Infiltration capacity of the soil
The permeability coefficient (kf -value) is a measure for the water permeability of the soil. A permeability coefficient should be between 10-3 and 10-6 m/s to ensure that the infiltration system functions properly. This value is normally determined in a soil survey.
- To prevent the soil from washing up, it is covered with a layer of gravel. A measuring rod is driven into the ground. A mark is made on the measuring rod 10 cm above the bottom of the pit.
- Now fill the pit with water and pre-water it for 1-2 hours by refilling it regularly (garden hose).
- Now fill in water up to the mark. After 10 minutes, use a measuring bucket to top up with as much water as is necessary to raise the water level back up to the mark. The permeability of the soil can be estimated from the amount of water refilled.
- Repeat this step as often as necessary (at least 3 times) until a constant value is obtained.
- Evaluation of water quantity:
- < 1.5 liters in 10 minutes - hardly any infiltration possible (silt )
- = 1.5 liters in 10 minutes - infiltration possible (silty sand)
- > 3 liters in 10 minutes - infiltration well possible (sand, gravel)
Required number of two-shell plastic tanks ET-2000-2
< 3 m³ | < 6 m³ | < 9 m³ | etc. | |
two-shell plastic tank | 1 piece | 2 piece | 3 piece |
Note: Approx. 3 m³ storage volume can be calculated for each tank when installed. This consists of 2 m³ tank volume and 1 m³ storage volume of the fill level. The storage volume of the fill level results from 4.15 m³ fill level with approx. 25 % pore volume to approx. 1 m³.
Required number of DRAINMAX tunnels
<2,2 m³ | <4,4 m³ | <6,6 m³ | etc. | |
DRAINMAX tunnel | 1 piece | 2 piece | 3 piece |
Note: Approx. 2.2 m³ storage volume can be calculated for each DRAINMAX tunnel when installed. This consists of 1.6 m³ tunnel volume and 0.6 m³ storage volume of the fill level. The storage volume of the fill level results from 2.4 m³ fill level with approx. 25 % pore volume to approx. 0.6 m³.
Free service calculation and offer
Send us the details of your sealed areas, the information on the infiltration capacity of the soil and your location. Using our Rainplaner software, we will determine an exact calculation of your required infiltration trench based on the current rainfall data and your information and make you an offer.