Physical modelling of shrub-willow patches in prototype scale

Un Ji, Myeonghui Ahn, Juha Järvelä, Hyungsuk Kim, Eunkyung Jang, Jungeun Gu, Kaisa Västilä

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


Prototype-scale experiments using living plant material are useful in providing a more realistic representation of natural conditions compared to small-scale flume experiments with parts of plants. A major challenge associated with such experiments is the time and effort needed in collecting detailed, representative data on the plant properties. In this study, several alternative methods were tested under field conditions in a channel with two willow patches. Vertical structure of the vegetation in the foliated and unfoliated patches was determined using quartile-layer manual surveys. Photography and image analyses were applied to derive leaf dimensions, and subsequently, estimates for the leaf area index (LAI) and the leaf-to-stem area ratio (AL/AS) for the quartile layers. Terrestrial laser scanning (lidar) was tested to construct a 3D point cloud of the unfoliated patch to compare the results against the quartile-layer manual survey. In addition to the methodological outcomes for deriving vegetation properties, preliminary results on ADV (Acoustic Doppler Velocimeter) data analyses are reported on the vertical velocity distribution within the patches. Overall, it is expected that the observations reported herein are helpful for improved designs of large-scale experiments with natural vegetation.
Original languageEnglish
Title of host publicationProceedings of the 38th IAHR World Congress
EditorsLucas Calvo
PublisherInternational Association for Hydro-Environment Engineering and Research (IAHR)
Number of pages8
Publication statusPublished - 6 Sept 2019
MoE publication typeA4 Conference publication
EventIAHR World Congress - Panama, Panama City, Panama
Duration: 1 Sept 20196 Sept 2019
Conference number: 38

Publication series

NameProceedings of the IAHR World Congress
ISSN (Print)2521-7119
ISSN (Electronic)2521-716X


ConferenceIAHR World Congress
CityPanama City
Internet address


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