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Places where seawater and rainwater is pumped away are included. Fully natural places below sea level require a dry climate; otherwise, rain would exceed evaporation and fill the area. All figures are in meters below mean sea level (as locally defined), arranged by depth, lowest first:
An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 and 6,000 metres (9,800 and 19,700 ft).Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth's surface.
The word ghati (Hindi: घाटी) means valley. [30] In Marathi, Hindi, Gujarati and Kannada, ghat is a term used to identify a difficult passage over a mountain. [31] One such passage is the Bhor Ghat that connects the towns Khopoli and Khandala, on NH 4 about 80 kilometres (50 mi) north of Mumbai. Charmadi Ghat of Karnataka is also notable.
In East Asia, a nullah (Chinese: 明渠; pinyin: míngqú; Wade–Giles: ming 2-chʻü 2; Jyutping: ming 4 keoi 4; lit. 'open ditch') refers to an open, usually concrete-lined flood control channel designed to allow rapid drainage of stormwater or a sewerage channel for industrial wastewater from high ground, to prevent flooding or stagnation in urbanised coastal areas, [4] and basically is an ...
The seabed (also known as the seafloor, sea floor, ocean floor, and ocean bottom) is the bottom of the ocean.All floors of the ocean are known as 'seabeds'. The structure of the seabed of the global ocean is governed by plate tectonics.
Bathymetry (/ b ə ˈ θ ɪ m ə t r i /; from Ancient Greek βαθύς (bathús) 'deep' and μέτρον (métron) 'measure') [1] [2] is the study of underwater depth of ocean floors (seabed topography), lake floors, or river floors. In other words, bathymetry is the underwater equivalent to hypsometry or topography.
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An underwater environment is a environment of, and immersed in, liquid water in a natural or artificial feature (called a body of water), such as an ocean, sea, lake, pond, reservoir, river, canal, or aquifer. Some characteristics of the underwater environment are universal, but many depend on the local situation.