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On-Site Storage Control

On-Site Storage Control. Rooftop storage Parking lot storage Underground storage. Commercial developments may have a percentage of impervious areas of 85% or more. On-site storage is often preferred to centralized storage for cost sharing, quality control and spill control. Methods include:-.

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On-Site Storage Control

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  1. On-Site Storage Control • Rooftop storage • Parking lot storage • Underground storage Commercial developments may have a percentage of impervious areas of 85% or more. On-site storage is often preferred to centralized storage for cost sharing, quality control and spill control. Methods include:-

  2. 1 2 3 Schematic of Commercial Site Buildingfootprint30% Parking and Roads65% Pervious5% Parking95% impervious Parking67% B Roof storage 75%total roof area Total Breadth B Roads33% B Roads90% impervious Roof structures Total Width W

  3. 1 2 3 Schematic of Commercial Site Buildingfootprint30% Parking and Roads65% Pervious5% Parking95% impervious Parking67% B Roof storage 75%total roof area Total Breadth B Roads33% B Roads90% impervious Roof structures Total Width W

  4. 1 2 3 0.72 1.95 Example of On Site control Imperv. 95%4.11 Roof3.00 Parking4.33 Pervious5%0.22 Totalarea10ha Parking &roads6.50 Imperv. 90%1.95 Roads2.17 Pervious10%0.22 Grass0.50 0.50 Part 3 pervious area Part 3 impervious area 73%imperv Part 3 total area 2.67

  5. Example of On Site control

  6. Roof areahectares 3.000 Store areahectares 2.250 Area/drainsq.metre 450.0 Drain flow L/min/25mm 24.000 Roof slopegH:1V 200.00 Model Rooftop storage

  7. Outflow from Rooftop

  8. Parking Lot storage 100.5 Inlet Control Device 100.0 99.0

  9. Wedge invert 100.00 Grade 1 g1H:1V 60.00 Grade2 g2H:1V 120.00 Angle subtended 90.00 Number of wedges 67.00 Define Wedge storage

  10. Outflow from Parking storage

  11. Parking lot storage (2) Volume Discharge Rim elevation Catch basin Invert level Rim capacity

  12. 0.889 0.492 Compare outflow with and without on-site storage

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