EPANet

[bank]

There is probably a simple answer to this, but I haven't figured it out. I have had flow tests done on a dead-end water main, gotten residual and static head, and flows. My plan is to extend this main another 1500 feet to provide water for a new facility. I need to determine if the pressure in the line at the far end is adequate.

Can someone tell me how I would input the flow test results into EPANet to provide a source for the system I am designing. I tried using a tank and pump to simulate the condition at the source, but the results were not believable. I need help. Thanks in advance.

 

[RWF7437]

If this is, and will remain, a dead end main you don't need EPANet. It is a very long dead end so you may want to consider looping it, if possible. If that's not possible, oversize it and provide a way to periodically flush this line or it will be a water quality headache for someone for years to come.

Good Luck

 

[cr1973]

Just figure the pipe losses at fireflow for the 1500 feet... simple enough.

 

[hydrae]

I assume it is just the dead end you want to model,
your source needs to match the existing dead end before you add your extension. this is calibrating the model.
it is best matched by matching the types of equipment currently supplying the dead end, then adjusting the items to make them equivelent.
e.g. you have a tank on a hill with a large network of pipes between the tank and dead end line, the large network can be a large pipe to replace many small pipes followed by the dead end pipe, adjust the size and length of the large pipe to match static and residual pressures in current conditions.
now add you extension.
Hydrae

 

[cr1973]

It will take 10 times longer to slap together an EPAnet model than to run a simple headloss calculation.

 

[queque]

Regarding Bank,
I have no experience in designing water distribution systems.
However, I have interrogated several computer models such as Haestad Methods, to gain insight into the design process. They are very intuitive but does not provide an increase in experience. A true system design demands expertise that a novice like myself does not have. The computer models permit insight and allows the generation of questions with more substance.

 

[bank]

I appreciate the responses thus far. It's true that obtaining results was easier doing simple head loss calculations; we did that. My client, however, specified that all information on the project be modeled/documented using EPANet, to conform with other sections of the project. Personally, I have no experience with EPANet, and found their explanation of how to handle my situation ambiguous at best. We got it done though, and the matter is now closed. Thanks agein for the assistance.