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.
Reviewed in 2018