Definition of drainage Drainage

/dɹejˈnʌʤ/ - [dreynuj] - drain•age

We found 11 definitions of drainage from 6 different sources.

What does drainage mean?

WordNet

Noun
drainage - emptying something accomplished by allowing liquid to run out of it
		drain
		emptying, voidance, evacuation the act of removing the contents of something

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Wiktionary

drainage (Noun)
A natural or artificial removal of surface and sub-surface water from a given area.
drainage (Noun)
A system of drains.

Webster DictionaryWebster's Unabridged Dictionary 📘

drainage (n.)
A draining; a gradual flowing off of any liquid; also, that which flows out of a drain.
drainage (n.)
The mode in which the waters of a country pass off by its streams and rivers.
drainage (n.)
The system of drains and their operation, by which superfluous water is removed from towns, railway beds, mines, and other works.
drainage (n.)
Area or district drained; as, the drainage of the Po, the Thames, etc.
drainage (n.)
The act, process, or means of drawing off the pus or fluids from a wound, abscess, etc.

OmegaWiki DictionaryOmegaWiki Dictionary Ω

drainage
1) Removal of groundwater or surface water, or of water from structures, by gravity or pumping.\n2) The discharge of water from a soil by percolation (the process by which surface water moves downwards through cracks, joints and pores in soil and rocks).\n(Source: MGH / WHIT)

Wikipedia

Drainage is the natural or artificial removal of surface and sub-surface water from a given area. Many agricultural soils need drainage to improve production or to manage water supplies.

Early history.

The earliest archaeological record of an advanced system of drainage comes from the Indus Valley Civilization from around 3100 BC in what is now Pakistan and North India. The ancient Indus systems of sewerage and drainage that were developed and used in cities throughout the civilization were far more advanced than any found in contemporary urban sites in the Middle East and even more efficient than those in some areas of modern Pakistan and India today. All houses in the major cities of Harappa and Mohenjo-daro had access to water and drainage facilities. Waste water was directed to covered drains, which lined the major streets.

Reasons for artificial drainage.

Wetland soils may need drainage to be used for agriculture. In the northern USA and Europe, glaciation created numerous small lakes which gradually filled with humus to make marshes. Some of these were drained using open ditches and trenches.

The largest project of this type in the world has been in process for centuries in the Netherlands. The area between Amsterdam, Haarlem and Leiden was, in prehistoric times swampland and small lakes. Turf cutting (Peat mining), subsidence and shoreline erosion gradually caused the formation of one large lake, the Haarlemmermeer, or lake of Haarlem. The invention of wind powered pum