I need to duplicate some pipelines and junctions in my model. The water leads connecting the waterlines to adjacent lots are only represented by one line when there should be two. Trying to input the correct demand (gpm) without just doubling the demand for one waterline. Want the graphs and data from the model to be accurate.
Thinking I may need to just individually draw new waterlines, but is it possible to just double the demand on the waterline and double the diameter of the water leads and get the same effect/the correct data? Or is there another method that would be better? Also, considering using model builder again to insert the waterlines that need to be duplicated (with a different name) so that there is automatically two of the same line.
Curious if there is a better way.
Hello Hannah,
So do you have two separate demands at two locations? Or are these individual customers off of the same pipe?
The same pipe feeds to separate customers, one solution may be to try using customer meters. You can tie the customer meters to a pipe with a tap and lateral. More information can be found here: Customer Meter Elements and the External Customer Meter Data Manager.
If you need to model these as individual junctions and pumps, you can add them to the model. Unless the end point is the same junction, using ModelBuilder may not be the best option. Even if it was, you will end up with two pipes directly on top of each of other in the drawing, which would make it difficult to differentiate.
It may be possible to model a pipe with an equivalent area (it would not be simply twice the diameter) and put two demands on a junction. You may want to check the pressure and headloss results if you do this to make sure the results in the model are accurate.
Regards,
Scott
Answer Verified By: Sushma Choure
Hey Scott, thank you for your help. Your comments on the diameter vs area, head loss and pressure were especially helpful. I had not considered those.
There are two separate demands for 2 adjacent lots (one for per lot), and the demand is the same for each connection/lot (0.6 GPM/connection.) The leads to adjacent lots were only modeled as one lead in ArcGIS for simplicity. Just needing to duplicate the pipe (specifically its length, material, end point elevations, and diameter) and move it 3 feet over along the waterline to model the second lead that is not shown.
This is for multiple subdivisions with a lot of connections/lots, so just trying to find the smartest route in accomplishing this task. Is there another route you would recommend? Would remodeling in ArcGIS be simpler?
Usually, in hydraulic models for design and operation, you don't include service lines to customers as pipes in the model. Most models just lump the demands at the junction nodes at the ends of each pipe (one pipe per city block). That is usually sufficient detail for most work.