2024-03-29T10:27:09Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00030463
2023-01-16T04:23:58Z
320:321:322
Modeling of riparian vegetation dynamics and its application to sand-bed river
Toda, Yuji
Zhou, Yuexia
Sakai, Norichika
open access
© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Riparian vegetation
Recruitment
Growth and expansion
Destruction
Bar morphology
A riparian vegetation dynamics model was proposed to consider the mutual influence of hydro-morphology and vegetation dynamics in a sand-bed river. The simulation model consists of four sub-models: river flow and sediment transport, recruitment, growth and expansion, and destruction of vegetation. The numerical simulation was applied to the downstream part of a sand-bed river for predicting the vegetation dynamics over a long period. The model performance is validated by comparison with the field investigation results obtained from analysis of aerial photographs. The simulation results showed that the growth of vegetation starts from the shoreline and the downstream part of sandbars, and the riparian vegetation increases the stability and the relative elevation of the bars. From the good agreements of the temporal tendencies of vegetation recruitment, expansion, and destruction with those obtained from the aerial photographs analysis, the vegetation dynamics model proposed in this study was verified to reproduce the long-term trend of riparian vegetation dynamics fairly well. Finally, the model was applied to different sandbar modes, i.e., alternating bars and multiple bars. The simulation results indicated that the expansion and destruction rates of vegetation show similar tendencies for both bar mode cases, and they were mainly determined by the magnitude of the annual maximum flood. However, the amount of vegetation coverage rate in the alternating bar case was higher than that in the multiple bar case.
ファイル公開日: 2022/05/01
Elsevier
2020-05
eng
journal article
AM
http://hdl.handle.net/2237/00032648
https://nagoya.repo.nii.ac.jp/records/30463
https://doi.org/10.1016/j.jher.2019.09.003
1570-6443
Journal of Hydro-environment Research
30
3
13
https://nagoya.repo.nii.ac.jp/record/30463/files/Revised_manuscript-JHER_2018_387-clean_version.pdf
application/pdf
4.2 MB
2022-05-01