Stormwater detention system and method
AssigneeContech Stormwater Solutions Inc.
InventorsJames C. Schluter, Vaikko P. Allen, II., Daniel P. Cobb, Thomas R. Adams
Life of this patent
Estimating the term…
Abstract
A stormwater runoff detention system includes a system including an inlet, a first surge chamber, a second surge chamber and one or more storage chambers. The first surge chamber is connected to receive stormwater from the inlet prior to the second surge chamber or the storage chamber. The first surge chamber includes a discharge outlet and an overflow outlet to the storage chamber. The second surge chamber is connected to receive stormwater from the inlet primarily after the first surge chamber has begun overflowing to the storage chamber. The second surge chamber includes a discharge outlet and an overflow outlet to the storage chamber or to a second storage chamber.
Claims50
A stormwater runoff detention system, comprising:
- a tank system at least in part defining:
- a first surge volume, a second surge volume and at least one storage volume that is substantially greater than each of the first surge volume and the second surge volume,
- the first surge volume is in fluid communication with a discharge outlet of the tank system to permit stormwater to exit the tank system at a rate not to exceed a first permitted flow rate, the first surge volume is in fluid communication with the at least one storage volume to permit stormwater to enter the at least one storage volume when inflow rate to the first surge volume exceeds the first permitted flow rate;
- the second surge volume is in fluid communication with the discharge outlet of the tank system to permit stormwater to exit the tank system, wherein stormwater exiting the tank system from the first surge volume and the second surge volume does so at a rate not to exceed a second permitted flow rate that is greater than the first permitted flow rate, the second surge volume is in fluid communication with the at least one storage volume to permit additional stormwater to enter the at least one storage volume when combined inflow rate to the first surge volume and the second surge volume exceeds the second permitted flow rate.
A stormwater runoff detention system, comprising:
- a tank system including an inlet, the tank system at least in part defining first and second surge chambers and at least one storage chamber, a first flow passage provided between the first surge chamber and the storage chamber, a second flow passage provided between the second surge chamber and the storage chamber;
- when water flows into the inlet of the tank system at a first flow rate, the first surge chamber fills to a certain level to reach the first flow passage, at which point water flows from the first surge chamber to the storage chamber along the first flow passage;
- when water flows into the inlet of the tank system at a second flow rate that is higher than the first flow rate, the first surge chamber fills to a certain level to reach the first flow passage, at which point water flows from the first surge chamber to the storage chamber along the first flow passage, and subsequent to filling the first surge chamber and water flow into the storage chamber, the second surge chamber fills to a specific level to reach the second flow passage, at which point water flows from the second surge chamber along the second flow passage to the storage chamber.
A stormwater detention system comprising multiple stormwater detaining portions connected together including a storage portion, a first surge portion and a second surge portion the first surge portion and second surge portion each having a respective detention volume less than that of the storage portion, the first and second surge portions being in communication with a discharge outlet configured to allow discharge of stormwater from the first and second surge portions along a path bypassing the storage portion, wherein stormwater flow into the detention system enters the first surge portion, when the first surge portion fills to a predetermined level incoming stormwater flows into at least one of the storage potion and/or the second surge portion.
A method of stormwater detention, the method comprising:
- filling a first surge chamber to a level that establishes a first discharge rate through a discharge outlet of the first surge chamber;
- overflowing any additional inflowing stormwater from the first surge chamber to a first storage volume;
- directing any additional inflowing stormwater in excess of the first storage volume into a second surge chamber to fill said second surge chamber to a level that establishes a second discharge rate through a discharge outlet of the second surge chamber;
- overflowing any additional inflowing stormwater from the second surge chamber to a second storage volume;
- wherein the first storage volume corresponds to a first storm event of specified return period and the first discharge rate corresponds to a legally permitted discharge rate for the first storm event;
- wherein the second storage volume corresponds to a second storm event of less frequent return period than the first storm event, and the combination of the first discharge rate and the second discharge rate corresponds to a legally permitted discharge rate for the second storm event.
Dependencies are inferred from the claim text.