Maintaining Welsh Water’s hydrometric network
Posted: Monday 21st May 2007
National consultancy Hydro-Logic has been appointed by Dwr Cymru Welsh Water (DCWW) to service and maintain its hydrometric network.
It is a six-year contract worth over £1 million and is the second time that Hydro-Logic has successfully tendered for it.
The network of recording stations supplied to DCWW provides information on compensation flows and river flow as well as reservoir and borehole levels. Data are transmitted from most sites on a daily basis using the VF and Hawk series of telemetry loggers utilising PSTN, GSM or satellite transmission systems.
Data checks are performed daily on Hydro-Logic's FEP6 and Timeview systems that enable prompt identification of compliance issues or measurement problems. All sites are visited on a monthly basis by Hydro-Logic staff for routine maintenance.
Raw data are transferred to DCWW on a daily basis, with monthly transfers of data that has been validated. The data is used for both operational management and as part of water resource investigations.
This is in accordance with the environmental compliance requirements established with the Environment Agency. This makes provision for satisfying minimum flow requirements so there is enough water in the rivers for fish and other wildlife, and sufficient water downstream for other users.
The project represents an example of good collaboration of different teams within Hydro-Logic working in partnership with DCWW.
