@inproceedings{9d6bf2d59fd042b6b5bbf300cd7e908b,
title = "THE EFFECTS OF VEGETATION HEIGHT AND DENSITY ON FLOW AND TURBULENCE WITHIN AND BEHIND A PATCH OF VEGETATION",
abstract = "Coastal vegetation often grows in spatially distributed patches. However, detailed measurements of mean and turbulent flows accounting for such spatial heterogeneity are rare. We present measurements from manipulative experiments in the field by creating artificial patches of vegetation mimics with varied vegetation density and height. We found that: (1) an increase in vegetation density substantially reduces flow velocity and turbulent kinetic energy (TKE) within a patch, and (2) an increase in vegetation height induced a contrasting effect, causing faster flows and greater TKE within the patch, especially for a dense patch. The same trend was obtained in numerical hydrodynamic simulations. Elevated TKE was observed behind dense vegetation patches, due to large-scale turbulence created by Kelvin-Helmholtz instability, compared to lower TKE behind sparser patches. These results suggest that vegetation height and density create diverse spatial patterns in TKE around patches, while inducing contrasting effects on flow and turbulence within patches.",
keywords = "coastal vegetation, field measurement, turbulence, vegetation patch",
author = "Masaya Yoshikai and Mullarney, \{Julia C.\} and Vinay Nelli and R{\'e}mi Chassagne and William Nardin and Tinoco, \{Rafael O.\}",
note = "This research is funded by the Royal Society of New Zealand{\textquoteright} Marsden Fund (grant 20-UOW-030). We thank Ben Roche and Deonie Castle for their assistance with the field experiments.; Book of Extended Abstracts of the 41st IAHR World Congress, 2025 ; Conference date: 22-06-2025 Through 27-06-2025",
year = "2025",
language = "English (US)",
isbn = "9789083558950",
series = "Proceedings of the IAHR World Congress",
publisher = "International Association for Hydro-Environment Engineering and Research",
pages = "1576--1577",
editor = "\{Wing-Keung Law\}, Adrian and Er, \{Jenn Wei\}",
booktitle = "Book of Extended Abstracts of the 41st IAHR World Congress, 2025",
}