Drainage structure
The drainage structure is a shaft in which a drainage ends. Technical components are gate valves, throttle devices and damming devices.
Drainage structures as components of retention soil filter systems have the following functions:
- Control of the filter drain
- Temporary blockage of the filter
- Flow regulation by limiting the filter speed or the filter throughput
- Avoidance of permanent backwater from the receiving water
A sampling option must be provided for the quality control of the process.
In the drainage area to the receiving water, the greatest possible physical re-ventilation of the throttle drain should be aimed for.
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- Ministry for the Environment and Nature Conservation, Agriculture and Consumer Protection (MUNLV) of the State of North Rhine-Westphalia (Hrsg.): Retentionsbodenfilter. Handbook for planning, construction and operation. , 1st edition, Düsseldorf 2003