Wessex Water has awarded four framework agreement contracts for the provision of water-supply network modelling services.

The framework agreement covers the provision of services for the creation of new and maintenance of existing water-supply network models, and the development of advanced tools and automation processes for water-supply modelling.

Scope of activities to be provided under the framework includes:

• Receiving data from the water company for the study area downloaded from its graphical information system (GIS) (pipes, nodes, valves, address points, consumption, meters, preliminary pipe roughness values) to import into INFOWORKS PRO (WSPro)
• Undertaking supply network data validation to confirm accuracy of flow measurement and DMA zoning in the study area
• Designing, planning and undertaking the network field test for the purposes of gaining sufficient data to accurately calibrate the model and verify system operation.
• Data to be collected includes pressure measurements from temporary logger installation and collection at suitable locations within the network.
• Pressure loggers to be supplied by the supplier for the duration of the field test. Loggers would be expected to be installed for periods to enable continuous measurement.
• Collection and importation of field test data (pressure and flow) into the model and subsequent production of calibrated model by demand analysis, pipe roughness adjustment and setting controls for network elements including valves, pumps, reservoirs and transfers.
• Reporting system anomalies (pressure and flow) identified during the calibration process.
• Undertaking model use studies e.g. new or proposed development demand impact assessment, mains replacement including assessment for potential mains downsizing, network performance and pressure reduction assessment.
• Development of advanced tools and automation processes for water-supply modelling.

HydroCo Ltd, Atkins Ltd, Stantec UK Ltd and RPS Environmental Management Ltd have all been awarded contracts under the framework, which was tendered via Wessex Water’s Qualification System for Works and Professional Services.