What is a drainage cell and how does it function in water management systems?

A drainage cell is a lightweight, modular geosynthetic product designed to create an efficient subsurface drainage layer. It typically features a structured or cuspated design that forms interconnected voids, allowing water to flow freely beneath surfaces. When installed under soil, concrete, or paving systems, drainage cells collect and channel excess water away from the surface and underlying structures. They are widely used in applications such as green roofs, podium decks, retaining walls, and landscaping systems, where they help manage water flow and prevent waterlogging.

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