Monitoring & metering


OFF-GRID MONITORING SOLUTION FOR A REMOTE CORNISH LOCATION


communications, and was developed to provide a number of important advantages,” says Will Hancock, project lead at the EA. Level and flow monitors were installed in the River Cober, the Loe Pool and in the new outfall pipe. “This provided us with the ability to monitor the site remotely,” Hancock explains, “which meant that less site visits were necessary, lowering project costs and carbon footprint, and enabling us to respond to flood risk in a faster and more timely manner.”


The new monitoring system was designed to detect the excessive accumulation of water in the pool, so that the second outflow could be implemented when necessary. Under such


Instrumentation Monthly August 2025


circumstances, an excavator is used to expose and open the outfall cover before the sluice gate is opened and the pumps are allowed to remove water from the pool, for discharge to the beach. Over the last five years, the second outfall has been opened on two occasions.


NEW FLOW MONITORING TECHNOLOGY


Prior to the installation of the new monitoring system from Nivus, flow was measured in Helston and in the discharge pipes with a traditional Doppler flow meter, and the failure of one of these units provided the EA with an opportunity to review and upgrade the monitors.


Explaining the evaluation process, Hancock says: “These measurement instruments perform a critically important function. Not only do they help manage the Loe Pool to lower flood risk, they also feed data into our flood forecasting model, so it was essential that we utilise accurate, reliable instrumentation. The EA has extensive experience with flow measurement technologies, including the cross- correlation method from Nivus, so it was determined that this would be the appropriate solution for the discharge pipes and the river monitor. The key advantage to this area velocity flow measurement technique over the instruments which it replaced is that it provides a three-dimensional flow profile that


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