Stormwater chamber detention system
View Patent ↗A stormwater detention system includes a containment row for removing and collecting solids from stormwater. The containment row may be surrounded by a water-impermeable membrane, and designed to receive incoming water before other rows of the detention system. The containment row collects solids from the stormwater before the water is redirected into one or more additional rows, which are water permeable and buried in water permeable media. Filter structure may be associated with a flow system that delivers water from the containment row to the additional rows.
1. A stormwater detention system, comprising:
a containment row buried in water permeable media, the containment row including:
one or more open-bottom chambers, and
a substantially water impermeable membrane covering at least the open bottom of the chambers, the water impermeable membrane preventing water in the containment row from exiting directly into the media through the membrane;
a detention row buried in the water permeable media, the detention row including
one or more open-bottom chambers,
the detention row configured such that water can exit the bottom of the detention row directly into the media;
a pipe system connecting the containment row to the detention row, the pipe system configured such that a substantial portion of water that enters the containment row later exits the containment row and travels to the detention row without first passing into the water permeable media;
wherein the pipe system includes a diversion structure with an overflow weir, such that water up to a certain level within the diversion structure is diverted to the containment row, but water overflowing the weir bypasses the containment row to a downstream side of the diversion structure, and wherein a pipe manifold connects the downstream side of the diversion structure to the detention row;
wherein the weir includes a drain down path, such that water that enters the containment chamber eventually passes back into the diversion structure, and passes out the drain down path to the pipe manifold for delivery to the detention row.
2. The stormwater detention system of claim 1 , wherein the open-bottom chambers included in the containment and detention rows are substantially arch-shaped in cross section and corrugated along their length.
3. A stormwater detention system, comprising:
a containment row buried in water permeable media, the containment row including:
one or more open-bottom chambers, and
a substantially water impermeable membrane covering at least the open bottom of the chambers, the water impermeable membrane preventing water in the containment row from exiting directly into the media through the membrane;
a detention row buried in the water permeable media, the detention row including
one or more open-bottom chambers,
the detention row configured such that water can exit the bottom of the detention row directly into the media;
a pipe system connecting the containment row to the detention row, the pipe system configured such that a substantial portion of water that enters the containment row later exits the containment row and travels to the detention row without first passing into the water permeable media;
wherein the water impermeable membrane is wrapped about the entirety of the containment row with overlap proximate the top portion of the containment row.
4. The stormwater detention system of claim 3 , wherein the pipe system includes an outlet pipe assembly that connects the containment row directly with the detention row, the outlet pipe assembly having an inlet within the containment row and an outlet within the detention row.
5. The stormwater detention system of claim 4 , wherein the inlet of the outlet pipe assembly includes a flow regulator.
6. The stormwater detention system of claim 4 , wherein the outlet pipe assembly includes a riser pipe, the inlet near the top of the riser pipe, and a drain down path along a lower portion of the outlet pipe assembly, such that water entering the containment row exits through either the inlet of the riser pipe or the drain down path.
7. The stormwater detention system of claim 3 , wherein the pipe system includes an outlet pipe assembly that connects the containment row with the downstream side of the diversion structure, the outlet pipe assembly including an inlet opening within the containment row and an outlet within the downstream side of the diversion structure.
8. The stormwater detention system of claim 7 , wherein the outlet pipe assembly includes a flow regulator.
9. The stormwater detention system of claim 7 , wherein the outlet pipe assembly includes a riser pipe, the inlet near the top of the riser pipe, and a drain down path along a lower portion of the outlet pipe assembly, such that water entering the containment row exits through either the inlet of the riser pipe or the drain down path.
10. The stormwater detention system of claim 3 wherein the pipe system includes an associated filter structure for filtering water that exits the containment row and travels to the detention row without first passing into the water permeable media.
11. The stormwater detention system of claim 10 wherein the filter structure comprises a filter material disposed around at least a portion of the pipe system that is located within the containment row, the portion comprising a perforated pipe structure.
12. The stormwater detention system of claim 11 wherein the portion comprises a flexible perforated pipe surrounded by the filter material, and is inserted within a rigid perforated pipe within the containment row.
13. A stormwater detention system, comprising:
a containment row buried in water permeable media, the containment row including:
one or more open-bottom chambers, and
a substantially water impermeable membrane covering at least the open bottom of the chambers, the water impermeable membrane preventing water in the containment row from exiting directly into the media through the membrane;
a detention row buried in the water permeable media, the detention row including
one or more open-bottom chambers,
the detention row configured such that water can exit the bottom of the detention row directly into the media;
a pipe system connecting the containment row to the detention row, the pipe system configured such that a substantial portion of stormwater that enters the containment row later exits the containment row and travels to the detention row without first passing into the water permeable media;
wherein the pipe system includes an associated filter structure for filtering water that exits the containment row and travels to the detention row without first passing into the water permeable media;
wherein the filter structure comprises a filter material within the containment row and located to feed water from the containment row to the pipe system.
14. The stormwater detention system of claim 13 wherein the filter material is wrapped about a generally flat strip drain structure that has one end connected to the pipe system.
15. A stormwater detention system, comprising:
a containment row buried in water permeable media, the containment row being substantially water impermeable to limit delivery of water from the containment row directly into the water permeable media;
a detention row buried in the water permeable media, the detention row including
one or more open-bottom chambers,
the detention row configured such that water can exit the bottom of the detention row directly into the media;
a flow system connecting the containment row to the detention row, the flow system configured such that a substantial portion of water that enters the containment row later exits the containment row and travels to the detention row without first passing into the water permeable media;
wherein the flow system includes a diversion structure with an overflow weir, such that water up to a certain level within the diversion structure is diverted to the containment row, but water overflowing the weir bypasses the containment row to a downstream side of the diversion structure, and wherein a pipe manifold connects the downstream side of the diversion structure to the detention row, and a flow path back from the containment row to the diversion structure such that the water that enters the containment chamber eventually passes back into the diversion structure and then to the pipe manifold for delivery to the detention row.
16. The stormwater detention system of claim 15 wherein the containment row is fed by a pipe associated with the diversion structure for delivering water from an upstream side of the diversion structure into the pipe, the pipe extends within and along the containment row and includes an associated filter material, water travels through the filter material in order to enter a main volume of the containment row.
17. The stormwater detention system of claim 16 wherein the main volume of the containment row is connected to permit flow of filtered water to a downstream side of the diversion structure for subsequent delivery to the detention row.
18. The stormwater detention system of claim 17 wherein the containment row is formed by a non-perforated pipe structure.
19. The stormwater detention system of claim 15 wherein water traveling along the flow path back from the containment row to the diversion structure passes through the weir before entering the pipe manifold.