Environmental Engineering Reference
In-Depth Information
Table 4-2 (
Continued
)
Minimum Maintenance/Minimum Disturbance
• Defined disturbance zones?
• Protect sensitive areas?
• Sustain natural drainage?
• Minimize earthwork, cut and fill?
• Include reforestation, revegetation?
• Minimize soil compaction?
Impervious Coverage Reduced, Minimized
• Reduced road width?
• Reduced cul-de-sac diameter, open center?
• Reduced parking requirements?
• Reduced parking area size?
• Shared parking considered?
• Use of porous pavements, infiltration beds?
• Design single sidewalks, use porous pavements?
Disconnected, Distributed, Decentralized
• Disconnect roof downspouts from impervious surfaces?
• Utilize rain barrels, rain gardens?
• Design stormwater conveyance elements that infiltrate?
Source Control
• Street sweeping required?
• Lawn chemical application avoided, minimized?
• Irrigation only with captured runoff?
Step 7
. LID Site Concept Plan (Sketch Plan)
Step 8
. Engineering Design/Structural LID Measure Selection
Design Selection
• Runoff quantity needs?
• Runoff quality needs?
• Conveyance minimized?
• Impervious footprints minimized?
• Soil infiltration opportunities, capacity?
• Infiltration constraints?
• Construction cost comparison?
• Maintenance cost comparison?
• Ease of construction?
• Aesthetic benefit?
• Environmental benefit?
• Maintenance possible by tenant, owner?
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