Numerical Simulation of Pressure Transients in Water Supply Networks as Applicable to Critical Water Pipe Asset Management

Abstract

It is well known that internal water pressure, including pressure transients, in water supply networks is a major contributing factor in many pipe failures. Reliable prediction of pipe failures needs accurate information about critical contributing factors such as internal water pressure. This paper reports on a numerical study of transient pressure development following a pressure-monitoring program. Two large water supply network sections were considered, and pressure transient hydraulic models were developed using a relevant computer program. Extended-period simulations (EPSs) were conducted for each section to understand its steady-state operation during normal operation. The pressure transient models were validated using field pressure data, which were measured using high-speed pressure-monitoring equipment installed at selected locations in both network sections. A methodology is proposed to integrate the results of these simulations in a water utility asset management database to improve pipe failure prediction.