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Mikaël Attal

Associate Editor, JGR: Earth Surface

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.

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.

Charts showing relationship between catchment-averaged erosion rate and landscape steepness index
Posted inEditors' Highlights

Meteoric 10Be Reveals Lithological Control on Erosion Rates

by Mikaël Attal 1 June 202026 May 2020

New meteoric 10Be data quantify fast erosion of slates in the Zhuoshui River catchment in Taiwan and demonstrate the influence of lithology on landscape steepness.

Simulated depths around Tuting village
Posted inEditors' Highlights

Enabling Dynamic, Regional-Scale Modelling of Outburst Floods

by Mikaël Attal 7 May 201924 February 2022

The GeoClaw model is used to simulate a landslide-dam outburst flood through rugged Himalayan topography.

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