Open Access
Table 1
Strategic use of different urban green coverage (UGC).
| UGC | Green open spaces | Trees | Green roofs | Vertical greening |
|---|---|---|---|---|
| Shades canyon surfaces? | Yes, if grass rather than concrete | Yes | Shades roof, not internal canyon surfaces | Yes |
| Shades people? | Yes, if treed | Yes | No, only very intensive green roofs | No |
| Increases solar reflectivity? | Yes, when grassed | Yes | Yes, if plants healthy | Yes |
| Evaporative cooling? | Yes, with water | Yes (Unless severe drought) | Yes, with water when hot | Yes, with water when hot |
| No, without water | No, without water | No, without water | ||
| Priority locations | • Wide streets with low buildings − both sides | • Wide streets, low buildings − both sides | • Sun exposed roofs | • Canyon walls with direct sunlight |
| • Wide streets with tall buildings − sunny side | • Wide streets, tall buildings − sunny side | • Poor insulated buildings | • Narrow or wide canyons where trees are unviable | |
| • Green open spaces | • Low, large buildings | |||
| • Dense areas with little available ground space |
Source: [13].
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