How do you size a rain garden?
Multiply the width by the length of the catchment area (roof) that directs rain into the downspout. This measurement gives the square footage of the catchment area. 2. Multiply the catchment area by the amount of rain fall.Click to see full answer. Similarly, you may ask, how big should my rain garden be?A rain garden…
Multiply the width by the length of the catchment area (roof) that directs rain into the downspout. This measurement gives the square footage of the catchment area. 2. Multiply the catchment area by the amount of rain fall.Click to see full answer. Similarly, you may ask, how big should my rain garden be?A rain garden should have an area about 20% the size of the roof, patio, or pavement area draining into it. A typical rain garden for a residential home or small building is between 100 and 400 square feet.Beside above, how do you build a rain garden? Create the rain garden by building a berm in a low spot in the yard, then build swales to channel runoff from the gutters and higher parts of the yard. The water is then absorbed into the soil through the network of deep plant roots. Use a mix of plants adapted to your area and to the different water depths. Also know, how much water can a rain garden hold? If your rain garden (aka swale) is 10′ wide and 8-1/2′ long, its area (10′ x 8.5′) is 85 square feet. So at 12” deep, it will hold about 620 gallons of rainwater. If you dig it down just 6” deep, your rain garden will hold only half of that, or just 310 gallons of water.What is the cost of a rain garden?The cost associated with installing residential rain gardens average about three to four dollars per square foot, depending on soil conditions and the density and types of plants used in the installation. Commercial, industrial and institutional site costs can range between ten to forty dollars per square foot.
