Articles | Volume 6, issue 1
Earth Surf. Dynam., 6, 163–185, 2018
Earth Surf. Dynam., 6, 163–185, 2018

Research article 05 Mar 2018

Research article | 05 Mar 2018

Topographical change caused by moderate and small floods in a gravel bed ephemeral river – a depth-averaged morphodynamic simulation approach

Eliisa S. Lotsari et al.

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Cited articles

Acrement, G. J. and Schneider, V. R.: Guide for Selecting Manning's Roughness Coefficients for Natural Channels and Flood Plains, United States Geological Survey Water-Supply Paper, 2339, 1–38, 1984.
An, C., Fu, X., Wang, G., and Parker, G.: Effect of grain sorting on gravel bed river evolution subject to cycled hydrographs: Bed load sheets and breakdown of the hydrograph boundary layer, J. Geophys. Res.-Earth, 122, 1513–1533, 2017a.
An, C., Cui, Y., Fu, X., and Parker, G.: Gravel-bed river evolution in earthquake-prone regions subject to cycled hydrographs and repeated sediment pulses, Earth Surf. Proc. Land., 42, 2426–2438,, 2017b.
Bagnold, R. A.: An Approach to the Sediment Transport Problem from General Physics, Geological Survey Professional Paper 422-I, United States Government Printing Office, Washington, 1966.
Bagnold, R. A.: An empirical correlation of bedload transport rates in flumes and natural rivers, P. Roy. Soc Lond. A Mat., 372, 453–473,, 1980.
Short summary
This paper analyses the timing of topographical changes of a gravel bed ephemeral river channel during consecutive and moderate- and low-magnitude floods by applying a morphodynamic model calibrated with pre- and post-event surveys using RTK-GPS and mobile laser scanning. The channel acted as a braided river during lower flows but as a meandering river during higher flows. The channel changes can be greater during the long-lasting receding phase than during the rising phase of the floods.