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 ...

In order to provide a sufficient surface area to meet the required storage volume, a slope with the ratio of 1:5 was created as side slopes and a 10-inch high berm with a width of 19 (?) inches was ...

He adds that “you want to design [the rain garden] so the area in which the water is going into will be similar to a berm ...