Changes

==Decide if an underdrain will be included==

==Decide if an underdrain will be included==

* Step 1: Based on the median infiltration rate of the native soil at 1.5 to 3 metres depth below the practice location, or interpolation from the median grain-size distribution results, decide if an underdrain will be included in the design.<br>

* Step 1: Based on the median infiltration rate of the native soil at 1.5 to 3 metres depth below the practice location, or interpolation from the median grain-size distribution results, decide if an underdrain will be included in the design.<br>

If the median field infiltration rate of the underlying native soil is less than 15 mm/h, include an underdrain.

If the field estimated infiltration rate of the underlying native soil is less than 15 mm/h, include an underdrain.

==Select a surface ponding depth to begin sizing with:==

==Select a surface ponding depth to begin sizing with:==