Articles | Volume 6, issue 4
Earth Surf. Dynam., 6, 1011–1021, 2018
https://doi.org/10.5194/esurf-6-1011-2018
Earth Surf. Dynam., 6, 1011–1021, 2018
https://doi.org/10.5194/esurf-6-1011-2018

Research article 07 Nov 2018

Research article | 07 Nov 2018

Uniform grain-size distribution in the active layer of a shallow, gravel-bedded, braided river (the Urumqi River, China) and implications for paleo-hydrology

Laure Guerit et al.

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Latest update: 24 Jan 2021
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Short summary
The grain-size distribution of ancient alluvial systems is commonly determined from sections of gravel deposits exposed vertically to reconstruct paleo-environments or changes in tectonics and/or climate. To test whether such a grain-size distribution is equivalent to one of the sediments that was in direct contact with the flow at the time of deposition, we dug a large trench in an active gravel-bedded, braided river. We show that the granulometry is uniform at the scale of the active layer.