Sorry, but I still don't understand.
The flow from the flow control manhole will most likely infiltrate into Basin "A" and never reach the downstream pond. Is there anyway to create a reach that has the same characteristics as Basin "A" to accuratly replicate what will happen with the runoff...
I am working on a project where a previous phases pond's outflow is controlled by a flow control manhole, which outlets into an existing basin. I am now designing a new pond further downstream and need to account for the runoff of the existing basin upstream as well as the flow that is released...
Is there a way to place drywells as an outflow structure of a pond? Here we are required to place the rim of drywells 0.5' above the bottom of pond elevation.