Subsurface Drainage

Drainage and filtration

          Usually, the drainage and filtration used on projects such as the field or slope. The filtration geotextiles are used in the following drainage applications. In these applications, the geotextile should be designed to survive construction, allow the passage of water at high rates, and retain insitu soil without clogging.Installation:

          The filtration geotextile is used on the bottom to stop mud and such from clogging up the perforated pipe. Then gravel goes down for drainage, then the pipe, another layer of gravel and finally filtration geotextile cover everything.  

Reference:

1.    web site geosynthetics

2.    kandthouse.blogsport.com