DESIGN OF LID SYSTEMS - Low Impact Development and Sustainable Stormwater Management - page 131

Table 7-1 LID Structural Measures
Design Concept Structural Measure Method

Volume reduction and
pollutant removal

Porous pavement with
infiltration bed

Infiltration

Infiltration basin Infiltration

Infiltration bed (grass) Infiltration

Infiltration swale, trench Infiltration

French drain, dry well Infiltration

Rain garden Bioremediation, Infiltration

Bioremediation bed Bioremediation

Vegetated filter strip Bioremediation

Vegetated swale Bioremediation

Planter box Bioremediation,

evapotranspiration

Constructed wetland Bioremediation,

evapotranspiration

Vegetated roof Evapotranspiration

Rooftop capture, storage Capture/potable use

Rooftop capture, storage Capture/nonpotable use

Site capture, storage
irrigation use

Pollutant removal only Manufactured systems Filtration

Sand filter Filtration

Wet pond Bioremediation

Rate mitigation only Detention basin (dry) Detention

Vegetated basin Detention, limited

bioremediation

Other Vegetation, soil restoration

7.3 PERVIOUS PAVEMENT WITH AN INFILTRATION
OR STORAGE BED

Pervious pavement consists of a permeable surface course underlain by a storage
reservoir consisting of a uniformly graded aggregate bed (Figure 7-1) or preman-
ufactured structural stormwater units. The bed is typically laid on uncompacted
soil to facilitate rainfall infiltration. The surface course may consist of pervious
bituminous asphalt, pervious concrete, various types of pervious pavers, or other
types of pervious structural materials [1, 2].

Types of Porous Pavement

Porous pavement wearing surfaces have been constructed of various materials,
intended for different types of service, from vehicle traffic (Figure 7-2) to pedes-
trian use (Figure 7-3):
• Pervious bituminous pavement
• Pervious concrete