INNOVATION IN wATER, wASTEwATER, AND STORmwATER NETwORkS
ghD Pty Ltd
water Master plans
Prince Frederick, maryland, united States
master plans for two water distribution systems in calvert county, md.,
analyzed the impact of projected growth on pipe criticality, fire flow, and service
reliability. Based on hydraulic modeling of current and future conditions, GHD
identified areas most vulnerable to water main breaks and recommended
improvements that would enable the county to maintain service and supply the
required fire flow.
GHD used WaterGemS to create hydraulic models from the county’s existing
water network GIS and customer water meter data. In an automated, single-step process, a criticality analysis determined the percent demand that would
be unserved during an outage for every pipe in the combined 50-mile network.
GHD predicted improvements to one system would reduce unserved demand
due to a water main break by half.
The Greater cairo Water company’s Hydraulic modeling department undertook
master planning to address network deficiencies and low water pressures in
a 4,000-kilometer network. pressures ranged from 0.5 to 1 bar and velocities
reached 6 meters per second at some locations. modeling separate areas
did not provide an accurate overview so the department combined models to
simulate the entire network.
greater Cairo water Company
cairo water network enhancements
WaterGemS simulated scenarios and alternatives for improvements, and the
Darwin Designer module optimized hydraulic performance. The $50 million
project reconfigured and expanded the network to 62,000 kilometers of pipe
and installed eight pump stations. Water pressures rose to 3 to 6 bars and
velocities fell to 3 meters per second. The network now serves a population
that grew from 4 to 6 million during the four-year project.