River delta
hideA delta is a landform that is created at the mouth of a river where that river flows into an ocean, sea, estuary, lake, reservoir, flat arid area, or another river. Deltas are formed from the deposition of the sediment carried by the river as the flow leaves the mouth of the river. Over long periods of time, this deposition builds the characteristic geographic pattern of a river delta.
Herodotus the great historian coined the term delta for the Nile River delta because the sediment deposited at its mouth had the shape of the upper-case Greek letter Delta: Δ.
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News tagged with river delta
Diverting Sediment-rich Water Below New Orleans Could Lead to Extensive New Land
Oct 20, 2009 |
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(PhysOrg.com) -- Diverting sediment-rich water from the Mississippi River below New Orleans could generate new land in the river's delta in the next century.
Research gives glimpse of tectonic history on Puget Sound-region fault zones
Space & Earth / Earth Sciences
Oct 19, 2009 |
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(PhysOrg.com) -- New research on the Kitsap Peninsula, at the west edge of Washington state's Puget Sound, finds evidence that land was raised at least 6 feet by ancient earthquakes.
World's river deltas sinking due to human activity, says new study
Space & Earth / Earth Sciences
Sep 20, 2009 |
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A new study led by the University of Colorado at Boulder indicates most of the world's low-lying river deltas are sinking from human activity, making them increasingly vulnerable to flooding from rivers and ...
Scientists assess flooding and damage from 2008 Myanmar cyclone
Space & Earth / Earth Sciences
Jul 17, 2009 |
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Tropical cyclone Nargis made landfall in the Asian nation of Myanmar on May 2, 2008, causing the worst natural disaster in the country's recorded history - with a death toll that may have exceeded 138,000. ...
Scientist discovers beavers building prime salmon habitat in Skagit Delta
May 24, 2009 |
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As sometimes happens with science, Greg Hood went looking for one thing, and found something else: tidal beavers.
Arctic river deltas may hold clues to future global climate
Space & Earth / Earth Sciences
May 18, 2009 |
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Scientists struggling to understand how Earth's climate will change in the next few decades have neglected a potential treasure trove of information—sediments deposited in the ocean by major Arctic rivers such as the Colville ...
River delta areas can provide clue to environmental changes
May 11, 2009 |
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Sediments released by many of the world's largest river deltas to the global oceans have been changed drastically in the last 50 years, largely as a result of human activity, says a Texas A&M University researcher who emphasizes ...
