OPEN CHANNEL PROFILING
SCOPE
This handbook contains the instructions on how to measure the velocity profile and calculate the
flow of open channels. The velocity profile is measured using a handheld velocity meter. Flow is
calculated with the continuity equation (Q = x A) where Q is flow, is mean velocity and A is
cross-sectional area.
Section I describes mean velocity, cross-sectional area, site selection, profiling and methods of
determining the mean velocity. Section II describes methods of calculating the instantaneous flow
rate. Section III is a case study with the MMI Model 2000 being used to determine .
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