English

# Wetted Perimeter of a Trapezoidal Channel Calculator

Wetted perimeter is the perimeter of the cross sectional area of a hydraulic pipe that is wet. When a channel is much wider compared to its depth, then the wetted perimeter is approximately equal to that of the channel width. A trapezoid shape is mostly used for manmade channels and the cross section of natural stream channels. Here is an online mechanical calculator to calculate the wetted perimeter of a trapezoidal hydraulic pipe channel.

## Wetted Perimeter Trapezoidal Channel

easylength
easylength
easylength
length

Wetted perimeter is the perimeter of the cross sectional area of a hydraulic pipe that is wet. When a channel is much wider compared to its depth, then the wetted perimeter is approximately equal to that of the channel width. A trapezoid shape is mostly used for manmade channels and the cross section of natural stream channels. Here is an online mechanical calculator to calculate the wetted perimeter of a trapezoidal hydraulic pipe channel.

#### Formula:

p = b + 2 * ( ( ( t - b ) / 2 )2 + h2 )1 / 2
Where, p = Wetted Perimeter of Trapezoidal Channel b = Bottom Width h = Liquid Depth T = Width of the Liquid Surface

#### Example

A trapezoidal channel with bottom width 10m, liquid depth 8 m and liquid surface width 15 m will have wetted perimeter of
= 10 + 2 ( ( ( 15 - 10 ) / 2 )Â² + 8Â² ) 1 / 2
=26.7631 m