[[File:DepressedDrain_SoilCell.png|thumb|400px|Sometimes configured to enclose ponded water which can then infiltrate the soil surrounding the tree, for instance in a depressed drain [[inlets|inlet]] design.]]
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[[File:DepressedDrain_SoilCell.png|thumb|350px|Soil cell surface inlets sometimes configured to enclose ponded water which can then infiltrate the soil surrounding the tree, for instance in a depressed drain [[inlets|inlet]] design.]]