Right, the pond is really large - more than is needed for the incoming flow. The designer is proposing turning a portion of it into a bioretention to treat 80% of the inflow - so NO SERIES - the rest would bypass the bioretention and they'd both join in the remainder of the pond before flowing...
No the second pond is just a dry detention pond - It's a large existing dry detention pond and they are converting a portion of it to bioretention - the argument being that 80% of the runoff flowing into the pond will go directly into the bioretention facility and then join with the other 20% in...
So if you are proposing a design that treats water in a separate pond and then discharges into a larger pond so that that water mixes with untreated water before it all discharges to the outfall - how do you treat the lbs/removed for total phosphorous and nitrogen? Is it the same straight...
