How can I use User data extensions to calculate the static pressure at every junction
Static pressure = initial elevation _ pipeline elevation
Which software are you using?
Pressure (static calculated) is automatically calculated by most of our software.
Watergem but what calculate is residual pressure which is the results of HGL-Pipeline elevation
How do you define "initial elevation"? what is the use of that pressure?
Static pressure is one that occurs when the system is under minimum water consumption or the system is closed, under such conditions the pressure will raise above normal working pressure. This occurs when a tank is filling the system / supplying water to the Network. According to this pressure pipe class are selected based on it according to our guidelines.
If there any comment on it please share with me
To get this you can:
1. Set all the demands to virtually zero, turn pumps off and put just a tiny demand downstream of PRVs so they will be active.
or
2. Export the elevations of each node to a spreadsheet and subtract the elevation from the nominal HGL in that pressure zone.
If these pressures are much different than the pressure on a normal day, you need to determine why.
There is usually very little difference between static pressure and normal operating pressures. When you consider the large surge allowance you should use when specifying pipes, the differences are negligible..
Answer Verified By: petro nyerere