Hi,
I have a model in which a pond goes to an outlet structure to go directly to our storm system. However, we want to discard the water quality volume from that same pond to go to arbitrary outfall so it does not affect downstream of our system. I know what the volume that I need to discard is.
Therefore, I was wondering if it would be as simple as having two outlet structures with pipe attached to each of them, one for the water quality volume and one for the rest of the flow? For the water quality volume the pipe after the outlet structure would end in an outfall.
How would I make sure that only the amount of XXX of volume is taken to that pipe?
Thanks
Jesse, after I have run the model that I did with the seepage method approach would I be graphing the flow(seepage loss)? Would that tell me how much flow was lost due to infiltration?
I looked at it and supposedly we are trying to get 3.5 cfs discarded and my model resulted in higest result of 1.3 cfs for the flow(seepage loss). Therefore, would it be best to mess with the soil information until I get my desired cfs or try the approach of discarding flow with another outlet from the pond with a rating table.
Should I also be looking at the seepage rate results? I looked at that and was getting 0 in/hr which does not seem right.
Thanks,
Paola Espinoza-Youn said:However, to get the desired infiltration rate. Is that something that I would see if I got the desired infiltration rate after I run the model or is that somewhere I can look someplace else before running it?
You would need to compute the model first and graph the pond seepage result field.
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Yes the Green-Ampt is the standard methodology which calculates the infiltration rate based on the Suction Head, Conductivity and Initial Deficit of the soil. If you click the name of the field you can see a description at the bottom of the Property Grid (plus they are documented in the Help). See: Where can I find the definition of a property?
I have added a few more details about these parameters to the new article, based on the EPA-SWMM manual.
Yes, if you graph the seepage result field, that will be the infiltration based on the parameters you set (flow lost to the system through soaking into the ground in the pond)
Nevermind i see that I answered my own question regarding if they are soil properties. I did not see that it explains what the parameters are underneath when you click on it.
However, to get the desired infiltration rate. Is that something that I would see if I got the desired infiltration rate after I run the model or is that somewhere I can look someplace else before running it?
Thanks for helping!
So the Gregg-Ampt Parameters are all soil properties, correct? That is what it seemed to be when I looked it up online. And then after I run the model, is that when I see what infiltration rate resulted from those soil Gregg-Ampt Parameters that I input.