Drainage slide rule

With a pocket-sized agricultural drainage calculator, you can:

• Compute the required pipe size for a given drainage area.

• Compute the acres drained for a given pipe size or grade.

• Estimate permissible flow velocities for any pipe size, based on grade.

• Compute flow rates for pipe sizes or grades.

Features

• Functionality for both corrugated and smooth-wall materials.

• Built-in roughness coefficients.

• Other design and look-up tables.

Order your slide rule

Contact drainage@umn.edu to order a drainage slide rule or request more information.