Hi,
I'm not quite sure I understand from the pics which one is the diverted canal and which one is the continuing stream...
If your problem is that the canal is taking in too much gravel, you can use a vortex gravel trap; that is simply a diagonal slot across the canal's bed, to be located in a sector with more or less uniform flow, that will return some flow to the river, with most of the gravel and coarse sand load.
If the problem is gravel depositing around the intake, then I would probably try to install a judiciously-designed baffle upstream of the intake.
Cheers, Claudio
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Claudio Meier Ing., M.ASCE
Associate Professor of Civil Engineering
University of Memphis
Memphis TN
(901)678-3158
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Original Message:
Sent: 05-28-2018 18:18
From: Alan Shaw
Subject: Irrigation Diversion Structure - Gravel, Sediment Load Reduction
All,
I'm looking for some concepts to reduce the gravel, sediment load coming into this existing struct, see attachments. During this high water season and lower seasonal flows we are seeing tremendous bed loading coming down this mountain stream. As you can see the flow vectors are pushing the majority of material into the diversion channel.
Removing the main channel stop boards allowed all of the material to clear out before spring runoff. Stop boards were reinstalled and material filled back in over a 2-3 day period. Material plugs the sluice gate opening and we are having to clear it 2-3 times a day.
Any comments will be greatly appreciated.
Thanks,
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Alan Shaw P.E., M.ASCE
(406) 223-6223
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