With or without water it can be used as a barrier, as an alternative for a fence.
A trench is a long narrow ditch.
Types and applications include:
... (237.5/mi²). The racial makeup of the borough is 89.85% White, 0.75% African American, 0.00% Native American, 7.15% Asian, 0.03% Pacific Islander, 0.81% ...
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