Design Calculators - Lateral Draingage System - Single Slope

• Unit Gradient method: Find the ultimate transmissivity when the impingement rate is considered to be equal to the permeability of the overlying soil. The Unit Gradient Method is recommended for designing landfill cover drainage.
  
  
• McEnroe and Giroud's method: Find the ultimate transmissivity based on McEnroe's and Giroud's equation. McEnroe or Giroud's Method can be used for designing landfill leachate collection layer and leakage detection layer.