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A Novel Framework for Simulating Particle Deposition with Moving Bedforms


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Created: Sep 14, 2021 at 9:13 a.m.
Last updated: Feb 02, 2022 at 8:01 p.m.
DOI: 10.4211/hs.90acd3c1c2754e839e1e12d73154eaff
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Sharing Status: Published
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Abstract

Previous modeling studies of hyporheic exchange induced by moving bedforms have used a Lagrangian frame of reference, typically a simulation domain that moves with an individual bedform. However, that approach is not suitable for simulating the exchange and accumulation of fine particles at a specific location by the migration of a series of bedforms, which commonly occurs in sand-bed streams. Here we present a novel simulation framework that represents mobile bedforms with a moving-interface domain and determines the resulting hyporheic transport using particle tracking. Simulation results successfully reproduce observations of clay deposition in sand beds, and the resulting development of a low-conductivity layer near the scour zone. Increased bedform celerity and filtration both lead to shallower depth of clay deposition, and a more compact deposition layer. While increased filtration causes more clay to deposit, increased celerity reduces deposition by flattening hyporheic exchange flowpaths.

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How to Cite

Teitelbaum, Y. (2022). A Novel Framework for Simulating Particle Deposition with Moving Bedforms, HydroShare, https://doi.org/10.4211/hs.90acd3c1c2754e839e1e12d73154eaff

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http://creativecommons.org/licenses/by/4.0/
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