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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Extreme events, natural variability and climate change : Approval of technical suds in germany
Approval of technical suds in germany
Water laws and regulations in Germany stipulate the use of stormwater infiltration systems. Decentralized SUDS
(sustainable drainage systems) offer a good alternative to traditional end of pipe treatment systems for stormwater runoff
from urban areas. Besides ¡°green¡± SUDS like grassed swales or rain gardens technical infiltration systems like plastic
boxes or arches in the underground get more and more important in the dense urban environments.
Choosing decentralized systems leads to several advantages like higher flood resilience, lengths of sewers can be
reduced and no additional space in the urban environment is required. But stormwater is very often highly polluted and
must be treated before infiltration. Proprietary stormwater treatment systems therefore can get an official general technical
approval in Germany to secure a proper function. The laboratory test procedures of the Deutsches Institut f¨¹r Bautechnik
(DIBt) take into account hydraulic behavior, removal of pollutants (total suspended solids (TSS), copper, zinc and
petroleum type hydrocarbons (TPH)) and maintenance. The tests are carried out using four different rain intensities that
represent the German rainfall bandwidth. Pollutants are added to a synthetical stormwater runoff and the tests represent
specific loads that are taken from a literature study. Some tests are carried out at filter columns or segments if the facilities
exceed a certain size. At this time 17 general technical approvals are issued. These are permeable pavements, linear filter
channels and filter shafts in front of underground infiltration facilities. In this paper the general requirements and the basics
for the tests are summarized.
Maintenance and operation of those facilities must be regulated and taken into account. Some technical approvals of the
DIBt require the completion of maintenance contracts. In compliance with the above-mentioned requirements for
hydraulics and pollutant removal a long-lasting operation can possibly be guaranteed.
File Size : 569,722 bytes
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Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Extreme events, natural variability and climate change
Date Published : 20/08/2015
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