Permeable paving systems are known as surfaces that are able to absorb storm water and thus, minimize the surface water runoff. Different systems of permeable pavement surfaces exist. They are commonly installed on car parks, residential streets or sidewalks.

- Permeable pavers consist of concrete bricks with gaps or funnels between the single bricks

- a variety of single rocks create the permeable paver surface - Gaps and funnels between bricks are commonly filled with stone and sand or grass (vegetated grid pavers are further explained in 5.4.2)

- Concrete bricks are located on stone layer

- Bricks are not pervious! (gaps/funnels allows water infiltration)

- After storm water event: water trickles/infiltrates through gaps/funnels between bricks

- Water is temporary stored in underlying stone layer and infiltrates into the soil or to an additional drainage layer conveys water into sewage system (subsurface drain)

- Water uptake by plants (if plants established in funnels between concrete bricks) - Application area: parking lots, sidewalks, bike paths, driveways, streets…

- Function:

o reduced surface/storm water runoff

o water filtering -> reduced amount of pollutants

o delayed runoff

Basic information

Type: 
Retrofitting + Creation

Performance

Evapotranspiration none none
Shading none none
Reflection (Albedo) none
Water Conveyance none
Water Infiltration 1
Water Retention 1
Water Storage none
Water Reuse none
Water Filtering 1
Water Bio-remediation none
Deposition none
Bio-filtration none
Habitat Provision none
Connectivity none
Beauty / Appearance none
Usability / Functionality 1
Social Interaction 1
Role of Nature / Mode of Action: 
- Imitating natural soils  natural soils are permeable - Natural drainage effect of soils - different permeability of soils depending on the soil type and the saturation with water - different infiltration potential - soil with large pores absorbs bigger amount of water compared to sealed surfaces - filling material between bricks enables water infiltration on high level
Technical & Design Parameters: 
- Single bricks create surface paver - Relatively simple construction: bricks; underlying gravel layer; drainage layer; filling material - Filling material: little stones or sand - Maintenance necessary
Conditions for Implementation: 
- Implementation on new or existing building sites - Prior analysis of the soil is necessary
Benefits & Limitations: 
Benefits: - Water quality protection - Storm water management - reduced surface runoff - controlled infiltration - temporary water storage - water filtering Limitations /disservices - limited load on paved area

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