Building Network Models
HydroCo have built network models for a significant proportion of the UK water industry, covering millions of miles of pipe work, and customer connections.
A network model is typically built in two phases, although sometimes it is necessary to take a flexible approach to this methodology to fit with our clients’ requirements.
Building a model is a complex process, with project lifespans typically ranging from 3-9 months in duration.
Phase 1 – Base model creation
The process starts by converting key asset data from the organisations Geographical Information System (GIS) into a modelling friendly format. HydroCo have developed a series of bespoke conversion tools which allow us to deliver accurate, yet cost effective GIS conversion routines.
Phase 1 – Data collection and validation
Historical telemetry data is used to perform a detailed analysis and verification process. Initial demands are calculated for each area, missing flow metering is identified, reservoir and trunk main balances are derived. This desktop analysis is key to understanding the water network prior to any abortive field testing activities.
Phase 1 – Operational model
At this stage we use the verified desktop study data and create a fully functioning phase 1 model. This also helps identify any anomalies or erroneous data prior to the field test, allowing for additional logger deployment during the field test to help resolve these issues.
Phase 2 – Field Test
The next phase is to collect a detailed cohesive data set, to facilitate model calibration. HydroCo perform all our own field tests, and are used to deploying up to 500 loggers to capture the operation of a system in detail.
Phase 2 – Data collection and validation
Similar to the phase 1 exercise – these data verification checks are repeated to ensure a high quality data set has been achieved.
Phase 2 – Calibration
The model results are compared to the field test data, and adjusted in order to replicate the hydraulics of the system. This is a highly skilful part of the model build process, and performed by our senior staff members, who have a wealth of experience.
Phase 2 – Reporting & Handover
This final, yet important process explains the precise methodology employed during the project, and more importantly, the issues experienced during the model build. Our clients appreciate our attention to detail in our reporting process, not only covering the calibration process and performance of the system, but also identifying any operational issues in the system and advising our clients on ways to optimise and improve.
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