A NOVEL FRAMEWORK FOR SIMULATING PARTICLE DEPOSITION WITH MOVING BEDFORMS
Loading...
Date
2022
Authors
Teitelbaum, Yoni
Shimony, Tomer
Cifuentes, Edwin Saavedra
Dallmann, Jonathan
Phillips, Colin B.
Packman, Aaron I.
Hansen, Scott K.
Arnon, Shai
Journal Title
Journal ISSN
Volume Title
Publisher
Geophysical Research Letters
Abstract
Previous modeling studies of hyporheic exchange induced by moving bedforms have used a
moving reference frame, typically corresponding to an individual moving bedform. However, this approach is
not suitable for simulating the exchange and accumulation of immobile fine particles beneath moving bedforms,
which commonly occurs in sand-bed streams, as both moving and stationary features must be considered. Here
we present a novel simulation framework that may represent arbitrarily shaped, generally aperiodic mobile
bedforms within a stationary reference frame. We combine this approach with particle tracking to successfully
reproduce observations of clay deposition in sand beds, and the resulting development of a low-conductivity
layer near the scour zone. We find that increased bedform celerity and filtration both lead to a 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
Description
Keywords
moving bedforms, Type of access: Open Access
Citation
Teitelbaum, Y., Shimony, T., Saavedra Cifuentes, E., Dallmann, J., Phillips, C. B., Packman, A. I., Hansen, S. K., & Arnon, S. (2022). A Novel Framework for Simulating Particle Deposition With Moving Bedforms. Geophysical Research Letters, 49(4). https://doi.org/10.1029/2021gl097223