Inlets on Grade
Inlets located on a grade (SL > 0) are characterized by an efficiency, E, for a given set of conditions:
Where:
E = Inlet efficiency (unitless)
Q = Total gutter flow (m3/sec, ft3/sec)
Qi = Intercepted flow (m3/sec, ft3/sec)
The flow that is not intercepted is called carryover or bypass flow. It is defined as follows:
Qb = Q - Qi
Where:
Qb = Bypass flow (m3/sec, ft3/sec)