Emergent simplicity despite local complexity in eroding fluvial landscapes

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: 10.1130/G48942.1. This is version 1 of this Preprint.

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Authors

Gareth Roberts 

Abstract

Much understanding of continental topographic evolution is rooted in measuring and predicting rates at which rivers erode. Flume tank and field observations indicate that stochasticity and local conditions play important roles in determining rates at small scales (e.g. < 10 km, thousands of years). Obversely, preserved river profiles and common shapes of rivers atop uplifting topography indicate that erosion rates are predictable at larger scales. These observations indicate that the response of rivers to forcing can be scale dependent. Here I demonstrate that erosional thresholds can provide an explanation for why profile evolution can be very complicated and unique at small scales yet simple and predictable at large scales.

DOI

https://doi.org/10.31223/X5K90S

Subjects

Earth Sciences, Physical Sciences and Mathematics

Keywords

Rivers, Erosion, Threshold

Dates

Published: 2021-06-25 12:49

Last Updated: 2021-06-25 19:49

License

CC BY Attribution 4.0 International

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