A rain garden or also known as a bioretention cell is a type of depressed area which is containing a backfill which is porous under the vegetated surface. These areas often have the under drain to encourage all the infiltration and the filtration as well, especially in the soils which are clayey. Bioretention cells are providing the pollutant removal, the recharge of groundwater, and the runoff detention as well. These are the most effective solution in the urban areas or even the parking lots, where the green space is pretty limited. So below are the given 5 ways which will enhance the Stormwater Management.
- Gutter and the elimination of curb
Gutters and the curbs transport the flow really very fast to the Stormwater Runoff system without even allowing for the pollutant removal or the infiltration by using the inlet filter. Eliminating the gutters and curbs will reduce the volume of the runoff and will then increase the sheet flow.
- Grassed swales
They are the shallow outlets in the Stormwater Solution systems which are covered with the grass and they help in slowing down the runoff while facilitating the infiltration. The sustainability of the grassed swales always depend on the type of soil, the use of land, the imperviousness of the particular watershed which is contributing, and also the slopes and all the dimensions of the system in grassed swale.
- Green parking design
These, are basically applied by the Stormwater Engineer together, they reduce all the contribution for the parking lots for total covering which is impervious. These types of green parking lot design have the techniques which include the minimizing of the dimensions of the following parking lot spaces, which then sets up a maximum number of the spaces in the parking lots, which then utilizes the alternative pavers which are in the overcrowded parking areas, thus it makes use of the bioretention areas for treating the storm water and the incentives for the structured parking.
- The infiltration trenches
These are the trenches which are generally present in the Stormwater Systems, they are rock filled and without any of the channels. These types of trenches collect the runoffs when it watches any kind of storm happening and then releasing it to the soil through the infiltration. These types of trenches might be used in the conjunction with some other devices which are meant for the infiltration of the storm water by using the inlet filter. This will generally provide the peak flow attenuation and also the quality control for the water. Runoff which contains the higher levels of the hydrocarbons or the sediments which may be clogging the outlets might be needed for being pre-treated by using some other techniques like the water quality inlets.
- Permeable pavement
They basically promote the recharges of the groundwater. Some of the pavements are then used in creating the voids on all the corners of the particular pavers. The concrete grid paver systems are basically made up of the concrete blocks.