Low Impact Development Manual for Michigan - OSEH - University ...

BMP Fact Sheet Variations
• Rain barrels
Capture Reuse
Structures designed to intercept and store runoff from rooftops allow for its
reuse, reducing volume and overall water quality impairment. Stormwater
is contained in the structures and typically reused for irrigation or other
water needs.
Cistern at Fairlane Green shopping center, Allen Park, MI
Applications Stormwater Quantity Functions
Residential Yes Volume High
Commercial Yes
Groundwater
Recharge
• Cisterns, both underground and
above ground
• Tanks
• Storage beneath a surface (using
manufactured products)
Key Design
Features
• Small storm events are captured
with most structures
• Provide overflow for large
storm events
• Discharge water before next
storm event
• Consider site topography,
placing structure up-gradient
in order to eliminate pumping
needs
Site Factors
• Water table to bedrock depth –
N/A (although must be considered
for subsurface systems)
• Soils – N/A
• Slope – N/A
• Potential hotspots – Yes with
treatment
• Max. drainage area – N/A
Benefits
• Provides supplemental water
supply
• Wide applicability
• Reduces potable water use
• Related cost savings and
environmental benefits
Limitations
• Manages only relatively small
storm events which requires
additional management and
use for the stored water.
LID Manual for Michigan – Chapter 7 Page 147
Low
Ultra Urban Yes Peak Rate Low*
Industrial Yes Stormwater Quality Functions
Retrofit Yes TSS Med
Highway/Road No TP Med
Recreational Yes
Cost
• Rain Barrel
• Cistern
• Manufactured porduct
NO3
Med
Temperature Med
Additional Considerations
Low
Med
Varies
Maintenance Med
Winter Performance Med
* Depends on site design