Transitioning of Urban Water Distribution Systems

Sempewo, Jotham Ivan; Vairavamoorthy, Kalanithy; Grimshaw, Frank

doi:10.1061/41114(371)372

Cited by 2 publications

(3 citation statements)

References 176 publications

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“…“Network transitioning” describes the pathway from an existing (source) network to a future (destination) network [ 6 ]. Usually transition processes of water infrastructure are relatively slow and take place over decades, where the network structure remains nearly constant (see e.g., Ref.…”

Section: Introductionmentioning

confidence: 99%

“…However, disconnections and uncertainties of the network topology were not considered in their works. Existing studies of complex real world WDN transitions are limited and therefore further research is necessary also with regard to exploring case studies of unspecific methods [ 19 , 20 ]. A promising concept is the creation of many possible future network layouts, rather than assessing a fixed topology.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Morphogenesis of Urban Water Distribution Networks: A Spatiotemporal Planning Approach for Cost-Efficient and Reliable Supply

Zischg

Rauch

Sitzenfrei

2018

Entropy

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Cities and their infrastructure networks are always in motion and permanently changing in structure and function. This paper presents a methodology for automatically creating future water distribution networks (WDNs) that are stressed step-by-step by disconnection and connection of WDN parts. The associated effects of demand shifting and flow rearrangements are simulated and assessed with hydraulic performances. With the methodology, it is possible to test various planning and adaptation options of the future WDN, where the unknown (future) network is approximated via the co-located and known (future) road network, and hence different topological characteristics (branched vs. strongly looped layout) can be investigated. The reliability of the planning options is evaluated with the flow entropy, a measure based on Shannon’s informational entropy. Uncertainties regarding future water consumption and water loss management are included in a scenario analysis. To avoid insufficient water supply to customers during the transition process from an initial to a final WDN state, an adaptation concept is proposed where critical WDN components are replaced over time. Finally, the method is applied to the drastic urban transition of Kiruna, Sweden. Results show that without adaptation measures severe performance drops will occur after the WDN state 2023, mainly caused by the disconnection of WDN parts. However, with low adaptation efforts that consider 2–3% pipe replacement, sufficient pressure performances are achieved. Furthermore, by using an entropy-cost comparison, the best planning options are determined.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Morphogenesis of Urban Water Distribution Networks: A Spatiotemporal Planning Approach for Cost-Efficient and Reliable Supply

Zischg

Rauch

Sitzenfrei

2018

Entropy

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“…Therefore, future changes in demographic, climatic and socioeconomic developments are going to be the key drivers for changing the system's structure and operation [2]. In this context, the term "transition" is used to describe the pathway from an initial (current) to a final (planning) development stage in a WDS, including its structural and functional changes over time [3]. The intermediate development stages (i.e., specific points in time during the transition process), also including the initial and final development stage, are hereinafter defined as transition stages.…”

Section: Introductionmentioning

confidence: 99%

Enabling Efficient and Sustainable Transitions of Water Distribution Systems under Network Structure Uncertainty

Zischg

Mair

Rauch

et al. 2017

Water

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This paper focuses on the performance of water distribution systems (WDSs) during long-term city transitions. A transition describes the pathway from an initial to a final planning stage including the structural and functional changes on the infrastructure over time. A methodology is presented where consecutive WDSs under changing conditions are automatically created, simulated and then analyzed at specific points in time during a transition process of several decades. Consequential WDS analyses include (a) uncertain network structure, (b) temporal and spatial demand variation and (c) network displacement. With the proposed approach, it is possible to identify robust WDS structures and critical points in time for which sufficient hydraulic and water quality requirements cannot be ensured to the customers. The approach is applied to a case study, where a WDS transition of epic dimensions is currently taking place due to a city relocation. The resulting necessity of its WDS transition is modelled with automatically created planning options for consecutive years of the transition process. For the investigated case study, we tested a traditional "doing-all-at-the-end" approach, where necessary pipe upgrades are performed at the last stages of the transition process. Results show that the sole design of the desired final-stage WDS is insufficient. Owing to the drastic network deconstruction and the stepwise "loss of capacity", critical pipes must be redesigned at earlier stages to maintain acceptable service levels for most of the investigated future scenarios.

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Transitioning of Urban Water Distribution Systems

Cited by 2 publications

References 176 publications

Morphogenesis of Urban Water Distribution Networks: A Spatiotemporal Planning Approach for Cost-Efficient and Reliable Supply

Morphogenesis of Urban Water Distribution Networks: A Spatiotemporal Planning Approach for Cost-Efficient and Reliable Supply

Enabling Efficient and Sustainable Transitions of Water Distribution Systems under Network Structure Uncertainty

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