Wind turbulence effects on dune sand transport

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

This study involved field experiment of instantaneous wind velocity, angle, and aeolian sand flux on a coastal dune and numerical simulation of spatial wind fields to analyze the effects of wind turbulence on aeolian sand transport. The field data demonstrate that horizontal turbulence intensity is approximated by a power equation of mean horizontal wind velocity and has a negative relationship with the mean wind velocity in various wind conditions. Horizontal turbulence intensity also has a negative relationship with the aeolian sand flux in various wind conditions, indicating the potential for introducing the turbulence intensity into the aeolian sand transport equation. The wind field simulated with a large eddy simulation (LES) model has reasonable wind characteristics consistent with ground elevation change measured in the field. However, results indicate accurate simulation of vertical wind velocity and both horizontal and vertical turbulence intensity is a great challenge compared to simulation of horizontal velocity.

Original languageEnglish
Pages (from-to)333-337
Number of pages5
JournalJournal of Coastal Research
Volume1
Issue number75
DOIs
Publication statusPublished - 2016 Mar 1
Event14th International Coastal Symposium, ICS 2016 - Sydney, Australia
Duration: 2016 Mar 62016 Mar 11

Keywords

  • LES
  • Sand transport rate
  • Sediment transport
  • Turbulence intensity
  • UD-101

ASJC Scopus subject areas

  • Ecology
  • Water Science and Technology
  • Earth-Surface Processes

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