Install Pump to prevent flooding
Install Pump to prevent flooding
(OP)
I am currently working with a property owner who owns a building in an industrial park. When he bought the building he did not realize that during heavy rains his building will flood. This is because his neighbors filled in the drainage ditches to expand their parking lots, not knowing they were causing his future building to flood. The neighbors are not excepting responsibility and refuse to re establish the ditches.
Now he owns this said building and would like to keep the water from flooding him out. To help come up with a solution I have created a drainage model of the contributing area. The area consists of 5.60 acres of paved surfaces. The calculated runoff to his building (low point) is approximately 20.9 cfs with a rain intensity of 3.89 in/hr and a time of concentration at 20 min.
I would like to install a pump that will collect the water and pump the water to a ditch line that is up hill of his property. The distance to the ditch from the pump is approximately 350 feet with an elevation difference of approximately 5 feet. I would like some assistance in sizing the right pump discharge that will keep up with a storm event and collect the water before it makes it to the building. Can someone give me some advice on the best way engineer this?
Thank you!
Now he owns this said building and would like to keep the water from flooding him out. To help come up with a solution I have created a drainage model of the contributing area. The area consists of 5.60 acres of paved surfaces. The calculated runoff to his building (low point) is approximately 20.9 cfs with a rain intensity of 3.89 in/hr and a time of concentration at 20 min.
I would like to install a pump that will collect the water and pump the water to a ditch line that is up hill of his property. The distance to the ditch from the pump is approximately 350 feet with an elevation difference of approximately 5 feet. I would like some assistance in sizing the right pump discharge that will keep up with a storm event and collect the water before it makes it to the building. Can someone give me some advice on the best way engineer this?
Thank you!





RE: Install Pump to prevent flooding
RE: Install Pump to prevent flooding
RE: Install Pump to prevent flooding
Runoff volume = 104,999 Gallons
Runoff Rate = 7,000 gpm
My detention Pond can hold 94,097 gallons
Pond will fill = 13.44 minutes
I believe that all I need to to is pump the difference between the runoff volume and pond volume in 13.44 minutes or less. Right?
If this is true Then all I need to do is Pump 10,902 Gal. in 13.44 minutes or less. This calcs out to 811.16 GPM. Right?
RE: Install Pump to prevent flooding
To do the analysis you will need a modeling tool such as HydroCAD that can specifically handle pump outlets, including the switching behavior. For details see www.hydrocad.net/pumps.htm
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: Install Pump to prevent flooding
RE: Install Pump to prevent flooding
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: Install Pump to prevent flooding
RE: Install Pump to prevent flooding
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: Install Pump to prevent flooding
That will make points, right?
If you do go to a pumped system, make it a dual system, all backed up with an emergency generator.
Mike McCann, PE, SE (WA)
RE: Install Pump to prevent flooding
Mike McCann, PE, SE (WA)
RE: Install Pump to prevent flooding
RE: Install Pump to prevent flooding