Rain Garden Design Dimensions

Rain gardens work by capturing holding and infiltrating rainwater runoff on individual sites.

Rain garden design dimensions. The next step in rain garden design is to dig out your rain garden. This document will provide the basics for homeowner rain garden engineering design. The size and depth of the rain garden the infiltration rate of the soil the size of the uphill drainage area the amount of impervious or semi impervious surfaces rooftops driveways sidewalks and mowed turf in the uphill drainage area the slope of the site and the amount intensity and duration of rainfall all influence rain garden effectiveness in.

Use table 2 for rain gardens 30 feet or more from the downspout and rain gardens collecting water from lawn areas. The two tables are different because some water will infiltrate as it flows over the lawn for 30 feet or more. Use the table 1 for rain gardens closer than 30 feet from the downspout.

Assess yard identify potential rain garden sites designs design planting layout or use a rain garden template that is sized for your site 10 feet measured along the overflow path between the rain garden overflow point and the nearest impervious surface. How deep you make yours depends on the following. Septic drain field building foundation 10 min.

Rain gardens including small homeowner and community gardens are an important tool for watershed conservation and preservation.