Swale
/sweɪl/
Definition
Swale refers to a shallow, broad depression in the ground designed or used to slow, collect, and direct surface water through a landscape. In gardening and land management, it differs from a ditch because it is usually gently sloped and intended to encourage water infiltration into the soil rather than rapid drainage. Swales are often planted or placed near planting areas to help manage runoff and support soil moisture.
Use in Gardening
- Water infiltration: A swale slows runoff so water can soak into the soil instead of leaving the site quickly. That stored moisture can support nearby roots longer between rains.
- Plant placement: Moisture levels vary from the bottom to the edges, so plant choice matters. Species that tolerate periodic wet soil fit lower areas, while drought-tolerant plants usually suit the berm or upper slope better.
- Erosion control: By reducing the speed of moving water, a swale helps limit soil loss on sloped ground. Dense roots from grasses, sedges, or other soil-holding plants can further stabilize the shape.
- Rain garden link: A swale often works with rain gardens and other drainage plantings by directing water to places where it can be absorbed. This can reduce puddling around beds, paths, and foundations when the layout is planned well.
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