Hydraulics and Fluid Mechanics in ME
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)

C × √(m × i)
A × √(m × i)
mi × √(A × C)
AC × √(m × i)

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Hydraulics and Fluid Mechanics in ME
The total energy of a liquid particle in motion is equal to

Pressure energy - (kinetic energy + potential energy)
Kinetic energy - (pressure energy + potential energy)
Potential energy - (pressure energy + kinetic energy
Pressure energy + kinetic energy + potential energy

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