[ UK /wˈɔːtəʃˌɛd/ ]
[ US /ˈwɑtɝˌʃɛd, ˈwɔtɝˌʃɛd/ ]
  1. a ridge of land that separates two adjacent river systems
  2. the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet
    flood control in the Missouri basin
  3. an event marking a unique or important historical change of course or one on which important developments depend
    the agreement was a watershed in the history of both nations
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How To Use watershed In A Sentence

  • Much of this additional nitrogen is retained or denitrified in the watershed, but a substantial amount enters groundwater and rivers and eventually is delivered to estuaries and the ocean.
  • Finally, man-made ditches, as well as existing bayous, sloughs, and streams in the St. Francis Watershed, provide suitable habitat for P. capax.
  • It slopes southwest from the watershed between the Nile and Congo rivers, part of an ancient peneplain interrupted by mostly granitic inselbergs, threaded by gallery forests, with large marshland depressions. Garamba National Park, Democratic Republic of Congo
  • Geography—note: landlocked; straddles crest of the Nile-Congo watershed; the Kagera, which drains into Lake Victoria, is the most remote headstream of the White Nile Burundi
  • Liddell believes the institutes were a watershed moment for nonreligious participation in the interfaith movement. Chris Stedman: Atheist Students Find Their Place in the Interfaith Movement
  • The 1932 election represented a watershed in American politics.
  • During this period of joint occupation in the Columbia River watershed, neither Great Britain nor the United States had a governmental representative in the area.
  • It is the largest river between the great Niger and Congo rivers, and its watershed drains the whole of Gabon.
  • At current rates of sprawl, 25 percent of the nation's coastal watersheds will be urbanized by 2025.
  • Since so little was known of the species' ecology or distribution, work concentrated in the central piedmont, especially the Broad River watershed.
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