Head Due to Velocity of Approach in Notches and Weirs Formulas

The Head due to Velocity of Approach is considered as the elevation difference between the two circled points on the surface of the approach flow. And is denoted by h_a. Head Due to Velocity of Approach is usually measured using the Meter for Length. Note that the value of Head Due to Velocity of Approach is always negative.

Notches and Weirs formulas that make use of Head Due to Velocity of Approach

fxLength of Weir Considering Francis's formulaGo

fxLength of Weir Considering Bazin's formula with Velocity of ApproachGo

fxLength of Weir for Broad-Crested Weir with Velocity of ApproachGo

fxDischarge over Rectangle Weir for Bazin's formula with Velocity of ApproachGo

fxDischarge over Broad-Crested Weir with Velocity of ApproachGo

FAQ

What is the Head Due to Velocity of Approach?

The Head due to Velocity of Approach is considered as the elevation difference between the two circled points on the surface of the approach flow. Head Due to Velocity of Approach is usually measured using the Meter for Length. Note that the value of Head Due to Velocity of Approach is always negative.

Can the Head Due to Velocity of Approach be negative?

Yes, the Head Due to Velocity of Approach, measured in Length can be negative.

What unit is used to measure Head Due to Velocity of Approach?

Head Due to Velocity of Approach is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Head Due to Velocity of Approach can be measured.

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