Open Channel Flow Monitoring
Open Channel Flow Monitoring
(OP)
I have a Cal Trans owned Trap Channel that drains into my project site. The trap channel is continuously conveying nuisance water. Are there any insitu methods of determining the flow rate of said nuisance water? My employer does not want to spend money, so ultrasonic level transducers are out and I can not install weirs as Cal Trans will not approve. Any ideas? I thought possibly installing a 2 x 4 square frame the width of the channel. Measure time to fill box. It won't be the most accurate but I only need an idea, not exact measurements and I could be in and out no need to get Cal Trans involved. lol





RE: Open Channel Flow Monitoring
As far as the flow rate that would be dependent upon the size of storm and intensity would it not?
Regarding the box idea, I suppose if you wanted to run out to the site every time it rains. Then when it fills up that first time the test is over until you drain it.
CalTrans should have as-builts that might give you an idea how much area is draining.
RE: Open Channel Flow Monitoring
RE: Open Channel Flow Monitoring
I recommend using Manning's equation with two surveyed Xsecs and high water marks. You can approximate the Sf by the slope of the high water marks and average the conveyance and back calculate the flow rate.
RE: Open Channel Flow Monitoring
RE: Open Channel Flow Monitoring
RE: Open Channel Flow Monitoring
RE: Open Channel Flow Monitoring
RE: Open Channel Flow Monitoring
RE: Open Channel Flow Monitoring