The difference between Drainage basin and Watershed
When used as nouns, drainage basin means a topographic region in which all water drains to a common outlet, whereas watershed means the topographical boundary dividing two adjacent catchment basins, such as a ridge or a crest.
check bellow for the other definitions of Drainage basin and Watershed
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Drainage basin as a noun (hydrology):
A topographic region in which all water drains to a common outlet; a watershed.
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Watershed as a noun (hydrology):
The topographical boundary dividing two adjacent catchment basins, such as a ridge or a crest.
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Watershed as a noun (US):
A region of land within which water flows down into a specified body, such as a river, lake, sea, or ocean; a drainage basin.
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Watershed as a noun:
A critical point marking a change in course or development.
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Watershed as a noun (Canada, British):
The time after which material of more adult nature (violence, swear words, sex) may be broadcast on television or radio, either one laid down or one contrived (e.g. when children are not watching)