Rain Garden Design And Construction Guidelines

Most gardens slope away from buildings and it is usual to establish a rain garden on a gentle slope the steeper it is the more difficult it is to remodel the ground to create a level perimeter. Underground utilities and tree roots may also influence the placement of the rain garden. If the water disappears within 48 hours the site is suitable for a rain garden.

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Since a rain garden surface must be flat the amount of grading required during construction increas es with slope.

Rain garden design and construction guidelines. You ll need a minimum slope of 1 in. Dig a wide hole 10 inches deep and fill it with water. Locate your rain garden where rainwater will feed into it from downspouts driveways or low points in your yard.

The right site size and shape for the rain garden. Rain gardens should not be built on land with a slope greater than 15. A rain garden is based on a planter it will normally be most convenient to place it below the downpipe and close to the receiving drain.

If your first site fails the 48 hour test test the soil at other potential rain garden sites on your property. Either by hand or with an excavator. If you re planning to divert your roof gutters into your rain garden you won t want to install the feature too far away from your home but you must place it at least ten feet away from your home.

If your yard doesn t have a natural depression you will need to create one by digging. If you don t have this slope you ll have to do major landscaping both to create the slope and to improve drainage. Plus sign if content is closed x if content is open.

2 percent for water to flow into your rain garden.

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