Difference between revisions of "Категория:Динамика воды"

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(Подземные воды)
 
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[[Category:Моделирование]]
 
[[Category:Моделирование]]
[[Category:Вода]]
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[[Категория:Гидрология]]
 
= Различия между [[геоид]]ом и средним уровнем морей (MSL) =
 
= Различия между [[геоид]]ом и средним уровнем морей (MSL) =
 
[[wikipedia:Geoid|The geoid is the shape that the surface of the oceans would take under the influence of Earth's gravity and rotation alone, in the absence of other influences such as winds and tides... the geoid's variation ranges from +85 m (Iceland) to −106 m (southern India), less than 200 m total compared to a perfect mathematical ellipsoid.]]
 
[[wikipedia:Geoid|The geoid is the shape that the surface of the oceans would take under the influence of Earth's gravity and rotation alone, in the absence of other influences such as winds and tides... the geoid's variation ranges from +85 m (Iceland) to −106 m (southern India), less than 200 m total compared to a perfect mathematical ellipsoid.]]
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= Подземные воды =
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= [[Подземные воды]] =
 
[https://en.wikipedia.org/wiki/MODFLOW MODFLOW is the U.S. Geological Survey modular [[Метод конечных разностей|finite-difference flow model]], which is a computer code that solves the groundwater flow equation. The program is used by hydrogeologists to simulate the flow of groundwater through aquifers.]
 
[https://en.wikipedia.org/wiki/MODFLOW MODFLOW is the U.S. Geological Survey modular [[Метод конечных разностей|finite-difference flow model]], which is a computer code that solves the groundwater flow equation. The program is used by hydrogeologists to simulate the flow of groundwater through aquifers.]
 
Integrated with [[aw:GRASS]].
 
Integrated with [[aw:GRASS]].

Latest revision as of 10:05, 4 December 2019

Различия между геоидом и средним уровнем морей (MSL)[edit | edit source]

The geoid is the shape that the surface of the oceans would take under the influence of Earth's gravity and rotation alone, in the absence of other influences such as winds and tides... the geoid's variation ranges from +85 m (Iceland) to −106 m (southern India), less than 200 m total compared to a perfect mathematical ellipsoid.

In aviation, the ellipsoid known as World Geodetic System 84 is increasingly used to define heights; however, differences up to 100 metres (328 feet) exist between this ellipsoid height and mean tidal height. The alternative is to use a geoid-based vertical datum such as NAVD88... The location-dependent, but persistent in time, separation between mean sea level and the geoid is referred to as (stationary) ocean surface topography. It varies globally in a range of ± 2 m.

330px-Geoida.svg.png

wikiru:Квазигеоид[edit | edit source]

В силу неопределимости фигуры геоида, квазигеоид выполняет роль вспомогательной поверхности при изучении физической поверхности Земли. Его фигура, в отличие от геоида, однозначно определяется по результатам измерений, совпадает с геоидом на территории Мирового океана и очень близко подходит к нему на суше, отклоняясь не более чем на 2 метра в высоких горах и на несколько сантиметров на равнинной местности.

Поскольку ортометрическая высота есть высота точки над уровнем моря, то мало отличающаяся от нее нормальная высота будет равна высоте точки от поверхности мало отличающейся от геоида. Молоденский назвал эту поверхность квазигеоидом.


Подземные воды[edit | edit source]

MODFLOW is the U.S. Geological Survey modular finite-difference flow model, which is a computer code that solves the groundwater flow equation. The program is used by hydrogeologists to simulate the flow of groundwater through aquifers. Integrated with aw:GRASS.

Subcategories

This category has the following 3 subcategories, out of 3 total.

Pages in category "Динамика воды"

The following 2 pages are in this category, out of 2 total.