Regional Wastewater System Planning under Population Dynamics Uncertainty

Zeferino, João A.; Antunes, António Pais; Cunha, Maria da Conceição

doi:10.1061/(asce)wr.1943-5452.0000334

Cited by 18 publications

(12 citation statements)

References 40 publications

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“…Model and solution robustness [45][46][47] Regret models [48][49][50][51] Phased and flexible design approaches…”

Section: Stochastic Approachmentioning

confidence: 99%

“…This means that the regret is understood as the difference between the cost of a solution obtained for a set of scenarios, and the cost of the optimal solution for each scenario considered individually. Regret models will not be further described in this paper, but for the interested reader, some relevant references are [1,[48][49][50][51]68].…”

Section: Stochastic Approachmentioning

confidence: 99%

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Robust Design of a Real-Life Water Distribution Network under Different Demand Scenarios

Vertommen

Laarhoven

Cunha

2021

Water

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In this paper a scenario-based robust optimization approach is proposed to take demand uncertainty into account in the design of water distribution networks. This results in insight in the trade-off between costs and performance of different designs. Within the proposed approach the designer is able to choose the desired degree of risk aversion, and the performance of the design can be assessed based on the water demand effectively supplied under different scenarios. Both future water demand scenarios and scenarios based on historical records are considered. The approach is applied to the design of a real-life water distribution network supplying part of a city in the Netherlands. From the results the relation between costs and performance for different scenarios becomes evident: a more robust design requires higher design costs. Moreover, it is proven that numerical optimization helps finding better design solutions when compared to manual approaches. The developed approach allows water utilities to make informed choices about how much to invest in their infrastructure and how to design it in order to achieve a certain level of robustness.

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“…Model and solution robustness [45][46][47] Regret models [48][49][50][51] Phased and flexible design approaches…”

Section: Stochastic Approachmentioning

confidence: 99%

Section: Stochastic Approachmentioning

confidence: 99%

Robust Design of a Real-Life Water Distribution Network under Different Demand Scenarios

Vertommen

Laarhoven

Cunha

2021

Water

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“…Consequently, sewer system of Karbala often fails to handle the amount of sewer produced by large population. Sewer overflow occurs when the peak flow exceeds 10 times of the carrying capacity of sewer pipes of the city (Obaid et al 2014a, b;Ying and Sansalone 2010;Zeferino et al 2012). In such situation, the sewer water spills through gullies or manholes, causing flooding and environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

A sewer overflow mitigation during festival and rainfall periods: case study of Karbala

Alisawi

2020

Appl Water Sci

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The objective of the present study to assess the performance of a suggested sewer line by using pipe jacking system (PJS) in order to enhance the sewage capacity and mitigate sewer flooding of historic pilgrimage city of Karbala, Iraq. The storm water management model (SWMM5) was used for this purpose. The simulation of exiting sewer system reveals that sewer discharge during peak pilgrimage period is more than 200% of the capacity of existing sewer line. Installation of SLL having a diameter of 2.5 m at a depth ranging between 12 and 22 m by PJS can reduce water depth in sewer pipe by 78%. The reduction of water depth at sewer pipe can reduce sewer overflow up to 70%, if the system is installed and managed properly. The methodology proposed in the paper can be applied in any location having similar problem with necessary modifications.

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“…They developed full-scale field data sets where the results show a good agreement between observed and simulated data both for the total suspended solids and the total chemical oxygen demand. A designated as expected-regret model, α-reliable model and β-reliable model were used to find a solution that also minimizes the expected regret with respect to total costs, but disregarding the most unfavorable scenarios in terms of expected regret [44]. They were developed for the North Baixo Mondego area, in central Portugal, the results were obtained through the models to provide clear insights into the planning decisions to make and do not require excessive computational effort.…”

Section: Sewer Water Qualitymentioning

confidence: 99%

Modeling Sewer Overflow of a City with a Large Floating Population

Ha¹,

Kn²,

Shreeshivadasan³

2014

Hydrol Current Res

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The sewer system of many historical or holy cities is not well associated with the present need. The managing of the sewer system of such cities is very difficult. Karbala, located in central Iraq, is one such city that experiences tremendous pressure on its sewer system due to large visiting population during special religious gathering. As the sewer system of Karbala city is not designed for such high population like many other historic or holy cities, the sewer overflows, inundate the roads, and degrade the environmental due to the polluted sewer during religious gatherings. The problem often becomes critical due to heavy rainfall as the gathering usually happens during monsoon. The modeling of the sewer water quantity with a varying population and rainfall is important for simulating the sewer overflow as well as to manage the sewer system. The modeling of the sewer water quality is also important to understand the possible environmental hazard due to the sewer overflow. In this present study, an attempt has been taken to simulate the spatiotemporal distribution of the sewer water quantity and quality with a varying population and rainfall for the prediction of sewer overflow and possible pollution susceptibility. The Stormwater Management Model (SWMM) will be used in the proposed study. The simulation will be carried out in the city center of the Karbala city where the stormwater network is not fully developed. It is expected that this study will help in the operational management of the sewerage system and mitigate the sewer flooding and related environmental problems.

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Regional Wastewater System Planning under Population Dynamics Uncertainty

Cited by 18 publications

References 40 publications

Robust Design of a Real-Life Water Distribution Network under Different Demand Scenarios

Robust Design of a Real-Life Water Distribution Network under Different Demand Scenarios

A sewer overflow mitigation during festival and rainfall periods: case study of Karbala

Modeling Sewer Overflow of a City with a Large Floating Population

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