It is necessary to define the length and diameter for pipes as well as a coefficient to estimate the headloss occurring when the water is flowing through. The network model we are creating is going to use the Hazen-Williams equation to estimate the headloss. Independently of the headloss equation used, pipe lengths and diameters are two properties that are available in practically every hydraulic network model. The following table summarizes the property values to be utilized for each pipe including Hazen-William coefficient (H-W).
|Pipe ID||Length(m)||Diameter (m)||H-W Coefficient|
In EPANET, pipe properties of a hydraulic model (length, diameter, roughness, etc.) can be set from a property grid. You may open the property grid by double-clicking on any desired pipe in the drawing space and view the current properties of the selected pipe. Alternatively, you might select the desired pipe ID from the data browser window to view its properties. Choose “Pipes” then a pipe ID from the Data browser window to open the “Pipe Property” editor (see figure below).