water distribution software Articles
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Graph-based approach for generating virtual water distribution systems in the software VIBe
Application of virtual case studies (VCS) is a well established technique in environmental engineering to test measures, approaches, models or software. However, preparation of VCS for an infrastructure network is a tedious task. In literature, approaches can be found which generate very simplified VCS, which are only partly comparable with real world case studies. VCS which are more comparable ...
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The extension of EPANET source code to simulate unsteady flow in water distribution networks with variable head tanks
This paper describes the modifications applied to EPANET, a public-domain water distribution system modelling software package, that does not correctly compute the hydraulics of a water distribution network (WDN) with variable tank heads in (slow) unsteady flow conditions. Firstly the methodology adopted to extend the Global Gradient Algorithm (GGA) implemented in the original EPANET source ...
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Some explicit formulations of Colebrook–White friction factor considering accuracy vs. computational speed
The Colebrook–White formulation of the friction factor is implicit and requires some iterations to be solved given a correct initial search value and a target accuracy. Some new explicit formulations to efficiently calculate the Colebrook–White friction factor are presented herein. The aim of this investigation is twofold: (i) to preserve the accuracy of estimates while (ii) reducing the ...
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Sensitivity of algorithm parameters and objective function scaling in multi-objective optimisation of water distribution systems
This paper presents an extensive analysis of the sensitivity of multi-objective algorithm parameters and objective function scaling tested on a large number of parameter setting combinations for a water distribution system optimisation problem. The optimisation model comprises two operational objectives minimised concurrently, the pump energy costs and deviations of constituent concentrations ...
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Water quality assessment of Yamuna River in Delhi region using index mapping
Water quality indices (WQI) were introduced with the aim of reducing great amount of parameters into a simpler expression and enabling easy interpretation of monitoring data. In this study, an attempt has been made to devise a methodology to integrate the WQI with geographic information system (GIS) for an effective interpretation of the quality status of the river. River Yamuna in Delhi has been ...
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Fayette county utilizes a new asset management program
The Fayette County Water System is an expansive one, providing service to Tyrone, Pcachtree City, Woolsey, Brooks, part of Fayetteville, and part of the unincorporated County, with its two plants, which have a total production capacity of 20.525 million gallons per day (MGD). So when Lee Pope, Water System Director, discovered that several of the System's eight pumps were not operating as ...
By Cartegraph
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On the weaknesses and limitations of EPANET as regards energy
With more than 1,500 citations in ranked journals and hundreds of thousands of downloads, EPANET is the benchmark software for analysis and design of pressurized water distribution networks. User-friendly, powerful and reliable, its public domain use has spread throughout the world. However, from an energy standpoint its capacity is limited to the point at which, in certain circumstances it ...
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We Need to Talk About Peaking Factors
In the design of water networks ‘peaking factors’ are used for simulating design flows in hydraulic models. In simple terms, the dimensionless peaking factor is maximum over average consumption. Historically, utilities adopted standardized peaking factors based on their source data (treatment plant etc.) which was the most reliable source of data. But as we enter the world of big ...
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ESM30 conducts autonomous water sampling and monitoring - Case Study
Background Wuhan is the capital city of Hubei province in central China which has 166 lakes that cover 2,217 square km approximately counting 25% of the city. Its water coverage is one of the world’s highest. The Wuhan Environmental Protection Bureau is responsible for monitoring the surface water quality by surveying a subset of 50 lakes of their temperature, conductivity, pH, ...
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