drainage
Drainage refers to the deliberate conduction of water using man-made devices. A distinction is made between open drainage (e.g. gutters, drainage channels) and closed drainage (e.g. rainwater downpipes).
Drainage refers to the deliberate conduction of water using man-made devices. A distinction is made between open drainage (e.g. gutters, drainage channels) and closed drainage (e.g. rainwater downpipes).