Short-term impacts of the filling transition across elevations in intermittent water supply systems

Weston, Sally; Loubser, Carlo; Jacobs, Heinz Erasmus; Speight, Vanessa

doi:10.1080/1573062x.2022.2075764

Cited by 9 publications

(7 citation statements)

References 24 publications

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“…Experimental works were also carried out (Walter et al 2017;Weston et al 2022) using one pipe connected to an RSV. Walter et al (2017) investigated the metering errors caused by air resulting from pipeline filling.…”

Section: Integration Of Periodic Filling and Emptying Process In The ...mentioning

confidence: 99%

“…Walter et al (2017) investigated the metering errors caused by air resulting from pipeline filling. Weston et al (2022) explored the effects of some hydraulic parameters (initial/final pressure, initial/final flow rate, valve operation speed, and leakage percentage) on the filling and emptying of pipes. They observed the negative pressures and over-pressurisation of the system, which can be associated with the water quality.…”

Section: Integration Of Periodic Filling and Emptying Process In The ...mentioning

confidence: 99%

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Review of hydraulic modelling approaches for intermittent water supply systems

Sarisen

Koukoravas

Farmani

et al. 2022

Journal of Water Supply: Research and Technology-Aqua

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Intermittent water supply (IWS) is widely used around the world, and with the increase in population and predicted future water scarcity, IWS applications seem to continue. While most of the existing studies on water supply concentrate on continuous water supply (CWS), the research focused on the IWS is now becoming mainstream. Hydraulic modelling is an effective tool for the process of planning, design, rehabilitation, and operation of water distribution systems. It helps significantly in engineers’ decision-making process. The necessity of modelling IWS systems arises from the complexity and variety of problems caused by intermittency. This paper offers a review of the state-of-the-art IWS modelling and identifies the key strengths and limitations of the available approaches, and points at potential research directions. Currently, neither computer software nor a practically used approach is available for modelling IWS. For a rigorous simulation of IWS, system characteristics first need to be understood, i.e., the user behaviour under pressure-deficient conditions, water losses, and filling and emptying processes. Each of them requires further attention and improvement. Additionally, the necessity of real data from IWSs is stressed. Accurate modelling will lead to the development of improved measures for the problems caused by intermittency.

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Section: Integration Of Periodic Filling and Emptying Process In The ...mentioning

confidence: 99%

Section: Integration Of Periodic Filling and Emptying Process In The ...mentioning

confidence: 99%

Review of hydraulic modelling approaches for intermittent water supply systems

Sarisen

Koukoravas

Farmani

et al. 2022

Journal of Water Supply: Research and Technology-Aqua

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…While low pressures and pressure transients are components of IWS cycles, their frequency and severity in IWS systems and subsequent impacts on infrastructure and health risk are poorly understood and are difficult to study. 15,19,20 These pressure events can result in intrusion of contaminants if there is an external source of contamination and there is a pathway for that contaminant to enter the distribution. [21][22][23] Culture-based techniques using indicator organisms have been widely used to assess microbial water quality in IWS systems and have shown that water quality can deteriorate during distribution and after household storage.…”

Section: Introductionmentioning

confidence: 99%

Bacterial communities in a neotropical full-scale drinking water system including intermittent piped water supply, from sources to taps

Chavarria,

Gonzalez,

Goodridge

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…Several attempts to couple the transient free-surface and pressurized ows in distribution pipes toward modeling the hydraulics within IWS systems (Liou and Hunt 1996;Bourdarias et al 2008 Weston et al 2022) can be seen in the literature. However, consumer behavior in IWS systems is surprisingly overlooked in most of them.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the role of consumer behavior in coping with intermittent supply in water distribution systems

Abhijith

Naidu

Boindala

et al. 2022

Preprint

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In developing countries, most water distribution systems (WDS) are operated as intermittent water supply (IWS) systems. A significant share of them also delivers water to consumers in irregular and unreliable ways. To meet water demands under such inconsistent WDS operations, IWS consumers commonly adapt to flexible consumption behaviors characterized by storing the limited water available during shorter supply periods in intermediate storage facilities for subsequent usage during more extended non-supply periods. Towards accounting for this characteristic behavior in understanding the IWS behavior more realistically, this paper presented the development, functioning, and application of a novel open-source PYTHON-based simulation tool (EPyT-IWS) for WDS, virtually acting like an IWS modeling extension of EPANET 2.2. EPyT-IWS integrates EPANET 2.2 solver with an independent hydraulic solver to mimic the water withdrawal during supply periods, storage in intermediate storage facilities, and subsequent use. The applicability of the simulation tool was demonstrated by performing extended-period hydraulic simulations on a typical WDS with representative IWS attributes. The simulation outcomes showed that practicing the typical consumption behavior, involving storing water within underground tanks and later pumping it into overhead tanks, allows consumers to cope with the intermittent water availability and meet their demands very suitably. Besides the water supply duration, the clock time of water supply in IWS systems was predicted to influence consumers' ability to fill the intermediate storage tanks and meet water demands. This study's overall findings can advance the state-of-the-art for planning, designing, and operating WDS with IWS characteristics.

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Short-term impacts of the filling transition across elevations in intermittent water supply systems

Cited by 9 publications

References 24 publications

Review of hydraulic modelling approaches for intermittent water supply systems

Review of hydraulic modelling approaches for intermittent water supply systems

Bacterial communities in a neotropical full-scale drinking water system including intermittent piped water supply, from sources to taps

Analyzing the role of consumer behavior in coping with intermittent supply in water distribution systems

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