Drainage management systems and methods
A flow limiting inlet structure is designed to collect water or other fluids in a pool above grade, and to provide improved capture of sediments and surface pollutants such as oils and greases in the pool, while regulating the flow of water or other fluids during discharge into an outlet pipe. In a conventional storm water detention basin a vertical cylindrical discharge structure can be used to regulate the basin water depth and discharge flow rate of storm water out of the detention basin, in conjunction with the use of a specially designed baffle system that prevents the release of any greases or oils floating on the water surface while capturing any floating trash or debris.
1. A flow limiting inlet structure comprising:
a discharge riser surrounded by a plurality of nested baffles wherein each baffle is coupled to the discharge riser;
water is able to flow over an upper edge of each of the plurality of baffles into openings on the discharge riser and wherein an inlet area created by the nested baffles increases as fluid depth decreases; and
each of said plurality of baffles having the upper edge defining an opening allowing water to flow over the upper edge of the baffle and into the opening on the discharge riser wherein the openings on the discharge riser are through and further wherein the openings on the discharge riser are sized and positioned such that they are sufficient to allow as much fluid to flow into the openings as water depth rises on the discharge riser as can flow through the opening.
2. A flow limiting inlet structure comprising:
a discharge riser surrounded by a plurality of nested baffles, the space between the nested baffles defining an inlet area; and
each of the nestled baffles has an upper edge and a lower edge;
the upper edge defines a upper opening spaced from the riser;
the lower edge defines a lower opening spaced from the riser;
the discharge riser having a plurality of openings and further wherein each of said nested baffles is connected to the riser such that water is able to flow over the upper edge of the baffles and into the plurality of openings of the discharge riser while hindering floating surface contaminants from entering the plurality of openings of the discharge riser wherein the openings allow for fluid flow through the openings as fluid level rise above each subsequent baffle.