`i = ( h_2 - h_1 )/ "L" `

Enter a value for all fields

The Hydraulic Gradient calculator compute the gradient between to hydraulic heads based on their heights and the flow path length.

INSTRUCTIONS: Choose units and enter the following:

• (h₂) This is the height of the second hydraulic head.
• (h₁) This is the height of the first hydraulic head.
• (L) This is the length of the flow path between the two heads.

Hydraulic Gradient (HG): The calculator returns the gradient.

The Math / Science

The formula for the Hydraulic Gradient is:

HG  = (h₂- h₁)/L

where

• HG is the hydraulic gradient
• h2 is the height of the second hydraulic head
• h1 is the height of the first hydraulic head
• L is the length of the flow path between them.

A hydraulic gradient is useful in hydraulic formulas  (e.g. Gauckler-Manning Equation) for flow analysis.