Could you comment on the use of submerged Doppler sensors as flows in a pipe change from open-channel flow conditions to full, surcharged pipes?
The transition occurs transparently. What I mean by this is that as the level increases and goes into surcharge, the data logger (which is programmed with the channel dimensions) realizes that the pipe is now full and the flow calculation holds the wetted area to that of full pipe even though the depth measurement can and often will continue to read increasing depth as the surcharge depth increases above pipe invert.
Could you comment on the use of submerged Doppler sensors as flows in a pipe change from open-channel flow conditions to full, surcharged pipes?