Report Number: 4
Year: 1978

The Analysis of Small Water Distribution Systems

A method is derived from determining the flow lost per foot of pipe in situations involving pipes having leaks or illegal connections. The flow into the pipe and the pressure drop over the length of the pipe must be known. An example problem is solved. A modification of the Hardy-Cross technique of pipe network analysis is presented which accounts for flow out of the network per foot of pipe. This modification can be used to account for unintentional loss as well as outflow to consumers in situations where an accurate description of the flow is required. This situation is most likely to arise in small distribution systems where the outflow to each consumer may be a significant part of the total flow in a pipe. Two example problems are solved, the second [of which] involves an expansion of the network considered in the first.

Stephen J. Winter
Chung K. Liu