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Depth Notes / references 1= Caspian Sea and its shores: Azerbaijan, Russia, and Kazakhstan: −28 m (−92 ft) Caspian Depression: 1= Baku: Azerbaijan: −28 m (−92 ft) lowest lying national capital in the world, Caspian Depression: 3: Atyrau Airport: Kazakhstan: −22 m (−72 ft) lowest international airport, Caspian Depression: 4 ...
Hypoxia can occur throughout the water column and also at high altitudes as well as near sediments on the bottom. It usually extends throughout 20–50% of the water column, but depends on the water depth and location of pycnoclines (rapid changes in water density with depth). It can occur in 10–80% of the water column.
In geography, hydrography, and fluvial geomorphology, a thalweg or talweg (/ ˈ t ɑː l v ɛ ɡ /) is the line or curve of lowest elevation within a valley or watercourse. [1] Its vertical position in maps is the nadir (greatest depth, sounding ) in the stream profile .
The lowest (from surface) artificially made point with open sky may be the Bingham Canyon Open Pit Copper Mine, Utah, United States, at a depth of 1,200 m (3,900 ft) below surface level. The lowest point underwater is the 10,685 m (35,056 ft)-deep (as measured from the subsea wellhead ) oil and gas well drilled on the Tiber Oil Field in the ...
Sonar mapping of the Challenger Deep by the DSSV Pressure Drop employing a Kongsberg SIMRAD EM124 multibeam echosounder system (26 April – 4 May 2019). The Challenger Deep is a relatively small slot-shaped depression in the bottom of a considerably larger crescent-shaped oceanic trench, which itself is an unusually deep feature in the ocean floor.
Common chart datums are lowest astronomical tide (LAT) [1] and mean lower low water (MLLW). In non-tidal areas, e.g. the Baltic Sea , mean sea level (MSL) is used. [ 2 ] A chart datum is a type of vertical datum and must not be confused with the horizontal datum for the chart.
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Badwater Basin is an endorheic basin in Death Valley National Park, Death Valley, Inyo County, California, noted as the lowest point in North America and the United States, with a depth of 282 ft (86 m) below sea level. [1] [2] Mount Whitney, the highest point in the contiguous United States, is only 84.6 miles (136 km) to the northwest. [3]