Designing A Rain Garden Swale
Oct 9 2020 rainwater retention design solutions.
Designing a rain garden swale. Mulch bark wood chips and similar walkway materials are not as good of an idea since they will wash away with a heavy rain and could end up in storm water drains. Alternatively in a shallow swale you can install a durable attractive paving stone walkway. You are able to add drainage and apply the rain garden to hold the extra water until it has an opportunity to drain away.
A front yard swale then the drainage area for the sizing criteria would be 300 feet x 15 feet 5400 square feet. See more ideas about rain garden landscape architecture landscape. Prince george s county bioretention manual.
After the rain garden is dug if possible connect a downspout to the rain garden. We were taught in our pdc to calculate catchment x max rain in 24. In my front yard we directed the overflow from the swale into a rain garden.
For this house the front garden was surveyed and the contours planned to work with the natural slope of the land. Rain gardens are shallow planted depressions in the landscape that reduce runoff by allowing it to soak into the ground as opposed to flowing into storm drains or surface waters. For example if you were designing a rain garden to accommodate water from a downspout than you would use a runoff coefficient of 0 9.
As long as you do not impede the flow of water you can line your swale with gravel and place stepping stones along the base to create a walkway. If on a slope this berm goes on the lower end of the slope. See more ideas about permaculture rain garden garden.
Feb 19 2016 explore becky t s board swale on pinterest. Rain garden bioretention bed flexible in size and infiltration dynamics. April 3 2016 at 6 55 pm.