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Aerial view of the Pemali delta in Indonesia
Posted inNews

Why Do Rivers Jump Off the Beaten Path?

by Carolyn Wilke 21 June 2022

Researchers sifted through 50 years of satellite imagery and came up with new clues to where and why rivers avulse, suddenly changing their course.

A landscape with landslides along a steep mountain slope
Posted inResearch Spotlights

Steep Mountain Slopes Have Surprisingly Long Lifetimes

by Rebecca Dzombak 14 June 2022

New models of eastern Tibetan hillsides show that steep slopes with “excess” rock last longer on average than their shallower counterparts.

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.

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 20221 June 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.

Maps of debris flow similarity index (DFSI) and the corresponding lengths of those debris flow channel segments.
Posted inEditors' Highlights

Debris Flows Keep the Landscape on the Straight and Narrow

by Adam Booth 6 April 20223 May 2022

New methods for identifying debris flow-shaped channels improve hazard quantification and highlight how high uplift rates and fractured bedrock facilitate debris flow-dominated landscape evolution.

Images showing sediment remobilized after the 2008 Wenchuan earthquake, China.
Posted inEditors' Highlights

Moving Earthquake-Generated Sediment Through a Landscape

by Amy E. East 30 March 202229 June 2022

Ten years after the Wenchuan earthquake, most of the new sediment it produced remained on the landscape, indicating a long recovery time.

Posted inEditors' Highlights

What Caused the Open Habitat Transition in the West-Central U.S.?

by Susan Trumbore 10 March 202212 April 2022

Between 26-15 My ago, forests covering west-central North America gave way to open, grassy habitats. Now, oxygen isotope records suggest this shift is owed to drier winters and increased aridity.

Dry Falls located at the head of Grand Coulee
Posted inResearch Spotlights

Western U.S. “Megafloods” Might Not Have Been So Mega

by Rebecca Dzombak 3 February 20223 February 2022

The flooding that carved eastern Washington State 20,000 to 12,000 years ago could have been 80% smaller than the canyons’ volume today.

Aerial view of snowcapped Mount Hood with lower-lying mountains and fog in the background
Posted inScience Updates

Making the Most of Volcanic Eruption Responses

by T. P. Fischer, S. C. Moran, K. M. Cooper, D. C. Roman and P. C. LaFemina 31 August 202122 March 2022

Last year, a new collaborative initiative conducted a hypothetical volcano response exercise. A month later, they put the knowledge gained to use during an actual eruption.

Four photographs of Big Cypress National Preserve of South Florida.
Posted inEditors' Highlights

A New Model for Self-Organized Pattern Formation

by T. A. J. F. Hoitink 1 July 202111 February 2022

Scale-dependent feedbacks in time, rather than in space, result in a new type of competition, explaining the regularly patterned landscape of Big Cypress National Preserve in South Florida.

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