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Optimal Sewer Network Design for Cities in Hilly Regions 丘陵地区城市污水管网优化设计
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-06-27 DOI: 10.1080/1573062X.2023.2229303
J. Saldarriaga, Juana Herrán, P. Iglesias-Rey
ABSTRACT This paper proposes a method to include drop manholes in the optimal design of sewer networks. These structures dissipate energy and reduce flow velocity, which is important in hilly regions where high slopes induce velocities that exceed the maximum allowable. The methodology proposed here introduces a new type of arc to represent drop manholes in a model that uses graph theory to achieve the minimum cost design of a sewer network. Also, for the estimation of drop manhole costs, a new cost function is developed based on pipe and manhole cost equations proposed in the literature. The methodology was tested in eight different series of pipe configurations, as well as a real sewer network located in Colombia, varying the pipe material and the land slope. The results demonstrated that the proposed methodology allows for the optimal design of sewer networks in hilly regions while satisfying all hydraulic and commercial constraints.
摘要:本文提出了一种在污水管网优化设计中加入滴落人孔的方法。这些结构耗散能量并降低流速,这在丘陵地区很重要,因为高坡会导致流速超过最大允许值。本文提出的方法引入了一种新型的圆弧来表示在一个模型中使用图论来实现下水道网络的最小成本设计。同时,在文献中提出的管道和人孔成本方程的基础上,提出了一种新的成本函数来估算跌落人孔成本。该方法在8个不同系列的管道配置中进行了测试,并在哥伦比亚的一个真实的下水道网络中进行了测试,测试中改变了管道材料和土地坡度。结果表明,所提出的方法允许在丘陵地区下水道网络的优化设计,同时满足所有水力和商业限制。
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引用次数: 0
Convergence and influencing factors of urban domestic water consumption in the Yangtze River Delta under urbanization 城市化条件下长三角城市生活用水量的收敛性及其影响因素
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-06-26 DOI: 10.1080/1573062X.2023.2229299
Dongying Sun, Yanxiao Wang, Mengxia Shi, Xuhui Ding
ABSTRACT This study employs panel data from 41 cities from 2010 to 2019 in the Yangtze River Delta. The entropy weight method is used to calculate the urbanization level. Then, the convergence, panel spatial econometric, and threshold regression models are adopted to examine the convergence and to identify the factors affecting water consumption. The following conclusions may be drawn: Spatial differences in the level of domestic water consumption show a trend of gradual reduction over time; there exists mutual influence of neighboring cities; urbanization positively affects domestic water consumption significantly; the spatial spillover effect of urbanization on domestic water consumption is significantly negative; the promotion effect of urbanization on domestic water consumption is nonlinear, and the promotion effect increases with the increase of the proportion of domestic water and the proportion of public service water. Then, targeted countermeasures are brought forward.
摘要本研究采用了2010年至2019年长三角41个城市的面板数据。采用熵权法计算城市化水平。然后,采用收敛性、面板空间计量经济学和阈值回归模型来检验收敛性,并确定影响用水量的因素。可以得出以下结论:生活用水量水平的空间差异随着时间的推移呈现逐渐减少的趋势;周边城市之间存在着相互影响;城市化对生活用水量有显著的正向影响;城市化对生活用水量的空间溢出效应显著为负;城镇化对生活用水量的促进作用是非线性的,且促进作用随着生活用水比例和公共服务用水比例的增加而增加。然后,提出了有针对性的对策。
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引用次数: 0
Exploring near-optimal locations for bioretention systems in catchment scale using many-objective evolutionary optimization 使用多目标进化优化在集水区范围内探索生物滞留系统的接近最佳位置
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-06-06 DOI: 10.1080/1573062X.2023.2211557
Abtin Shahrokh Hamedani, C. D. do Lago, M. Giacomoni
ABSTRACT Low impact developments (LIDs) are control measures to restore the hydrologic regime and enhance stormwater quality. Due to LID’s expensive capital and maintenance cost, the placement of LID controls in a watershed is an important planning task and still an open question in the specialized literature. This study proposes a simulation-optimization approach to place bioretention systems within a watershed to optimize their effectiveness. The Stormwater Management Model (SWMM) and the Non-dominated Sorting Genetic Algorithm III (NSGAIII) were coupled to identify the near-optimal locations of bioretentions for near-optimal quality and quantity controls, considering runoff volume, peak flow, total suspended solids, total nitrogen, and cost. Trade-offs were identified between cost versus other objective functions. The results suggest no specific spatial preference in placement of bioretentions under different rainfall regimes in watershed scale. However, in subcatchment scale, the near-optimal placement under single storm events is either maximum or none, while distributed under continuous simulation.
摘要低影响开发(LID)是恢复水文状况和提高雨水质量的控制措施。由于LID昂贵的资本和维护成本,在流域中放置LID控制是一项重要的规划任务,在专业文献中仍然是一个悬而未决的问题。本研究提出了一种模拟优化方法,将生物滞留系统放置在流域内,以优化其有效性。结合雨水管理模型(SWMM)和非支配排序遗传算法III(NSGAII),在考虑径流量、峰值流量、总悬浮固体、总氮和成本的情况下,确定生物滞留的接近最优位置,以实现接近最优的质量和数量控制。确定了成本与其他目标函数之间的权衡。研究结果表明,在流域尺度的不同降雨条件下,生物滞留区的布局没有特定的空间偏好。然而,在子流域尺度上,在连续模拟下,单次风暴事件下的近最优位置要么最大,要么没有。
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引用次数: 1
Assessing water use and reuse options - a holistic analysis of a Model City, coupling dynamic system modelling with Life Cycle Assessment 评估水的使用和再利用方案——对模型城市的整体分析,将动态系统建模与生命周期评估相结合
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-06-02 DOI: 10.1080/1573062X.2023.2211959
Y. Gilboa, E. Friedler, M. Schütze
ABSTRACT A dynamic model, fed with time-variant inputs, of the entire water urban system, coupled with Life Cycle Assessment (LCA) and Life Cycle Costing (LCC), was developed and applied to perform water balance analysis and to assess the environmental and economic aspects of water reuse. Six scenarios using different water sources potable water, rainwater, greywater, and treated wastewater were compared for a future Model City under typical Israeli conditions. The integrated dynamic simulation-LCA-LCC approach considers demands for several water resources and their availability, contains several feedback loops in the water system, and can be applied to any case study. Finally, the combined simulation-LCA-LCC was embedded into an optimisation framework. Results indicate that using treated greywater or treated wastewater for non-potable uses were the most economical scenarios. Business-as-usual scenario, where all urban water functions use potable water, displays the largest negative environmental impacts in all categories compared to using alternative water sources.
摘要开发了一个包含时变输入的整个水-城市系统的动态模型,结合生命周期评估(LCA)和生命周期成本计算(LCC),并将其应用于水平衡分析和水再利用的环境和经济方面的评估。在典型的以色列条件下,对未来模范城市使用不同水源——饮用水、雨水、灰水和处理过的废水的六种情景进行了比较。综合动态模拟LCA-LCC方法考虑了对几种水资源的需求及其可用性,包含了水系统中的几个反馈回路,可应用于任何案例研究。最后,将组合仿真LCA-LCC嵌入到优化框架中。结果表明,将经处理的灰水或经处理的废水用于非饮用用途是最经济的方案。与使用替代水源相比,所有城市供水功能都使用饮用水的照常营业场景在所有类别中显示出最大的负面环境影响。
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引用次数: 0
Energy recovery strategies in water distribution networks: literature review and future directions in the net-zero transition 配水网络中的能量回收策略:文献综述和净零转型的未来方向
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-05-31 DOI: 10.1080/1573062x.2023.2212271
C. Giudicianni, D. Mitrovic, W. Wu, G. Ferrarese, F. Pugliese, I. Fernández-García, A. Campisano, F. De Paola, S. Malavasi, H. Maier, D. Savic, E. Creaco
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引用次数: 3
European stakeholders’ visions and needs for stormwater in future urban drainage systems 欧洲利益相关者对未来城市排水系统中雨水的愿景和需求
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-05-31 DOI: 10.1080/1573062X.2023.2211559
K. Tondera, E. Brelot, Fanny Fontanel, F. Cherqui, Jesper Ellerbæk Nielsen, Thomas Brüggemann, I. Naismith, Marcel Goerke, Joaquín Suárez López, J. Rieckermann, J. Leitão, F. Clemens-Meyer, Antonio M. Moreno-Rodenas, S. Tait, J. Anta
ABSTRACT Transitioning urban drainage systems to serve water-smart societies requires the involvement of different disciplines and stakeholders. However, stakeholders have different visions and needs from the transitioning process (e.g in terms of financing, policy adaptation and system management) these also vary between regions and countries. Identifying such different needs for stakeholders is necessary to propose practical adaptation strategies. Therefore, evidence of needs as reflected in policy papers and legislation in seven European countries was collected. Knowledgeable individuals in the urban drainage community were asked about their visions. Results show that whilst there is consensus on the challenges, visions on how to transition are diverse, indicating that more interaction between the different stakeholder groups is required to develop consensus. Additionally, organisational and legislative structures often slow down the necessary change processes.
摘要转变城市排水系统以服务于水智能社会需要不同学科和利益相关者的参与。然而,利益攸关方在过渡过程中有不同的愿景和需求(例如在融资、政策调整和系统管理方面),这些也因地区和国家而异。确定利益攸关方的这种不同需求对于提出切实可行的适应战略是必要的。因此,收集了七个欧洲国家的政策文件和立法中反映的需求证据。城市排水社区中知识渊博的人被问及他们的愿景。结果表明,虽然对挑战达成了共识,但对如何过渡的愿景是多样的,这表明需要不同利益相关者群体之间进行更多的互动才能达成共识。此外,组织和立法结构往往会减缓必要的变革进程。
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引用次数: 0
Sewer network design methodology for low-cost, resilient, and reliable designs 低成本、弹性和可靠设计的下水道网络设计方法
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-05-31 DOI: 10.1080/1573062X.2023.2218339
J. Saldarriaga, Juana Herrán
ABSTRACT When designing a sewer system, the goal is to find the design with the lowest cost while complying with the hydraulic constraints. However, with the emergence of new concerns like climate change and high-density urbanization, those designs must also be reliable and resilient. This is the objective of the present research, to provide an approach for finding low-cost, sewer networks design while considering the reliability and the resilience as a criterion in the selection of the best design. For that purpose, a method is proposed for evaluating resilience and reliability in a variety of designs produced by modifying the objective function of the network’s layout selection model. The methodology was tested in four scenarios using two cost equations and two sewer network benchmarks from the literature. In most of the scenarios, it was possible to find designs with lower cost and higher resilience and reliability than those previously published.
摘要设计下水道系统时,目标是在满足水力约束的情况下找到成本最低的设计。然而,随着气候变化和高密度城市化等新问题的出现,这些设计也必须可靠和有弹性。这就是本研究的目的,为寻找低成本的下水道网络设计提供一种方法,同时将可靠性和弹性作为选择最佳设计的标准。为此,提出了一种通过修改网络布局选择模型的目标函数来评估各种设计中的弹性和可靠性的方法。该方法使用文献中的两个成本方程和两个下水道网络基准在四个场景中进行了测试。在大多数情况下,可以找到比以前发表的设计成本更低、弹性和可靠性更高的设计。
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引用次数: 0
Effect of pre-chlorination on Microcystis aeruginosa cell integrity and microcystins removal 预氯化对铜绿微囊藻细胞完整性及微囊藻毒素去除的影响
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-05-30 DOI: 10.1080/1573062X.2023.2218347
Alexander Ossanes de Souza, Kazumi Kinoshita Teramoto, Paloma Nathane Nunes de Freitas, Éryka Costa de Almeida, Sidney Seckler Ferreira Filho, E. Pinto
ABSTRACT High nutrient input into waterbodies increases potentially toxic cyanobacteria blooms. Pre-chlorination treatment is excellent for cyanobacterial cell inactivation and dissolved cyanotoxins removal in water supply sources. This study aims to evaluate the pre-chlorination effect treatment on Microcystis aeruginosa cell integrity and its hepatotoxins (microcystins, MC) release and degradation on a laboratory scale. Loss of cell integrity is observed with increasing chlorine concentration. The maximum cell permeability without cell disintegration occurs at 2.5 mg Cl2 L−1. Degradations up to 70% and chlorophyll-a reductions over 70% are observed after 60 min exposure, with complete degradation at 2.5 and 3 mg Cl2 L−1. However, chlorine (Cl2) exposure over 40.66 mg min L−1 is required for microcystins MC-LR (i.e. radicals: leucine (L) and arginine (R)) and MC-RR (i.e. radicals: arginine and arginine) oxidation oxidation to concentrations below the legislation value for water potability.
高营养输入水体增加潜在的有毒蓝藻华。预氯化处理是极好的蓝藻细胞灭活和溶解的蓝藻毒素去除在供水来源。本研究旨在评价预氯化处理对铜绿微囊藻细胞完整性及其肝毒素(微囊藻毒素、MC)释放和降解的影响。随着氯浓度的增加,观察到细胞完整性的丧失。在2.5 mg Cl2 L−1时,细胞通透性达到最大值而不发生细胞解体。暴露60分钟后,观察到降解高达70%,叶绿素-a减少超过70%,在2.5和3 mg Cl2 L−1下完全降解。然而,微囊藻毒素MC-LR(即自由基:亮氨酸(L)和精氨酸(R))和MC-RR(即自由基:精氨酸和精氨酸)的氧化需要超过40.66 mg min L−1的氯(Cl2)暴露至低于饮用水立法值的浓度。
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引用次数: 1
Optimization of coagulation-flocculation process with dehulled and unhulled Moringa oleifera cake powder by 25 full factorial design and artificial neural networks: effect on dam water quality 用25全因子设计和人工神经网络优化脱壳辣木饼粉混凝-絮凝工艺对大坝水质的影响
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-05-29 DOI: 10.1080/1573062X.2023.2217656
Amina Kribeche, Nadir Ben Hamiche, Baya Ladjouze, Saliha Arbaoui
ABSTRACT This study explores parametric optimization of coagulation-flocculation process using statistically designed experimentation via two-level, five factors full factorial design (FFD) and artificial neural network (ANN). The experimental design was produced using Coagulant dosage ), Fast mixing ), Slow mixing ), Settling time and Seeds kind . Turbidity removal, pH and conductivity variations have been adopted as responses/outputs. The efficiency of Moringa oleifera Lam (MO) seeds cake powder was tested using dehulled (DSCP) and unhulled (USCP) seeds on dam water treated for drinking purposes. Both methods modelled Turbidity removal with high accuracy with a coefficient of determination ( ) of 0.90 and 0.96 for FFD and ANN, respectively. Validation tests also proved to have good efficiency, with a removal rate of 90.42%, which is very close to that obtained by FFD (90.71%) and ANN (92.33%) models. Thus, MO seeds cake powder could serve as a replacement for the chemicals widely used.
摘要本研究采用统计设计实验,通过二水平、五因素全因子设计(FFD)和人工神经网络(ANN),探讨混凝-絮凝过程的参数优化。采用混凝剂投加量、快混、慢混、沉降时间和种子种类进行试验设计。浊度去除、pH值和电导率变化被用作响应/输出。用脱壳(DSCP)和去壳(USCP)辣木籽饼粉对大坝饮用水处理效果进行了试验研究。两种方法对浊度去除的建模精度都很高,FFD和ANN的决定系数()分别为0.90和0.96。验证试验也证明了该模型具有良好的效率,去除率为90.42%,与FFD模型(90.71%)和ANN模型(92.33%)的去除率非常接近。因此,MO种子饼粉可以作为广泛使用的化学品的替代品。
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引用次数: 0
The impact of stormwater management strategies on the flow regime of a peri-urban catchment facing urbanisation and climate change: a distributed modelling study in Lyon, France 面对城市化和气候变化,雨水管理策略对城郊集水区流量的影响:法国里昂的一项分布式模型研究
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-05-27 DOI: 10.1080/1573062X.2023.2217809
Jérémie Bonneau, F. Branger, H. Castebrunet, G. Lipeme Kouyi
ABSTRACT The relative impact of urbanisation (urban sprawl), climate change (rainfall and evapotranspiration) and stormwater disconnection strategies (implementation of green infrastructure (GI)) on a peri-urban stream in the western suburbs of Lyon, France, was investigated using a distributed, physically based model (J2000P). Results showed that ambitious catchment-scale implementation of GI has the potential to mitigate some hydrological effects of urbanisation, especially a drastic reduction of combined sewer overflows. However, GI did not have a large impact on the stream flow regime, especially in the context of climate change, as the stream is dominated by non-urban contributions. Spatially distributed models have the capacity to inform river managers about the extent of implementation of GI needed to achieve given management goals and highlight some limitations of disconnection strategies. Indeed, while GI improved the resilience of sewer networks to global change, it was not sufficient to compensate for the effects of climate change on streamflow.
采用分布式物理模型(J2000P)研究了城市化(城市蔓延)、气候变化(降雨和蒸散)和雨水中断策略(绿色基础设施(GI)的实施)对法国里昂西郊城郊河流的相对影响。结果表明,雄心勃勃的流域尺度GI实施有可能减轻城市化的一些水文影响,特别是大幅度减少联合下水道溢流。然而,地理指数对河流流量的影响并不大,特别是在气候变化的背景下,因为河流主要由非城市贡献。空间分布模型有能力告知河流管理者实现给定管理目标所需的地理标志实施程度,并强调断开策略的一些局限性。事实上,虽然地理指数提高了下水道网络对全球变化的适应能力,但它不足以弥补气候变化对水流的影响。
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引用次数: 0
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Urban Water Journal
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