swazimatt
Civil/Environmental
- Aug 19, 2009
- 275
We are looking at discharging ww from a new development into an existing ww network. The council will be running some WW models and I suspect there may be very little peak flow capacity in the network, but quite likely some off-peak capacity in the network. In which case I would like to be able to measure the flow in the network at the pinch-point of the WSP model (I suspect this will be a 225 or 300mm dia pipe) and when the flow in the network drops below a certain flow rate we will start pumping ww into the network.
I would like to know the easiest way of measuring the flow in the existing network with the access being in a standard (live) WW manhole.
I would imagine the flows we would be measuring will be about 100 l/s and lower. This is approximately the capacity of a 300mm pipe
I suppose if we used an ultrasonic sensor to measure the depth of flow in the channel through the manhole we would be able to work out flow, not sure how accurate this would be with flowing liquid (i only have experience of these for measuring wetwell levels)
I would like to know the easiest way of measuring the flow in the existing network with the access being in a standard (live) WW manhole.
I would imagine the flows we would be measuring will be about 100 l/s and lower. This is approximately the capacity of a 300mm pipe
I suppose if we used an ultrasonic sensor to measure the depth of flow in the channel through the manhole we would be able to work out flow, not sure how accurate this would be with flowing liquid (i only have experience of these for measuring wetwell levels)