- This article refers to the landform. For other uses, see Gully (disambiguation).
A gully is a landform created by running water eroding sharply into soil, typically on a hillside. Water is a common Chemical substance that is essential for the survival of all known forms of Life. Erosion is the carrying away or displacement of solids ( Sediment, Soil, rock and other particles usually by the agents of currents such as wind Soil, often typeset as SOiL, is a four piece rock band from Chicago Illinois United States founded by Shaun Glass Tom Schofield Tim King and Adam Zadel Gullies resemble large ditches or small valleys, but are metres to tens of metres in depth and width. A ditch is usually defined as a small to moderate depression created to channel Water. In Geology, a valley (also called a vale, dale, glen or strath and near or in Appalachia, a draw) is The metre or meter is a unit of Length. It is the basic unit of Length in the Metric system and in the International When the gully formation is in process, the water flow rate can be substantial, which causes the significant deep cutting action into soil. The volumetric flow rate in Fluid dynamics and Hydrometry, (also known as volume flow rate or rate of fluid flow) is the volume of fluid which
Gullying, or gully erosion, is the process by which gullies are formed. Hillsides are more prone to gullying when they are cleared of vegetation, through deforestation, over-grazing or other means. Deforestation is the conversion of Forested areas to non-forest land for use such as Arable land, Pasture, urban use logged area or wasteland Overgrazing occurs when plants are exposed to Livestock Grazing for extended periods of time or without sufficient recovery periods The eroded soil is easily carried by the flowing water after being dislodged from the ground, normally when rainfall falls during short, intense storms such as during thunderstorms. Soil, often typeset as SOiL, is a four piece rock band from Chicago Illinois United States founded by Shaun Glass Tom Schofield Tim King and Adam Zadel Rain is Liquid precipitation. On Earth it is the condensation of atmospheric Water vapor into drops heavy enough to fall often making it to Gullies reduce the productivity of farmland where they incise into the land, and produce sediment that may clog downstream waterbodies. In Geography, arable land (from Latin arare, to Plough) is an agricultural term meaning land that can be used for Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of A body of water is any significant accumulation of Water, usually covering the Earth or another planet Because of this, much effort is invested into the study of gullies within the scope of geomorphology, in the prevention of gully erosion, and in restoration of gullied landscapes. Geomorphology (from Greek: γη ge, "earth" μορφή morfé, "form" and λόγος Logos, "knowledge" The total soil loss from gully formation and subsequent downstream river sedimentation can be sizable. "Riverine" redirects here For the use of that term in Maritime geography, see there Sedimentation describes the motion of Molecules in Solutions or particles in suspensions in response to an external force such as gravity
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Hydraulic mining
Artificial gullies are formed during hydraulic mining when jets or steams of water are projected onto soft alluvial deposits to extract gold or tin ore. Hydraulic mining, or hydraulicking, is a form of Mining that employs Water to dislodge rock material or move sediment Alluvium (from the Latin, alluvius, from alluere, "to wash against" is Soil or Sediments deposited by a river or other running Gold (ˈɡoʊld is a Chemical element with the symbol Au (from its Latin name aurum) and Atomic number 79 Cassiterite is a Tin Oxide Mineral, SnO2. It is generally opaque but is translucent in thin crystals The remains of such mining methods are very visible landform features in old goldfields such as in California and northern Spain. California ( is a US state on the West Coast of the United States, along the Pacific Ocean. Spain () or the Kingdom of Spain (Reino de España is a country located mostly in southwestern Europe on the Iberian Peninsula. The badlands at Las Medulas for example, were created during the Roman period by hushing or hydraulic mining of the the gold-rich alluvium with water supplied by numerous aqueducts tapping nearby rivers. Badlands are a type of Arid Terrain where softer sedimentary rocks and Clay -rich Soils have been extensively eroded by Wind Las Médulas, located near the town of Ponferrada in León province, Spain, used to be the most important Gold mine in the Roman Hushing is an ancient Mining method using a flood or torrent of water to reveal mineral veins Hydraulic mining, or hydraulicking, is a form of Mining that employs Water to dislodge rock material or move sediment Each aqueduct produced large gullies below by erosion of the soft deposits. An aqueduct is an artificial channel that is constructed to convey water from one location to another The effluvium was carefully washed with smaller streams of water to extract the nuggets and gold dust.
Etymology
The earliest usage of the term is from 1657. It originates from the French word goulet, a diminutive form of goule which means throat. French ( français,) is a Romance language spoken around the world by 118 million people as a native language and by about 180 to 260 million people It is possible that the term was derived from a type of knife at the time, a gully-knife, because hills that have gullies look as if they are cut open with a sharp knife. A knife is a handheld sharp-edged instrument consisting of handle attached to a Blade used for cutting
See also
References
- Oxford English Dictionary
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