1. What is Wetted Perimeter?

Wetted Perimeter of Channel is defined as the surface of the channel bottom and sides in direct contact with the aqueous body. It is an important parameter in hydraulic engineering for calculating flow characteristics in open channels.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( p \) — Wetted Perimeter of Channel (m)
• \( A \) — Wetted Surface Area of Channel (m²)
• \( R_H \) — Hydraulic Radius of Channel (m)

Explanation: The wetted perimeter is calculated by dividing the wetted surface area by the hydraulic radius of the channel.

3. Importance of Wetted Perimeter Calculation

Details: Accurate calculation of wetted perimeter is crucial for determining flow resistance, calculating discharge rates, and designing efficient hydraulic systems in civil and environmental engineering applications.

4. Using the Calculator

Tips: Enter wetted surface area in square meters and hydraulic radius in meters. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between wetted perimeter and hydraulic radius?
A: Wetted perimeter is the total length of channel surface in contact with water, while hydraulic radius is the ratio of cross-sectional area to wetted perimeter.

Q2: How does wetted perimeter affect flow characteristics?
A: Larger wetted perimeter increases friction between water and channel surface, which reduces flow velocity and increases energy loss.

Q3: Can this formula be used for pipes?
A: Yes, the same formula applies to both open channels and closed conduits like pipes when they are partially full.

Q4: What are typical values for wetted perimeter?
A: Values vary widely depending on channel size and shape, ranging from centimeters for small laboratory channels to kilometers for large rivers.

Q5: How accurate is this calculation?
A: The calculation is mathematically exact when accurate measurements of area and hydraulic radius are provided.