In geography a bank generally refers to the land alongside a body of water. Various structures are referred to as banks in different fields of geography.
In limnology, the study of inland waters, a stream bank or river bank is the terrain alongside the bed of a river, creek, or stream. Stream banks are of particular interest in fluvial geography, which studies the processes associated with rivers and streams and the deposits and landforms created by them. The shoreline of ponds, swamps, estuarys, reservoirs, or lakes are also of interest in limnology, and are sometimes referred to as banks. The grade of these banks or shorelines can vary from vertical to a shallow slope.
In freshwater ecology, banks are of interest as the location of riparian habitats. Riparian zones occur along upland and lowland river and stream beds. The ecology around and depending on a marsh, swamp, slough, or estuary, sometimes called a bank, is likewise studied in freshwater ecology.
Banks are also of interest in navigation, where the term can refer either to a barrier island or a submerged plateau. A barrier island is a long narrow island composed of sand and forming a barrier between an island lagoon or sound and the ocean. A submerged plateau is a relatively flat topped elevation of the sea floor at shallow depth (generally less than 200m), typically on the continental shelf or near an island.
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