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Sediment transport

On the left is a schematic illustrating the model setup in an idealized rectangular channel. On the right is a contour plot of predicted ratio of lateral erosion rate to vertical erosion rate as a function of transport stage and relative sediment supply.
Posted inEditors' Highlights

Impacts by Moving Gravel Cause River Channels to Widen or Narrow

by Mikaël Attal 24 September 202128 September 2021

A new analytical model describes how the amount and grain size of sediment transported by rivers influences bedrock channel width, which can be used to predict where rivers will widen or narrow.

Photographs of different environments in which sediment transport occurs: a river, the coast, and sand dunes.
Posted inEditors' Vox

From Blowing Wind to Running Water: Unifying Sediment Transport

by Thomas Pähtz, A. H. Clark, M. Valyrakis and O. Durán 18 May 202028 September 2021

Laboratory experiments and grain-scale computer simulations during the past decade have led to a more universal understanding of flow-driven sediment transport across flows in oil, water, and air.

Layers of sediment are exposed on a hillslope in the Bighorn Basin of Wyoming.
Posted inResearch Spotlights

Tracing the Past Through Layers of Sediment

by Aaron Sidder 1 May 202029 September 2021

Signals in layers of sedimentary rock hint at climates and ecosystems come and gone. Understanding this history can help us forecast the future, but challenges abound.

An illustration showing microscopic colloidal particles adhered to sand grains in an aquifer from which groundwater is being pumped to the surface via a well.
Posted inResearch Spotlights

Treating Colloids as Clusters Better Predicts Their Behavior

by Terri Cook 25 July 2019

New research suggests that an accurate prediction of colloidal particle mobilization in the environment should account for the effect of clustering.

Researchers recreate streams in the lab to study sediment pulses
Posted inResearch Spotlights

How Are Sediment Pulses Generated?

by Terri Cook 24 July 2018

A new long-term flume experiment shows that bed load gravel travels downstream in recurring, 10-hour pulses even when water flow and sediment supply are constant.

Posted inEditors' Vox

On Integrating Sedimentology and Hydrogeology in Streambeds

by D. Partington, C. T. Simmons, R. Therrien and P. Brunner 27 April 2018

A new modeling blueprint seeks to unify sedimentology, hydrology, and hydrogeology in the modeling of streambeds.

Researchers predict the movement of sediment in very steep streams.
Posted inResearch Spotlights

Boulders Limit Transport of Sand and Gravel in Steep Rivers

by A. Branscombe 6 January 201710 February 2017

Mountain rivers and streams actively reshape landscapes by eroding material from uplands and depositing it in lowlands. Scientists can now predict this transport in very steep streams.

This photo shows Jishi Gorge upstream from the landslide dam. Gray silt deposits reveal an ancient, massive lake held by the dam.
Posted inNews

Evidence Found for China's Ancient Origin Story

by JoAnna Wendel 4 August 20167 September 2016

New geological findings suggest that an ancient flood in a popular legend about the birth of China's civilization might have actually occurred, but some 150 years later than historians thought.

Posted inResearch Spotlights

How Sediment Transport Sways Wetland Stability

by L. Strelich 17 February 201617 February 2016

Scientists examine the role of variables like tides and suspended sediment concentration to improve methods of evaluating coastal wetlands and how they may respond to future sea level rise.

Features from AGU Journals

RESEARCH SPOTLIGHTS
JGR: Solid Earth
“New Tectonic Plate Model Could Improve Earthquake Risk Assessment”
By Morgan Rehnberg

EDITORS' HIGHLIGHTS
AGU Advances
“Eminently Complex – Climate Science and the 2021 Nobel Prize”
By Ana Barros

EDITORS' VOX
Perspectives of Earth and Space Scientists
“New Directions for Perspectives of Earth and Space Scientists”
By Michael Wysession


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