/年的研究期间，这导致了24%的损失，池塘的体积超过32年。在研究期内，定期探讨了储存损失对池塘洪水衰减能力的影响。结果表明，减少池塘的洪水衰减能力是相对更明显的中等（30年一遇）和极端（100年一遇）的洪水事件比频繁的小洪水（5年一遇）事件。此外，还探讨了年输沙量随降雨量和降雨格局的变化。
The influence of long-term suspended sediment dynamics on stormwater pond performance should not be ignored, but is often neglected in pond design and performance evaluation. This paper provides systematic simulated quantification of long-term suspended sedimentological effects on stormwater pond performance. Integrated hydrological and two-dimensional hydro-morphodynamic modelling and simulations were carried over a 32-year period (1984–2015) covering 3896 rainfall events with a wide range of rainfall volumes, durations and intensities. Three event-based hypothetical rainfall scenarios: non-flood condition (5-year), sewer design condition (30-year), and river flood condition (100-year) rainfall events with 1-h duration, were also simulated for comparison between the traditional event-based approach and the novel approach presented in this study. Simulation results show that the flood peak attenuation and delay are more pronounced for small (<5-year) and medium (<30-year) flood events. The long-term continuous simulation results indicate that the pond provides positive annual trap efficiencies varying from 2% to 69% for 31 of 32 years, providing long-term water quality benefits downstream. However, an extreme rainfall event in year 2012 flush out the accumulated sedimentation as a shock load to the downstream river, leading to a negative trap efficiency of −11%. The spatially averaged sediment deposition rate, as predicted by the model, varies with a mean (SD) of 2 (1.34) cm/year over the study period, which resulted in a 24% loss in the pond’s volume over 32 years. The impact of the loss in storage on pond flood attenuation capacity are explored at regular time intervals over the study period. The results indicate that reduction in the pond’s flood attenuation capacity is relatively more pronounced for medium (30-year) and extreme (100-year) flood events than the frequent small flood (5-year) events. The variation in annual sediment loading with rainfall quantities and patterns are also explored.
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影响因子：
4.1
作者：
S. Ahilan;Mingfu Guan;A. Sleigh;Nigel G. Wright;Heejun Chang
通讯作者：
S. Ahilan;Mingfu Guan;A. Sleigh;Nigel G. Wright;Heejun Chang
机场除冰对河流的影响：以泰恩河畔纽卡斯尔的乌斯本为例。
影响因子：
8.9
作者：
D. Turnbull;J. Bevan
通讯作者：
J. Bevan
自然洪水风险管理及其在自然过程中的作用
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
T. Lavers;S. Charlesworth
通讯作者：
S. Charlesworth
DOI：
--
发表时间：
1993
期刊：
影响因子：
--
作者：
M. J. Hall;D. Hockin;J. Ellis
通讯作者：
J. Ellis
俄勒冈州约翰逊溪流域的悬浮沉积物特征，2007-10 水年
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
Adam J. Stonewall;Heather M. Bragg
通讯作者：
Heather M. Bragg