Changes

Jump to navigation Jump to search
Line 67: Line 67:  
==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:==

Navigation menu