A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, flat regions covered with wind-swept sand or dunes with little or no vegetation are called ergs or sand seas. Dunes occur in different shapes and sizes, but most kinds of dunes are longer on the stoss side, where the sand is pushed up the dune, and have a shorter slip face in the lee side. The valley or trough between dunes is called a dune slack. Dunes are most common in desert environments, where the lack of moisture hinders the growth of vegetation that would otherwise interfere with the development of dunes.
关于Dune
On the desert planet of Arrakis, young Paul Atreides leads nomadic tribes in a battle to gain control over resources. The film is an adaptation of Frank Herbert's novel of the same name.
Dune的成就
The film was directed by Denis Villeneuve. It was originally scheduled to release in December of 2020 but was pushed back 10 months due to the Coronavirus pandemic.
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Antidune - An antidune is a bedform found in fluvial and other channeled environments. Antidunes occur in supercritical flow, meaning that the Froude number is greater than 1.0 or the flow velocity exceeds the wave velocity; this is also known as upper flow regime.. Devil's stovepipe - A devil's stovepipe is a hole formed when a tree that has been buried by an encroaching sand dune decomposes. Under certain conditions the bark will remain intact even after the core of the tree has rotted away.. Ice dune - An ice dune, also called an ice ridge or an ice foot, is a formation of ice that accumulates on the shores of many arctic beaches and is also common along the shores of the Great Lakes during the winter.. Masseira - Masseira is a unique form of traditional farming practised in Póvoa de Varzim and Esposende in Portugal.. Médanos - In South America, the word médanos refers to continental dunes whereas dunas refers to dunes of coastal origin. Médanos may be vegetated or unvegetated. For example, the médanos of La Pampa Province in Argentina are mostly vegetated dunes with occasional blowouts.. Sandhill - A sandhill is a type of ecological community or xeric wildfire-maintained ecosystem. It is not the same as a sand dune. It features very short fire return intervals, one to five years. Without fire, sandhills undergo ecological succession and become more oak dominated.. Aeolian landforms.. Dunes.. Coastal and oceanic landforms.. Coastal geography.
