flood-con (innovative stormwater management)
Post on 12-Jan-2017
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Jon E. Rasmussen, P.E., CPESC, LEED AP BD+C
What is the most typical way to attenuate storm water runoff today?
Static Control Structure
Description/Capabilities:• Fixed opening;• Attenuate the peak flow rate;• Discharge is proportional to depth of water;• Attenuate single or multiple design storms;• Discharge by reservoir routing equations.
Limitations:• Do not control the volume of runoff;• Naturally delay basin peak time;• Discharge higher flow rates during the trailing end
of the storm;• Can contribute to downstream erosion;
Static Control Structure
So what is Flood-Con?1. Patented automated flood control
device;2. Composed of a rain gauge, depth
sensor and uses program logic to emulate (re-create) pre-developed storm water runoff from a site development.
Description/Capabilities:• Provides downstream channel protection by replicating the
natural pre-developed flow rate;• Attenuates actual storm events in real time for any rain event; • Prevents downstream flooding resulting from delayed peak flow
time;• Replicates pre-developed developed peak flow time(s);• Variable orifice openings;• Follows the pre-developed hydrograph;• Discharge is independent of depth of water;
FLOOD-CON
Pre-Development DataDrainage area: 16.1 acresCN = 59Tc = 22.8 min.
Post Development DataDrainage area: 17.5 acresCN = 86Tc = 10.8 min.
24hr DesignStorms1yr, 2yr, 5yr,10yr, 25yr, 100yr
Static Structure Outlets: 6”, 18”, 18”, 20” dia.
Flood-Con Gates:18 Gates- 2” incr. (0”-36” dia.)
5 TIMES MORE DISCHARGE
4 TIMES MORE DISCHARGE
2.5 TIMES MORE DISCHARGE
2.5 TIMES MORE DISCHARGE
2.5 TIMES MORE DISCHARGE
2.5 TIMES MORE DISCHARGE
POND
DEVICE
GATES OPENAND CLOSE
TEST COMPARISION
Pre-development data
Drainage Area: 200 Sq. ft.CN = 73Tc = 5 minutes
Post development dataDrainage Area: 200 Sq. ft.CN = 85Tc = 5 minutes
Design Storm2yr-1hr
Depth (in)1.8
Static Structure Outlet:5/16” Circular Orifice
Flood-Con Gates:4 Gates- 1/8”, 3/16”, 1/4”, 5/16”
Pre peak flowrate: 96.25 gphPost peak flowrate: 300 gph(simulated with 500 gph pump)
VALVE
75 GAL TANK
POOL
1/8”
5/16”
STATIC STRUCTURE VS FLOOD-CON- LIMITED TO DESIGN STORMS;- CONTRIBUTE TO EROSION;- DISCHARGE IS BASED ON DEPTH;- LIMITED ATTENUATION OF REAL
STORMS;- PEAK TIME DELAY;- NO RECOGNIZED WATER
QUALITY
- CONTROLS ALL STORMS- BEGINNING TO END;
- NATURAL RUNOFF;- DISCHARGE IS INDEPENDENT OF
POND DEPTH;- ATTENUATES ALL STORMS;- NO PEAK TIME DELAY;- EXTENDED DETENTION AND
RUNOFF REDUCTION FOR IMPROVED WATER QUALITY;
- Wi-Fi COMMUNICATION;- 24/7 CLOUD BASED MONITORING;- WEB APP TO VIEW REAL TIME
PERFORMANCE
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