Vortex Flow Control Optimizing Storage Efficiency Underground Stormwater Storage and Treatment Workshop Phillip Taylor Stormwater Solutions Specialist.

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Presentation transcript:

Vortex Flow Control Optimizing Storage Efficiency Underground Stormwater Storage and Treatment Workshop Phillip Taylor Stormwater Solutions Specialist Hydro International 03/04/2014

Sizing Assumption Site size 1 ac Pre-development C = 0.34 Post Development C = 0.99 Rational Method 1” Rainfall 60 minute duration

Pre-Development Condition C = 0.34 Runoff Rate = 0.34 cfs

Post Development Condition C = 0.99 Runoff Rate = 1.0 cfs

Outlet Control Condition Must Attenuate 1 cfs inflow to 0.34 cfs outflow

Require Underground Storage

Three-inch Orifice Flow Control

Size SC-310 Chamber Field (3” Outlet) af / af = 79% Efficient Max Release Allow: 0.34 cfs

Re-size SC-310 for Efficiency (3” Outlet) af / af = 96% Efficient

Construction Summary SC-310 Chambers sized for max efficiency Quantity (Labor) Stone (cy.) Excavation (cy.) Footprint (sq.ft.) SC in Orifice

Deeper Storage SC-740 Chambers

SC 740 with 2.8” Outlet af / af = 87% Efficient

Construction Savings Quantity (Labor) Stone (cy.) Excavation (cy.) Footprint (sq.ft.) SC in Orifice SC in Orifice Savings55%17%3%35%

Hydro 5” Reg-U-Flo Valve “S” Type“C” Type Flow control for stormwater detention Catch basin inlet flow control Erosion control and energy dissipation Aeration of stormwater storage discharges Pre-development hydrograph matching

Different Discharge Curve Head (ft) Flow (cfs)

5-inch RUF Valve and SC % Efficient!

Construction Savings Quantity (Labor) Stone (cy.) Excavation (cy.) Footprint (sq.ft.) SC in Orifice SC in Orifice Savings55%17%3%35% SC in Vortex Savings20%18%19%

Reg-U-Flo ® Optimum Flush Flo TM Kick-Flo ® Head Flow