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Science News by AGU

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Rivers

Netravati River in Karnataka, India
Posted inNews

A New Index to Quantify River Fragmentation

by Rishika Pardikar 27 April 202227 April 2022

Researchers have developed a new analysis based on a river’s catchment area as opposed its length.

Comparison of channels extracted from a high-resolution Digital Elevation Model using a traditional flow routing method and using the new method based on a Riverlab flow simulation (Elder Creek catchment, California, USA).
Posted inEditors' Highlights

Running Water on Topographic Data to Better Delineate Channels

by Mikaël Attal 25 April 202227 April 2022

Two-dimensional hydraulic simulations are a powerful tool to identify process domains such as channels, hillslopes, and floodplains in high-resolution topographic data.

The Colorado River winds through canyons near Page, Ariz.
Posted inNews

Endangered Rivers Plagued by Pollution, Climate Change, and Outdated Management

by Jennifer Schmidt 19 April 202219 April 2022

The annual list of America’s Most Endangered Rivers includes practical calls to action to turn the tide on threatened U.S. waterways.

A dog sits next to a backpack on a dirt road in a desert landscape.
Posted inFeatures

Incredible Journeys on the Crown of the Continent

by Mary Caperton Morton 15 April 202215 April 2022

Living in Geologic Time: The making, breaking, and backpacking of North America’s Continental Divide.

Satellite image of the Mississippi River near Memphis, Tenn., with a false-color overlay
Posted inScience Updates

A Sharper Look at the World’s Rivers and Catchments

by Bernhard Lehner, Achim Roth, Martin Huber, Mira Anand and Michele Thieme 12 April 202220 April 2022

Digital hydrographic maps have transformed global environmental studies and resource management. A major database update will provide even clearer and more complete views of Earth’s waterways.

Vehicles cross a bridge over the Ravi River in Lahore, Pakistan, at sunset.
Posted inNews

Pharmaceuticals Found in Rivers on All Continents

by Jordan Wilkerson 22 March 202222 March 2022

A quarter of 258 observed rivers had unsafe levels of at least one drug. The findings raise concerns about Earth’s aquatic life and the global threat of antimicrobial resistance.

Photo of gray dirt hill covered with burnt trees.
Posted inNews

Forest Fires Could Boost Western U.S. Water Supplies

by Jennifer Schmidt 21 February 202222 February 2022

Streamflow in the West has been below average since the early 2000s, but a new analysis shows that streams aren’t as dry as expected.

Chicago, Ill., along the shore of Lake Michigan
Posted inNews

Lake Michigan’s Salinity Is on the Rise

by Robin Donovan 7 February 202228 March 2022

Road salt is primarily to blame for the shift, though the water remains within safe levels for now.

An aerial view of an Amazonian landscape, colored by elevation
Posted inResearch Spotlights

How Climate Change Shaped the Amazon’s Land and Life

by Rebecca Dzombak 28 January 202228 January 2022

Ice Age climate swings shaped the equatorial basin’s terrain—and possibly its ecology—faster than previously thought.

Logjam in the Middle Fork Snoqualmie River located in Washington
Posted inNews

From River to Sea: Estimating Wood Cascades

by Carolyn Wilke 21 January 202221 March 2022

Dams and deforestation have chipped away at the millions of cubic meters of wood that flow through rivers and out to sea.

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