EVALUATION OF THRESHOLD-BASED MODELS TO ACCOUNT FOR SURFACE MOISTURE IN MESO-SCALE AEOLIAN SEDIMENT TRANSPORT SIMULATIONS

CAROLINE HALLIN, CHRISTA VAN IJZENDOORN, JANELLE SKADEN, SIERD DE VRIES

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

Abstract

Aeolian transport rates decreases during wet conditions as the threshold shear velocity for initiation of transport increases over moist sand. This study investigates the influence of surface moisture on meso-scale aeolian transport simulations. Yearly transport rates towards the dunes are simulated with ten different threshold-based models to account for moisture effects. The ten models show large variability when comparing the wet threshold shear velocities for a range of surface moisture conditions. However, for yearly simulations of aeolian transport towards the dunes, all models resulted in similar transport rates, which were considerably lower than simulations not accounting for moisture effects. The results suggest that in meso-scale aeolian sediment transport simulations, accurate predictions of surface moisture are more important than the selection of threshold-based models.
Original languageEnglish
Title of host publicationCoastal Sediments 2023
Subtitle of host publicationThe Proceedings of the Coastal Sediments 2023 In 5 Volumes
PublisherWorld Scienctific
Pages670-683
DOIs
Publication statusPublished - Apr 2023
Externally publishedYes

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