Water tables

Benefits of WaterTable system:

The patented Trewatin WaterTable system is ideally suited for solving immediately occurring and/or anticipated flooding problems. The unique design and the use of prefabricated elements make the underground storage facility much quicker to build than comparable systems.

• Rapid buffering capacity at peak downpours
• Precast concrete
• Rapid realisation
• Modular
• Lifetime >120 years
• Fully circular
• High load capacity
• Man accessible
• Financially interesting, very low depreciation
• Also suitable for waste water storage

‍

WaterTable system: need and options

‍

Need for water buffering:

- Retaining water within municipal boundaries

- Sewers cannot cope with intensity of future showers

- Therefore: disconnect and buffer

- Infiltrate where possible

‍

Management and maintenance options

- Recess for manhole

- Filters between the walls

- Cleaning ditch / scrubpitch

- IT sewers under the facility

‍

Monitoring options

- Telemetry

- Reports

- Maintenance contract

‍

WaterTable system: Surface mounted

Load-bearing substrate

• 20 cm of mixed granulate
• 5 cm flat profiled sand bed

Reinforced foundation slabs

• 120x120x14 cm & 58x200x14 cm
• Reinforcement as a function of the requested load
• Options: on-site pouring or slabs of 200x200 cm

Water tables 200x200 cm

• Planting length adjustable according to infiltration needs and groundwater table
• From 75 cm to 275 cm adjustable by 25 cm
• Option: manhole / indentation hole dia 80 cm

Sidewalls

• Height as a function of height water tables and foundation plates
• 5 cm vertical recesses for infiltration requirement
• Adjustment plates with holes for the purpose of inflow and outflow

Infiltration mat

• Large-mesh mats made of recycled material for maximum infiltration area
• Option: EPDM foil: wrap with a waterproof foil to create a buffer basin

Geotextiles

• Permeable cloth along top and sides: protecting infiltration mats from soil

‍