Estimating water intake from a canal
Estimating water intake from a canal
(OP)
We are designing a water intake from a canal and need to estimate discharge. One suggestion is to have a manifold installed above the bottom of the canal such that intake pipe is parallel to water flow before it bends and connect to the lateral. Then water velocity inside the pipe can be estimated by relating the canal velocity (which is known) to pipe velocity.
Second suggestion to only install a lateral pipe perpendicular to canal flow and then estimate the flow by the water level in the canal (which is also known).
Which one makes sense.
Second suggestion to only install a lateral pipe perpendicular to canal flow and then estimate the flow by the water level in the canal (which is also known).
Which one makes sense.





RE: Estimating water intake from a canal
Mike Lambert
RE: Estimating water intake from a canal
RE: Estimating water intake from a canal
RE: Estimating water intake from a canal
http://www.usbr.gov/pmts/hydraulics_lab/pubs/wmm/c...
RE: Estimating water intake from a canal
RE: Estimating water intake from a canal
I've use electronic height gauges above the flume to get a continuous flow readout that can be connected to a recording device, etc.
RE: Estimating water intake from a canal
http://www.usbr.gov/pmts/hydraulics_lab/pubs/wmm/
The most common irrigation turnout I have seen is the constant head orifice (Chapter 9-10 in USBR Water Measurement Manual). This provides control and measurment. However other options (partial flume, weirs, ramped flume, other flow meter) need to be considered based on flow measurment accuracy required, control required, debris in the canal, and of course cost.
I've come across the Rubicon slip flow meter for irrigation turnouts but I have no experience with it and I think it may be costly. See details at the followin link:
http://www.rubicon.com.au/EN/products/slipmeter.ht...