AWWA IMTECH51394

Since 1992, Severn Trent Water (STW), a major United Kingdom water companyproviding 8 million customers in the center of England with a water supply andsewerage disposal, has built only quasi-dynamic all-mains network models thatcontain every pipe. The increasingly sophisticated techniques and proceduresinvolved have become well established, but the time taken to build models of evergreater size and complexity has increased. When STW needed a model of Birmingham,a city of some 1.1 million customers, a new approach was required. As a result,STW awarded a series of contracts to Stoner Associates who were able to offer aninnovative methodology for model building. The construction of the BirminghamAll-Mains model commenced in 1995. Stoner Associates performed all data capturework in the United States and employed a local sub-consultant, Parkman Ltd., tocarry out all the data gathering, field testing and calibration work. The datacapture and model construction work carried out in the US consisted of three maintasks: digitizing the network; elevation assignment; and customer assignment.Simultaneous to the model construction, 148 district metered areas were fieldtested in the city. This required a phased approach due to ongoing rehabilitationwork with the STW distribution system. The final combined model contains inexcess of 76,000 nodes and models over 4,300 km of mains. It is one of thelargest dynamic all-mains models ever constructed. This paper discusses themodeling approach used by Stoner Associates and the relationships between thethree parties. Includes 4 references, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

01/01/1999

Number of Pages:

18