The adoption of geotextile is to prevent uneven dike base from sinking and washout. Its ability to separate two different kinds of soil layers can stabilize pressed soil layer and prevent them from deforming after unfrozen in wintertime. Material adoption has to follow the blue print, this standard or CECI.
Geotextiles are permeable fabrics which, when used in association with soil, have the ability to separate, filter, reinforce, protect, or drain.