GWM Water operates water supply systems in a number of large towns in the north-western region of Victoria including St Arnaud, Ararat, Stawell, Warracknabeal and Halls Gap/Pomonal. In order to support planning and operational decisions, a complete steady-state hydraulic model of this network was required. The total duration of the project was approximately three months.
Tonkin Consulting completed all the model build activities from the GIS input data provided by GWM Water. The project was split into two stages: physical model build and functional model build. GWMWater provided review comments after the delivery of each stage.
GIS data from GWM Water for pipes and network structures was imported into the WaterGEMS hydraulic modelling package. Internal diameters and roughness coefficients were assigned to the pipes based on available nominal diameter, material, class and age data.
The model also incorporated pump stations and storages. Storage dimensions and pump performance curves were sourced from construction drawings and supplier data. Pump control philosophy and set points were advised by GWMWater operations personnel.
The GIS water meter data was matched with billing data to assign demands to the meters. Diurnal consumption patterns were also assigned to these demands.
The model highlighted areas that experience low pressures during the high demand months. GWM Water is able to use these models for planning and operational decision making for the water supply network.