Table 4.
Seven implementing scenarios of LID practices.
| LID practice | Installing site | Installing ratio (%) | Installing dimensions (m2) | Soil layer porosity (%) | Soil layer hydraulic conductivity (m/d) | Storage layer thickness/barrel height (mm) | Storage layer clogging factor (%) | Drain delay (hr) | Reference |
|---|---|---|---|---|---|---|---|---|---|
| IT | Roadside | 15 | 11,224 | 50 | 0.3. | 450 | 0 | n.a. | [22,59] |
| RBa | Building | 15 | 13,469 | n.a. | n.a. | 680 | n.a.b | 6 | [22,61] |
| PP | Parking lot and square | 15 | 6734 | 50 | 0.3 | 300 | 0 | n.a. | [22,24,60] |
| IT + RB | Roadside and Building | 15 + 15 | 11,224 + 13,469 | ||||||
| IT + PP | Roadside and Parking lot and Square | 15 + 15 | 11,224 + 6734 | ||||||
| PP + RB | Building and Parking lot and Square | 15 + 15 | 13,469 + 6734 | ||||||
| IT + PP + RB | Roadside and Building and Parking lot and Square | 15 + 15 +15 | 11,224 + 13,469 + 6734 |
a
One rain barrel with a volume of 208 L (height: 680 mm, diameter: 625 mm) is designed to collect runoff from 100 m2 of private building roof, and the drain delay time was set as 6 h according to technical manual [22].
b
n.a.: not applicable.