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   Stark, N. and ( October 2021 , Proceedings of the 10th International Conference on Scour and Erosion (ICSE-10))
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   https://doi.org/10.1002/2017JG003943  

   Kim, Kyra H. ; Heiss, James W. ; Michael, Holly A. ; Cai, Wei-Jun ; Laattoe, Tariq ; Post, Vincent E. ; Ullman, William J. ( October 2017 , Journal of Geophysical Research: Biogeosciences)
3. Microstructural differences between naturally-deposited and laboratory beach sands

   https://doi.org/10.1007/s10035-021-01169-4  

   Ferrick, Amy ; Wright, Vanshan ; Manga, Michael ; Sitar, Nicholas ( February 2022 , Granular Matter)

   Abstract The orientation of, and contacts between, grains of sand reflect the processes that deposit the sands. Grain orientation and contact geometry also influence mechanical properties. Quantifying and understanding sand microstructure thus provide an opportunity to understand depositional processes better and connect microstructure and macroscopic properties. Using x-ray computed microtomography, we compare the microstructure of naturally-deposited beach sands and laboratory sands created by air pluviation in which samples are formed by raining sand grains into a container. We find that naturally-deposited sands have a narrower distribution of coordination number (i.e., the number of grains in contact) and a broader distribution of grain orientations than pluviated sands. The naturally-deposited sand grains orient inclined to the horizontal, and the pluviated sand grains orient horizontally. We explain the microstructural differences between the two different depositional methods by flowing water at beaches that re-positions and reorients grains initially deposited in unstable grain configurations. 

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4. No lines in the sand: Impacts of intense mechanized maintenance regimes on sandy beach ecosystems span the intertidal zone on urban coasts

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5. Heterogeneity Affects Intertidal Flow Topology in Coastal Beach Aquifers

   https://doi.org/10.1029/2020GL089612  

   Geng, Xiaolong ; Michael, Holly A. ; Boufadel, Michel C. ; Molz, Fred J. ; Gerges, Firas ; Lee, Kenneth ( August 2020 , Geophysical Research Letters)

   Intertidal aquifers are hotspots of biogeochemical cycling where nutrients and contaminants are processed prior to discharge to the ocean. The nature of the dynamic subsurface mixing zone is a critical control on mitigating reactions. Simulation of density‐dependent, variably saturated flow and salt transport incorporating realistic representations of aquifer heterogeneity was conducted within a Monte Carlo framework to investigate influence of nonuniform permeability on intertidal groundwater flow and salt transport dynamics. Results show that heterogeneity coupled with tides creates transient preferential flow paths within the intertidal zone, evolving multiple circulation cells and fingering‐type salinity distributions. Due to heterogeneity, strain‐dominated (intense mixing) and vorticity‐dominated (low mixing) flow regions coexist at small spatial scales, and their spatial extent reaches peaks at high tide and low tide. Such topological characteristics reveal complex tempo‐spatial mixing patterns for intertidal flow with localized areas of high and low mixing intensities, which have implications for intertidal biogeochemical processing.

    

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