Underground systems below public open spaces (sport fields) composed of modular elements to retain flash floods and to store water for irrigation purposes nearby.

Basic information

Type: 
Retrofitting + Creation

Performance

Evapotranspiration none none
Shading none none
Reflection (Albedo) none
Water Conveyance none
Water Infiltration none
Water Retention 1
Water Storage 1
Water Reuse 2
Water Filtering 1
Water Bio-remediation none
Deposition none
Bio-filtration none
Habitat Provision 1
Connectivity 1
Beauty / Appearance none
Usability / Functionality none
Social Interaction none
Role of Nature / Mode of Action: 
Depending on the Geology of an area underground storage capacity retains and stores water after flash floods. Examples from Peru show that already in Pre – Inca time, people made use of these qualities and directed water in channels to storage areas or in order to feed artificial ponds or springs. “Amunas, or ancient diversion channels, in select upper reaches of Lima’s watersheds historically conveyed stream flows to infiltration ditches constructed laterally across mountainsides. Infiltrated water would re-emerge in small, constructed micro-pools or in natural springs downslope, over several weeks or months of lag time.” (Gammi & De Bievre 2015).
Conditions for Implementation: 
Space for underground storage needs to be excavated
Benefits & Limitations: 
Benefits - On site storage of water helps minimizing /delay run-off - Re-use of water on site => irrigation during hot season => more climate active vegetation Limitations - Minimum water quality needed for storage - Space for underground storage required

This project has received funding from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 730052 Topic: SCC-2-2016-2017: Smart Cities and Communities Nature based solutions