Hydraulics and Fluid Mechanics in ME
The discharge through a channel of trapezoidal section is maximum when

The sloping side is equal to the width at the bottom
The sloping side is equal to half the width at the top
Depth of channel is equal to the width at the bottom
Width of channel at the top is equal to twice the width at the bottom

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Hydraulics and Fluid Mechanics in ME
Two dimensional flows occurs when

The velocity of successive fluid particles, at any point, is the same at successive periods of time
The direction and magnitude of the velocity at all points are identical
The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane
The magnitude and direction of the velocity do not change from point to point in the fluid

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