I have an incoming flow from my pond into an outflow control box (1) that has a weir wall (A) within, with a top set to 2-yr ws.
In Box (1), downstream of weir (A) is a 2nd weir wall (B), that has top set to 50-yr elev, and has an orifice opening on its lower elevation.
The 2-yr inflow...
The comparisons need be made from same control points and same pipe marks. If these physically change, then the measurement data is going to be different.
The control points need be outside the influence of whatever geo environment the pipe points are within. Can't have control points moving on...
