A swale is a depression in the ground that is created to collect and subsequently carry rainwater away from a home. It is designed in a way that uses gravity flow to divert rainwater away from the property. Swales are an excellent technique in rainwater harvesting since they not only capture surface runoff, but are also great for nourishing trees and reducing erosion. Swales are often used with ponds, dams, grey water systems, rainwater harvesting, and other water catchments.
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