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Title: Catchment drainage network scaling laws found experimentally in overland flow morphologies
Authors: Cheraghi, Mohsen
Rinaldo, Andrea
Sander, Graham C.
Perona, Paolo
Barry, D. Andrew
Issue Date: 2018
Publisher: American geophysical Union (AGU) © The Authors
Citation: CHERAGHI, M. ... et al, 2018. Catchment drainage network scaling laws found experimentally in overland flow morphologies. Geophysical Research Letters, 45(18), pp. Pages 9614-9622.
Abstract: The scaling relation between the drainage area and stream length (Hack's law), along with exceedance probabilities of drainage area, discharge, and upstream flow network length, is well known for channelized fluvial regions. We report here on a laboratory experiment on an eroding unconsolidated sediment for which no channeling occurred. Laser scanning was used to capture the morphological evolution of the sediment. High-intensity, spatially nonuniform rainfall ensured that the morphology changed substantially over the 16-hr experiment. Based on the surface scans and precipitation distribution, overland flow was estimated with the D8 algorithm, which outputs a flow network that was analyzed statistically. The above-mentioned scaling and exceedance probability relationships for this overland flow network are the same as those found for large-scale catchments and for laboratory experiments with observable channels. In addition, the scaling laws were temporally invariant, even though the network dynamically changed over the course of experiment.
Description: This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Sponsor: Financial support was provided by the Swiss National Science Foundation(200021-144320).
Version: Published
DOI: 10.1029/2018GL078351
URI: https://dspace.lboro.ac.uk/2134/35417
Publisher Link: https://doi.org/10.1029/2018GL078351
ISSN: 0094-8276
Appears in Collections:Published Articles (Architecture, Building and Civil Engineering)

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