Delayed discharge of rainwater
Buffering of rainwater and delayed discharges to sewer or Canal
In periods of abundant rainfall, floods might occur frequently. This is because more and more paved surfaces are being created (buildings, parking lots, driveways, etc).
To solve this problem, there are various infiltration systems, that make the water infiltrate slowly into the ground. These systems have many drawbacks…
Therefore, we have developed a system that is able to gather the rainwater. Then, the amount of water is gradually transferred to the sewer or stream.
The system consists of a tank with a floater and an airlift. The floater stimulates the airpump and activates the airlift. The airlift is able to pump an average of about 9 liters per minute.
To determine the buffering volume, there is one factor that the customer should decide. It is
impossible to create a buffering that works perfectly in every particular situation. Therefore, for periods of abundant rainfall, we have installed an overflow. The customer is free to choose, within how many years, an urgency overflow should be installed. This will determine the buffering volume.
Several studies come up with the same conclusions:
Privately: 10 l/m² peak rainfall(= 15 min) and 14 l/m² (within one hour)
For industries: 40 l/m² peak rainfall (= 15 minutes) and 56 l/m².(within one hour)
For industries our system is not applicable, because the roofs are much larger than 100 m².
We can offer the following systems:
Description Remaining volume Buffer volume
BT 2.400 1.200 1.200
BT 3.300 1.650 1.650
BT 6.000 3.000 3.000
Returning period of an overflow
½ year 1 year 5 year
Private 1 m³ 1,5 m³ 2,75 m³
Industrie 4 m³ 6 m³ 11 m³