H&H Study Question
H&H Study Question
(OP)
I have a project where I am analyzing a neighborhood for a 100 yr storm event. The current design drains each street into a canal. When the canal rises above the outfall culverts, valves close and the ditches are alowed to backwater until they spill over into a ditch on the far upstream end of the ditches. This ditch then drains into a retention pond where it is pumped into the canal. The site is flat and the current ditches are at slopes of 0.25% to flat.
I need to model the above scenario, but can not come up with a reasonable means of analysis. I need to take advantage of the flow that gravity drains into the canal because the sit can not drain a 100 yr flow into the pond without flooding (which is one reason for the study). I know improvements have to be made, but have to justify them via some means of analysis....
I need to model the above scenario, but can not come up with a reasonable means of analysis. I need to take advantage of the flow that gravity drains into the canal because the sit can not drain a 100 yr flow into the pond without flooding (which is one reason for the study). I know improvements have to be made, but have to justify them via some means of analysis....





RE: H&H Study Question
RE: H&H Study Question
Thanks for the reply. Thats how I began modeling the project, but my issue is with modeling the valves so that the outflow into the canal stops once the canal is higher than the culvert (valve closed). I am using Hydrocad to do the modeling.
RE: H&H Study Question
As to your modeling question, since i am a bit old school I would create rating curves reflecting the stage storage and discharge which including the zero discharge for when the shutoff valve is off.
RE: H&H Study Question
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: H&H Study Question