Transcript of "MO: Rain Gardens - Sustainable Solutions for Storm Water Runoff"
RainGardensSustainable Solutions for Storm Water Runoff
What is a rain garden? The design of a rain garden emulates natural watersheds and wetlands. A rain garden is a shallow basin that slows down, temporarily holds rainwater, allowing it to be. absorbed into the soil and by the plants Rain gardens can also be a solution to low areas with moist soils
Surrounding terrain that drains into the rain gardenTransition zone of the rain garden Bioswale Surrounding terrain that drains into the rain garden Rain garden basin
Surrounding terrain draining towards rain garden = driest zone Bioswale = alternately wet/dry zone Transition zone surrounds the basin of rain garden = alternately wet/dry zone What is a rain garden Rain garden basin = this zone stays wet the longest, sometimes permanently Overflow spillway is similar to the bioswale and directs flow towards traditional stormwater systemExamples of small residential size rain gardens
Design should include elements for interaction The benefit of natural aestheticsand replaced habitat offers other opportunities for communities,such as education and recreation
Rain Gardens of any size will reduce the quantity andvelocity of storm water runoff. Any reduction is a benefit. Water quality is improved as well
A Few Tips to Keep in Mind*Size is approx. 20-30% of surfacedraining towards rain garden*A rain garden should be no closer than10 ft. from a building*Basin should be 4-8” minimum*Grade to ensure that water flows fromthe source to the rain garden andbeyond to convention storm water