e/Land drains

Information
has gloss	eng: The purpose of a land drain is to allow water in wet or swampy ground to rapidly drain away or to relieve hydrostatic pressure. They are subterranean linear structures which are laid to a fall which should be as steep as practicable. They are used in agriculture and in building construction sites. Modern land drains take the form of a perforated or discontinuous (ie open jointed)pipe. Typically the land drains conduct the surplus water to an open ditch or natural watersourse.
lexicalization	eng: land drains
instance of	c/Archaeological features