Rain Garden Design Berm

As you can see rain garden 3 is completely full overflowing into the grass before it once again is harnessed by the berm we built along our property line.

Rain garden design berm. Prince george s county bioretention manual. Berm construction once the basin is at the desired depth and level mound up soil on the downhill slope to an elevation level with the uphill side where water enters. Use a berm as a rain garden.

Nov 19 2014 explore diana maranhao s board berm construction on pinterest. Site analysis rain garden design unlined under drained with added subsurface storage source. If the garden is located on a slope use the remaining excavated soil to construct a berm on the downhill side of the rain garden.

The next step in rain garden design is to dig out your rain garden. Rain garden bioretention bed flexible in size and infiltration dynamics provides medium volume reduction medium to high recharge low to. Site analysis rain garden.

I f your rain garden is on a slope use some soil from the initial dig to build a berm on the rain garden s lower side. Berm when installing a rain garden on a slope a berm is constructed on the downhill side using the soil excavated from the basin to create the berm. This is as high as the water will ever get in all three rain gardens for the water is perfectly level at this point and overflowing.

When building the berm the soil should be firmed and reinforced with biodegradable erosion netting and vegetation to increase its stability and prevent settling. Observe the drainage in your yard before installing a rain garden berm. The berm should be rounded and gradually taper on the sides until it meets the existing lawn.

See more ideas about rain garden plants landscape. Soil removed from the depression can be collected on a tarp or near the downhill edge of the rain garden where it will be incorporated into the berm. Water the berm area thoroughly add plants and water again.