Quantification of suspended load, sinks and sources for a sediment budget of the German river Rhine

Gehres, Nicole; Brandstetter, Barbara; Hillebrand, Gudrun; Vollmer, Stefan; Banhold, K; Frings, Roy M.; Schüttrumpf, Holger

doi:10.1201/b17133-130

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Dune Analysis Methods1

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2022

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“…This method relies on the assumption that between two measurements in time the bed elevation profile is shifted downstream, while the shape of the dunes remains relatively constant (Ten Brinke et al., 1999). To delete spurious results, the maximum displacement was capped at the mean length of the dunes (Gehres et al., 2013). The dune celerity was determined by dividing the displacement over the time interval in days between the two measurements.…”

Section: Dune Analysis Methodsmentioning

confidence: 99%

River Dune Dynamics During Low Flows

Lokin

Warmink

Bomers

et al. 2022

Geophysical Research Letters

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River dunes are dynamic and periodic bedforms in sand and gravel bed rivers, which propagate in a streamwise direction. Understanding of river dune dynamics is essential for river management. Dune shape, in combination with celerity, is a proxy for sediment transport (McElroy & Mohrig, 2009;Zomer et al., 2021), which is an important quantity to calibrate morphological models. Such models can support dredging operations to enable safe navigation. Little is known about dune dynamics during low flows due to a focus on dune dynamics during high flows (Julien & Klaassen, 1995;Wilbers, 2003) for roughness and water level predictions (Naqshband et al., 2017; van Duin et al., 2017). Low flow is defined by a sediment transport capacity just above the threshold of motion.River dune dynamics have been studied by a wide range of methods: flume experiments (

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Section: Dune Analysis Methodsmentioning

confidence: 99%