drain pipe or waste pipe used for carrying off wastewater or rainwater

The weight of water moved aside by a ship's hull, commonly used to measure the size or weight of a vessel.

A ditch or channel used for discharging wastewater, rainwater, or excess ground water; gutter

A hole or passage used to drain away wastewater, rain, or other liquids; plughole.

water management projects built to handle excess rainwater and prevent flooding or crop failure

drainage ditch; gutter; culvert

an opening for water to flow out; drainage hole, plughole, or outfall