Dewatering drainage makes it possible to lower ground water levels in such a short time that the groundwork for sewering, building excavations, cables and pipes can be done in the dry, without any risks in a short space of time.

It is achieved by special designed trenching machine systems to drain the ground water from the soil. Pumping out the ground water lowers the water table and  modifies the subsurface flow pattern. The system can be installed accurately by means of laser depth control.

 For certain soil profiles, dewatering drainage is the best drainage system.

This is especially the case for terrains with a porous surface layer and an impermeable underground. Thanks to the application of dewatering drainage in terrains that are prone to setting, the setting will take place more quickly.

Because of this, the great amounts of sand that are normally needed as a preparatory load will not have to be used and the period needed for setting will be drastically reduced.

This means there is no free water and the larger pores are filled with oxygen. The soil will feel moist and the conditions are ideal for plant growth. If the larger pores are also filled with water and the soil can't take up any more water we talk about Saturation.

Normally this will happen for a short time until the water in the larger pores has drained by gravity to a fluctuating water table.

Above the water table we will have a capillary fringe after water has freely drained away. Salt stored in the soil will mix with the water and rise with the water table and pull into the capillary fringe.

If the process of adding water continues the roots will end up in this capillary fringe or worse in the water table.