BGI+ and BGI-U profiles published in the draft version

AMAREX is investigating decentralized rainwater management systems (BGI) as a solution to combat the negative effects of climate change, such as heavy rainfall, heat, and drought. However, since established RWMS are only effective to a limited extent, it is necessary to improve their functionality and adapt them to extreme weather events such as heavy rainfall and drought. To this end, comprehensive system analyses of RWBA were carried out across all fields of action, and the technical and functional expandability of various types of infiltration systems, green roofs, cisterns, and tree locations to adapted systems was developed and defined:

• BGI+ (RWB+) systems are functionally adapted to flood prevention requirements. Compared to the standard version (RWB), they usually have an expanded or enlarged volume for short-term retention, allowing heavy rainfall runoff to be temporarily stored relatively quickly. RWB+ systems are emptied again as planned within a short period of a few hours after a heavy rainfall event.
• BGI-U (RWB-N) systems are adapted to the requirements of drought prevention by usually combining an RWB or BGI system with a cistern as a service water storage tank. The storage strategy of RWB-N systems is geared towards long-term storage with the longest possible supply of rainwater for irrigation purposes.

The two system concepts, BGI+ and BGI-U, were summarized in a catalog of measures in the form of profiles. The profiles consist of system sketches and descriptions of the following aspects and effects:

• System design, technical implementation, and mode of operation
• Design specifications and construction notes,
• Expansion options as RWB+ and RWB-N systems
• Effects and impacts on heavy rain prevention (RWB+) and drought prevention (RWB-N)
• Limitations and restrictions of the systems
• Effects of RWB+ and RWB-N systems on the local water balance
• Socio-economic evaluation of RWB+ and RWB-N systems

The profiles contain the functional adaptation to the BGI+ system on the left-hand side and to the BGI-U system on the right-hand side. The second page of the profile contains a compact presentation of the multi-criteria analysis from the field of action “Socio-economic evaluation.”

• AMAREX Catalogue BGI+ / BGI-U profiles

  (only in german)