Step 1: Evaluate the Slope. Construction of a swale begins with analyzing the slope of the yard and water runoff patterns to plan the route for the swale ditch. … Step 2: Lay Out the Swale. … Step 3: Excavate the Swale Ditch. … Step 4: Lay Gravel and Drain Tile. … Step 5: Finish the Swale.
What is the difference between a swale and a ditch?
To put it simply, a ditch is made to carry water away and a swale is made to collect and slowly release water into the landscape.
Why are swales bad?
Swales without trees can possibly be even more damaging than the flow of water they have pacified. In some climates, they can potentially oversaturate the landscape, leaving a designer with difficult growing conditions.
Who can build a swale?
Creating a Swale You can build a small swale yourself, but should hire a pro with earth-moving equipment for a long, wide one. Consult a landscape contractor or a civil engineer if you live near a bluff, have a septic tank nearby, or are on a slope that drops more than 1 foot over a horizontal distance of 20 feet.
How deep is a swale?
There are no hard rules about the size of a swale, but the bigger it is the more water it can absorb during a rainstorm. Six- to 12-inches deep and 3- to 4-feet wide are typical dimensions. Smooth out the shape of the berm with a hard metal rake to form a planting bed.
What is a swale in a yard?
A: A swale is simply a shallow ditch that is used to carry off water. Swales are often so wide and so shallow that you do not notice them. On most city lots, where homes are 10 to 15 feet apart, there is a swale between the homes. Such swales collect water from the roofs and yards and carry it to the street.
How do you fix a swale?
- SUGGESTED MAINTENANCE ACTIONS.
- MONTHLY.
- • Inspect your swale during and after storms to make sure that rainwa- ter has drained and there is no erosion. • …
- SEASONALLY.
- • Mow grass no shorter than 3 to 6 inches. Remove and compost all grass clippings. …
- AS NEEDED.
- • Reseed bare areas to avoid erosion. …
- DO NOT:
How do you size a swale?
When constructing a swale with known side slopes, the width of the swale can be defined in terms of the depth. For example, 3:1 side slopes on a swale indicates that for every 1 foot of depth, each side slope will be 3 feet wide, for a total swale width of 6 feet.
What do swales look like?
For the sake of swale newbies, the basic concept of a swale on contour is to catch water as it drains and hold it in place until it absorbs into the ground. It looks a bit like a massive ditch with closed ends, trapping all of the water as opposed to having it flow anywhere.
How much water will a swale hold?
If your rain garden (aka swale) is 10′ wide and 8-1/2′ long, its area (10′ x 8.5′) is 85 square feet. So at 12” deep, it will hold about 620 gallons of rainwater.
Article first time published on
Are swales effective?
Vegetated swales are most effective on soils that allow infiltration. If infiltration is desired, the underlying soil drainage rate should exceed 0.5 inches per hour. Amended topsoil can be installed to improve infiltration and retention of runoff.
Do I need a swale?
The primary purpose of most swales in dry climates is to protect structures and to slow down or divert water. While it might seem like our drought-prone state would not need much in the way of excess water management, drainage swales are a critical part of flood prevention and help keep our ground water cleaner.
Is River Rock good for drainage?
River rock driveways work well because unlike asphalt or concrete, they will not split or dent overtime. They also provide superior drainage, allowing water to soak into the ground, instead of running off. Also unlike an asphalt or concrete driveway, you can install river rock gravel yourself.
Can I plant trees in a swale?
It’s important to regard swales not just as a method of slowing and holding water but as a tree growing system. … A mound or berm is used to plant trees downslope from the swale and a level sill spillway allows the water to passively flow to a predetermined area, such as another swale, a pond, much basin, etc.
Is it swell or swale?
What is a swell on your property? In simple terms, they are generally shallow ditches that have gently sloping sides. … Locally, swales can be used for this purpose, but they are more often an integral part of the drainage plan for residential, commercial and municipal properties.
Where can I build swales?
Step 2: Identify the ideal site for a permaculture swale. It should be: 10 feet away from a building (water must drain away from building) 18 feet away from the edge of a steep slope or septic drain field. Uphill from a garden or low spot that doesn’t drain well.
Who owns a swale?
Although swales are public property—they are typically owned by the County or perhaps the municipality you live in—by law, property owners are supposed to maintain the swales in front of their properties.
What is concrete swale?
Concrete swale on a commercial site conveys stormwater to a drain inlet. DESCRIPTION. An A/C swale is a man-made drainage channel designed, shaped, and lined to convey surface runoff in a non-erosive manner downstream to a treatment and/or infiltration system.
Can I remove a swale?
Stabilize the soil by planting new vegetation. Use rocks if needed to slow the flow. Can I remove the swale? No, you cannot remove any facilities that were part of your building installation.
What is the opposite of a swale?
noun. A low area (especially a marshy area between ridges). Antonyms. natural elevation. trough.
What is a swale permaculture?
A permaculture swale is a shallow trench dug along the land’s contour, with a berm on the downhill side created with soil from the trench. All points along a contour line are exactly the same height above sea level. … Permaculture swales can ease the effort of food production while improving the local ecology.
What is the minimum slope for a swale?
The minimum slope for grassy swales and drainage ways is 1 percent to prevent standing water and muddy conditions. Slopes for walkways will not exceed 5 percent, unless unavoidable. Slopes greater than 5 percent may make the construction of special ramps for the disabled necessary. The maximum cross-slope is 2 percent.
What should be the slope of a swale?
The minimum swale length is 50 feet. The maximum allowable side slope is 3:1, with a recommended side slope of no more than 4:1. The maximum allowable velocity of the Water Quality Design storm is 0.9 feet per second.
What is a check swale?
A check dam is a small dam constructed across a drainage ditch, swale, or channel to lower the velocity of flow. Reduced runoff velocity reduces erosion and gullying in the channel and allows sediments to settle out. A check dam may be built from stone, sandbags filled with pea gravel, or logs.
Do Swales attract bugs?
Swales can also be designed to attract beneficial insects and wildlife.
What is a swale in a driveway?
A swale is a shallow depression that is wider than it is deep. Creating a swale along one or both sides of your driveway will provide a place for storm-water to collect and re-enter the groundwater. They will also keep any water draining off the hillside from flowing down your driveway and flooding your garage or home.
