basin


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basin

1. any partially enclosed or sheltered area where vessels may be moored or docked
2. the catchment area of a particular river and its tributaries or of a lake or sea
3. a depression in the earth's surface
4. Geology a part of the earth's surface consisting of rock strata that slope down to a common centre

basin

A huge crater. Lunar basins are multiringed structures that are several hundred kilometers in diameter and were all produced during the first 750 million years of lunar history by intense meteoritic impact. The youngest basins (Orientale, Imbrium, Crisium, Nectaris, and Serenitatis) may have been excavated during a cataclysmic period around 3900 million years ago. The ejecta blankets of basins are extensive and provide the basis for highland stratigraphy. Basins are so defined by their systems of concentric ring structures, most of which are now in the form of ridges and mountain arcs. Basins on the Moon's nearside were filled with lava at some time up to 3000 million years ago to produce maria: the resulting mare has the same name as the basin (e.g. Mare Imbrium). Several unfilled basins (thassaloids) exist on the farside, the largest of which was revealed as a vast depression by the Apollo 15 laser altimeter. At least 28 basins are now known to exist. See also rille; mascons.

Basin

 

the accumulation of water flows with no drainage or with slow drainage in natural or artificial depressions in the earth’s surface. Basins are formed when there are en-closed hollows on the surface and when the water flowing into them exceeds the water lost by evaporation and seepage into the soil. Basins can be permanent or temporary, arising only during periods of the year which abound in water. Basins are classified as freshwater or saltwater, depending upon their chemical composition and the amount of salts dissolved in the water. The physical, chemical, and bio-logical processes in basins progress in various ways, depending upon the type of basin. Reservoirs, ponds, and canals are artificial basins.


Basin

 

negative (hollow) form of relief of the earth’s surface with more or less isometric or slightly elongated outlines. A basin may be closed on all sides or open in one or two directions. On the basis of morphology flat-bottom, bowl-shaped, and other basins are distinguished; by origin basins are divided into tectonic, volcanic (for example, calderas), erosion, glacial (for example, moraine-dammed basins), deflation, and karst. By drainage conditions they are divided into basins through which water flows, basins with outlets, and basins without outlets (in arid regions).

In the geomorphology of the sea floor a distinction is made between basins in the transition zone, which are occupied by geosynclinal seas, and oceanic basins, which are the largest negative forms of relief on the ocean floor.

basin

[′bās·ən]
(civil engineering)
A dock employing floodgates to keep water level constant during tidal variations.
A harbor for small craft.
(design engineering)
An open-top vessel with relatively low sloping sides for holding liquids.
(geology)
A low-lying area, wholly or largely surrounded by higher land, that varies from a small, nearly enclosed valley to an extensive, mountain-rimmed depression.
An entire area drained by a given stream and its tributaries.
An area in which the rock strata are inclined downward from all sides toward the center.
An area in which sediments accumulate.
(metallurgy)
The mouth of a sprue in a gating system of castings into which the molten metal is first poured.
(oceanography)
Deep portion of sea surrounded by shallower regions.

basin

1. A somewhat shallow vessel for holding water (or the like).
2. A shallow tank or natural or artificial depression containing water.
References in periodicals archive ?
In this way, the 5th-order basin, which in this approach was taken to be of the highest magnitude, is delimited and assigned code 5 (1) in the data-base.
has expanded its reserve base by acquiring interests in 38 oil and natural gas wells located in four different Basins in the continental United States that have generated significant amounts of oil and natural gas production.
The size-frequency distribution of endorheic basins (Figure 1) is characterised by a very small number of very large basins and a large number of small basins and can be described by the power function V = 8705 [N.sup.-1.5026] with V = basin volume and N = number of basins.
Objective:the asian development bank funded karnataka integrated sustainable water resources management investment program (kiswrmip) program has a major component to be implemented by advanced center for integrated water resources management (aciwrm) and river basin planning is the flagship activity initially piloting in tungabhadra sub-basin (k-8) of krishna basin in karnataka.
The Indus Basin is accompanied by different structural events that makes a unique way of traping mechanism.
New Delhi [India], Nov 22 ( ANI ): National Mission for Clean Ganga, in association with GIZ India, organised an International workshop in New Delhi on River Basin Management at different levels and the role of River Basin Organisations (RBOs) in support of Ganga Rejuvenation.
'Of course,' according to DENR's River Basin Office Director Antonio Dano, 'An ounce of prevention is worth a pound of cure.
According to the company, it is focused on developing, owning and operating midstream energy infrastructure assets that are strategically located in the core producing areas of unconventional resource basins, primarily shale formations, in the continental US.
For example, in a river basin, instead of forming a single, basinwide governing body, local agencies and stakeholders work together at smaller scales, but coordinate their efforts across the basin.
The department noted that the country has at least 16 sedimentary basins straddling roughly 709,000 square kilometers of service areas for prospective new oil and gas finds.
The River Basin Control Office of the Department of Environment and Natural Resources funded the formulation of the master plan for the three river basins.
Quantitative morphometric analysis of drainage basin can give us statistics about the hydrological behavior of the rocks, discovered in the drainage basin.