Removing and replacing paved surfaces

Effects of adaptation measures on water quality
Adaptation measure	Positive effects	Potential negative effects
Replacing pavement with greenery Small façade gardens	Rainwater purification upon infiltration Fewer sewer overflows Decrease in air temperature	Greenery can be a source of nutrients

Replacing paved surfaces with permeable pavement

Effects of adaptation measures on water quality
Adaptation measure	Positive effects	Potential negative effects
Water-permeable pavement Grass pavers Water storing foundations	Fewer sewer overflows Decrease in air temperature

Effects of adaptation measures on water quality
Adaptation measure	Positive effects	Potential negative effects
Bioswale Infiltration field or zone Rain garden	Fewer sewer overflows Decrease in air temperature	Pathogens may be present (particularly in bioswales)