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The Wetted Perimeter of Channel refers to the surface of the channel bottom and sides in direct contact with the aqueous body. It is a crucial parameter in hydraulic engineering for determining flow characteristics and channel efficiency.
The calculator uses the formula:
Where:
Explanation: This formula calculates the wetted perimeter based on the discharge in a regime channel, where the channel is transporting water and sediment in equilibrium.
Details: Accurate calculation of wetted perimeter is essential for designing efficient hydraulic channels, predicting flow behavior, and ensuring proper sediment transport in regime channels.
Tips: Enter discharge value in cubic meters per second (m³/s). The value must be greater than zero for valid calculation.
Q1: What is a regime channel?
A: A regime channel is a stream channel that transports water and sediment in equilibrium, meaning there is neither scour of the channel bed nor deposition of sediment.
Q2: Why is the square root function used in this formula?
A: The square root function models the relationship between discharge and wetted perimeter in regime channels, where perimeter increases proportionally to the square root of discharge.
Q3: What are typical values for wetted perimeter?
A: Wetted perimeter values vary widely depending on channel size and discharge, ranging from a few meters for small channels to hundreds of meters for large rivers.
Q4: Are there limitations to this formula?
A: This formula provides an estimate for regime channels and may not be accurate for channels with irregular shapes, varying roughness, or non-equilibrium conditions.
Q5: How does wetted perimeter affect flow efficiency?
A: A smaller wetted perimeter relative to cross-sectional area generally indicates a more efficient channel with less friction loss and higher flow capacity.