Vegetation‐Generated Turbulence Does Not Impact the Erosion of Natural Cohesive Sediment
Name
Geophysical Research Letters - 2024 - Deitrick - Vegetation‐Generated Turbulence Does Not Impact the Erosion of Natural.pdf
Description
Published version
Size
668.91 KB
Format
Adobe PDF
Checksum (MD5)
88300fdbebd94b55bcae1c353b00fb84
Author(s)
Deitrick, Autumn R
Ralston, David K
Esposito, Christopher R
Baustian, Melissa M
Burgos, Maricel Beltrán
Courtois, Andrew J
Nepf, Heidi
Date Issued
July 10, 2024
Journal
Geophysical Research Letters
Publisher
American Geophysical Union
Citation
Deitrick, A. R., Ralston, D. K., Esposito, C. R., Baustian, M. M., Burgos, M. B., Courtois, A. J., & Nepf, H. (2024). Vegetation-generated turbulence does not impact the erosion of natural cohesive sediment. Geophysical Research Letters, 51, e2024GL109730.
Version
Final published version
Abstract
Previous studies have demonstrated that vegetation‐generated turbulence can enhance erosion rate and reduce the velocity threshold for erosion of non‐cohesive sediment. This study considered whether vegetation‐generated turbulence had a similar influence on natural cohesive sediment. Cores were collected from a black mangrove forest with aboveground biomass and exposed to stepwise increases in velocity. Erosion was recorded through suspended sediment concentration. For the same velocity, cores with pneumatophores had elevated turbulent kinetic energy compared to bare cores without pneumatophores. However, the vegetation‐generated turbulence did not increase bed stress or the rate of resuspension, relative to bare cores. It was hypothesized that the short time‐scale fluctuations associated with vegetation‐generated turbulence were not of sufficient duration to break cohesion between grains, explaining why elevated levels of turbulence associated with the pneumatophores had no impact on the erosion threshold or rate.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Joint Program in Oceanography/Applied Ocean Science and Engineering
Woods Hole Oceanographic Institution. Department of Applied Ocean Physics and Engineering.
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivatives
Persistent DSpace Link
DOI of Published Version
10.1029/2024gl109730
