Browsing by Author "Hassan, Marwan A."
Now showing items 1-13 of 13
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A model based on Hirano-Exner equations for two-dimensional transient flows over heterogeneous erodible beds
(Elsevier, 2016-01)
Article
Open AccessIn order to study the morphological evolution of river beds composed of heterogeneous material, the interaction among the different grain sizes must be taken into account. In this paper, these equations are combined with ... -
Channel adjustments to a succession of water pulses in gravel bed rivers
(2015-11)
Article
Open AccessGravel bed rivers commonly exhibit a coarse surface armor resulting from a complex history of interactions between flow and sediment supply. The evolution of the surface texture under single storm events or under steady ... -
Co-evolution of coarse grain structuring and bed roughness in response to episodic sediment supply in an experimental aggrading channel
(2020-03)
Article
Open AccessWe use flume experiments to better understand how gravel-bed channels maintain bed surface stability in response to pulses of sediment supply. Bed elevations and surface imagery at high spatial resolutions were used to ... -
Coupling between downstream variations of channel width and local pool–riffle bed topography
(2023-01-04)
Article
Open AccessA potential control of downstream channel width variations on the structure and planform of pool–riffle sequence local bed topography is a key to the dynamics of gravel bed rivers. How established pool–riffle sequences ... -
Effect of stress history on sediment transport and channel adjustment in graded gravel-bed rivers
(European Geosciences Union (EGU), 2021-04)
Article
Open AccessWith the increasing attention on environmental flow management for the maintenance of habitat diversity and ecosystem health of mountain gravel-bed rivers, much interest has been paid to how inter-flood low flow can affect ... -
Experimental insights into the threshold of motion in alluvial channels: sediment supply and streambed state
(American Geophysical Union (AGU), 2020-12)
Article
Open AccessFlume experiments were conducted to understand the role of episodic sediment supply on the threshold of motion, streambed state, and stability in gravel bed channels. We demonstrate the importance of bed surface evolution ... -
Experiments on the sediment transport along pool-riffle unit
(2022-09)
Article
Open AccessThis study examines channel dynamics and mixed-load bed load transport through a riffle and pool sequence forced by downstream channel width variations within an experimental flume. The experiment consisted of four runs ... -
Influence of the sediment supply texture on morphological adjustments in gravel-bed rivers
(2014-11)
Article
Open AccessThe role played by the texture of the sediment supply on channel bed adjustments in gravel-bed rivers is poorly understood. To address this issue, an experimental campaign has been designed. Flume experiments lasting 96 h ... -
Modelo matemático para cuantificar el sedimento acumulado en tramos de río con presas de madera
(Centro Ibérico de Restauración Fluvial, 2019)
Conference lecture
Restricted access - publisher's policyLos troncos en cauces de cuencas forestadas son elementos clave (e intrínsecos) que contribuyen a configurar la morfología de estos ríos. A menudo, estos troncos se acumulan formando barreras que, además de modificar la ... -
Morphodynamics of a width-variable gravel bed stream: new insights on pool-riffle formation from physical experiments
(American Geophysical Union (AGU), 2018-11)
Article
Open AccessField observations, experiments, and numerical simulations suggest that pool-riffles along gravel bed mountain streams develop due to downstream variations of channel width. Where channels narrow, pools are observed, and ... -
Principles of bedload transport of non-cohesive sediment in open-channels
(Springer, 2015)
Part of book or chapter of book
Restricted access - publisher's policyThis text addresses the particular case of motion and causes of motion of granular material as bedload in the fluvial domain. The aim is to perform and overview of key concepts, main achievements and recent advances on the ... -
Sediment transport and channel morphology implications for fish habitat
(CRC Press, 2017)
Part of book or chapter of book
Restricted access - publisher's policyThis chapter reviews the basic principles of sediment transport in streams, channel classification, mountain channel morphology, and associated implications for fish spawning habitats. Local sediment transport processes ... -
Temporal bed adjustments to a series of water pulses in gravel bed rivers
(CRC Press, 2014)
Conference report
Restricted access - publisher's policyThe evolution of the bed surface and bedload transport rates under a sudden increase of the water discharge (pulse) has been relatively unexplored in an experimental setup. Further, no systematic investigation has been ...
