Open Channel Velocity Profiling 
part 5 of 13

Profiling Checks 

For best possible results, you should: 

bulletCheck the inside diameter of the conduit.  Also, measure the horizontal and vertical diameters.  If there is a difference, then average the diameters.
bulletCheck for symmetry of flow.
bulletCheck level several times during the procedure.
bulletCheck the invert for rocks, sediment, and other debris.

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