Water & Wastewater Treatment

WWT January 2020

Water & Wastewater Treatment Magazine

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Page 17 of 39

18 | JANUARY 2020 | WWT | www.wwtonline.co.uk The Knowledge This case study examines how Anglian Water used pipeline assessment technology to determine the condition and remaining service life of a vital water main. K eeping its net- work of more than 38,000km (or 22,000 miles) of water mains in working order is extremely important for Anglian Water. The utility serves the East of England, an area that is among the driest in the country, receiving only ap- proximately 600mm (23.6in) of rain each year on average - significantly less than else- where in England. With more than six million customers in the region and in Hartlepool, Anglian Water's 27,500-sq-km (10,618-sq-mile) service area is the largest of any water and sewerage utility in England and Wales. "Some areas have a lower annual rainfall than Jerusalem," said Fionn Boyle, optimisation project engineer for Anglian Water. "That's why it's vital that we look a'er the water that we've got." Boyle said the region's topography provides little assistance for the utility. "Large parts of our region are typically flat and low-lying, with approximately a quarter of the land actually below sea level," said Boyle. "With few hills around to help out with gravity, Anglian Water has to rely on pumping water from place to place, and that uses lots of energy." This relative scarcity requires Anglian Water and its customers to do everything they can to make the most of the water they have—hence the utility's slogan, "love every drop." Rising demand In response to a projection of future significant population growth in the area, the utility evaluated 7.2km (4.5 miles) of an existing line between a res- ervoir and a treatment facility to determine if it could stand up to increased stress. "The population of Anglian Carrying out a pipeline assessment The Echologics team listening for leaks on site.

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