Drainage discharge is calculated using the formula: Discharge = Area x Velocity. This formula means you multiply the cross-sectional area of the flow by the average velocity of the flow.
Here's a breakdown:
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Discharge (Q): The volume of water flowing past a point per unit of time. Common units are cubic meters per second (m3/s) or cubic feet per second (ft3/s).
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Area (A): The cross-sectional area of the water flowing in the channel or pipe. This is the area of the water perpendicular to the direction of flow. Common units are square meters (m2) or square feet (ft2).
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Velocity (V): The average speed of the water flow. Common units are meters per second (m/s) or feet per second (ft/s).
Therefore, the formula for calculating discharge is:
Q = A x V
