Question: Contractions are used in flow measuring devices with the changes in water depth indicating the flow rate. A simple device is a Venturi flume or

Contractions are used in flow measuring devices with the changes in water depth indicating the flow
rate. A simple device is a Venturi flume or a contracting section on a flat slope.
A rectangular section converges from a width of 3m to 2m and the water depth between the two
sections decreases from 1m to 0.9m. Neglect friction losses.
a) Calculate the flow rate.
b) Is this flow subcritical or supercritical before and within the contraction?
Contractions are used in flow measuring devices

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