Drainage

150px|right|thumb|A ditch in the Netherlands thumb|right|150px|Ditches at the Ouse Washes [[nature reserve.]] thumb|150px|Waterplants growing in a ditch in the Netherlands, showing Sagittaria sagittifolia to the right. thumb|Major ditch of Sueca, Valencia|Sueca, [[Valencian Community]] A ditch is a small-to-moderate size trench created to channel water. A ditch can be used for drainage, to drain water from low-lying areas, alongside roadways or fields, or to channel water from a more distant source for plant irrigation. Ditches are commonly seen around farmland, especially in areas that have r

thumb|Gargoyles of Notre-Dame de Paris thumb|Dragon-headed gargoyle of the Tallinn Town Hall, [[Estonia]] thumb|Gargoyle of the Vasa Chapel at Wawel in [[Kraków, Poland]]

REDIRECT Storm drain

rainwater harvesting infrastructure

thumb|A metro ventilation grating in Lisbon

sub-surface drainage system

vessel or conduit for unwanted water or waste liquids to be flumed away

underground structure that disposes of unwanted water, most commonly storm water runoff, by dissipating it into the groundwater

thumb|Urban runoff entering a [[storm drain]]

designed to reduce the potential impact of development

flood events in cities and surrounding areas

ditch to drain wet lands

drainage of agricultural lands by wells

system by which the water level on or in the soil is controlled to enhance agricultural crop production

mathematical model

thumb|A pranala at the Brihadisvara Temple, Thanjavur|Brihadisvara Temple in Thanjavur thumb|Another pranala at the Brihadisvara Temple, Thanjavur In Hindu temple architecture, a pranala (IAST: praṇāla) is a discharge outlet attached to the wall of the sanctum. It discharges the lustral water or other liquids poured over the idols.

lake in the province of Pisa

form of engineered sump or percolation pond