There are several types of situations for which a rain garden would be an appropriate choice for a landscape solutions & Stormwater management. Raingardens are suited for applications in urban and rural environments and are able to be incorporated into existing development as well as new development. Rain gardens are means to improve water quality and reduce peak stormwater runoff volumes.
A rain garden is a garden which takes advantage of excess stormwater runoff in its design and plant selection. Usually, it is a small garden which is designed to withstand high moisture content and concentrations of nutrients, like Nitrogen and Phosphorus that are found in stormwater runoff.
A raingarden is a an attractive garden. It supports habitat for floura and founa, it may be a formal landscape amenity or it may be incorporated into a larger garden as a border or as an entry feature. What makes it a rain garden is in how it gets its water and what happens to that water once it arrives in the garden space.
Below the surface of the garden, a number of processes are occurring which copies the hydrologic action of a healthy forest. Soils are bio-engineered and correct plants species are selected for the rain garden. The garden is a small bioretention cell tank in which stormwater is filtered, stored and dispersed, Nutrient levels and sediment loads in the stormwater are reduced by the action of the plants and growing media. Combination of gras swales and raingardens over an area will have a positive cumulative effect on both the volume and quality of stormwater run off.
There are two basic types of rain gardens – under-drained and self-contained. Both types of rain gardens are used to improve stormwater quality, reduce runoff volumes and generally facilitate infiltration of cleaned water. Which type of garden is selected depends on volumes of water to be treated, existing soil conditions, available space, and budget for the project.