In water distribution systems (WDSs), the available flow at a demand node is dependent on the pressure at that node. When a network is lacking in pressure, not all consumer demands will be met in full. In this context, the assumption that all demands are fully satisfied regardless of the pressure in the system becomes unreasonable and represents the main limitation of the conventional demand dr...

In the field of water distribution systems the EPANET 2 toolkit is considered nowadays the industry standard for hydraulic modelling. Unfortunately, the design and programming model of EPANET 2 have some limitations that make any attempt to extend its hydraulic solver, add new functionalities or improve performance difficult to achieve and time consuming. A new software toolkit for water distri...

Several indices have been used in the past for the assessment of the performance of water distribution systems. In this paper the performance of water distribution systems is evaluated using the resilience index and the failure index proposed by Todini (2000). The method is demonstrated through the analysis of a real world application, the water distribution system of the town of Sofades in Cen...

In this paper, an evolutionary algorithm, called EA-WDND, is developed to optimize water distribution network design for real instances. The evolutionary algorithm uses the Epanet Solver which, while not an optimizer, helps to evaluate the operational constraints of mass conservation, energy conservation, pressure in nodes (nodal heads) of the network, and velocities of water in network pipes. ...

RESUME. Pour parvenir à illustrer l’utilité des SIG dans le domaine de l’alimentation en eau potable, nous nous sommes proposés d’élaborer un modèle de données SIG pour les réseaux d’eau potable de la SONEDE. La création de ce modèle est faite à partir de l’analyse des fiches d’informations élaborées par la société pour la collecte des données sur le terrain. Après sa validation par le gestionn...

The optimisation of pump operations in water distribution networks is an ongoing research topic motivated by the great energy savings that a careful scheduling of pumps may achieve. State-of-the-art approaches often combine an optimisation algorithm, such as Evolutionary Algorithms, and full hydraulic simulation. Despite the advances in optimisation techniques and hardware performance, the time...

The main objectives of this paper are, designing and balancing of Water Distribution Network (WDN) based on loops hydraulically balanced method as well as using Geographical Information System (GIS) methodology with the contribution of EPANET. GIS methodology is used to ensure WDN’s integrity and skeletonized a proper and functional WDN by using Network Analyst utilizing the geometric network a...

Typically, computer-based tools built on mathematical models define the time-series behavior of contaminants, in dissolved or colloidal form, within spatial boundaries water distribution systems (WDS). EPANET-MSX has become a standard tool for WDS quality modeling due to its collaboration with EPANET. The critical challenges applying include conceptualizing exchanges among multiple reacting con...

Abstract This work compares several alternative methods of pressure-driven analysis (PDA) implemented within the code base EPANET water distribution system modeling software. The resulting includes a direct method, original and newly modified version inverse method currently used by 2.2, two recently published (the global gradient approach-based PDA active set method). latter four solve problem...