Bed-load transport in vegetated flows : phenomena, parametrization, and prediction
This study presents an experimental study on bed-load transport in the presence of emergent vegetation, which is simulated using uniformly sized circular cylinders arranged in a homogeneous distribution. The spatial variability of bed-load fluxes in vegetated flows is first examined. Then a model is...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/153675 |
| _version_ | 1826120416876298240 |
|---|---|
| author | Wu, Haoliang Cheng, Nian-Sheng Chiew, Yee-Meng |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Wu, Haoliang Cheng, Nian-Sheng Chiew, Yee-Meng |
| author_sort | Wu, Haoliang |
| collection | NTU |
| description | This study presents an experimental study on bed-load transport in the presence of emergent vegetation, which is simulated using uniformly sized circular cylinders arranged in a homogeneous distribution. The spatial variability of bed-load fluxes in vegetated flows is first examined. Then a model is proposed for evaluating the bed-load transport rate based on the scour holes that form around the vegetation stems. The influences of spatial variability and intensified turbulence on sediment transport are finally considered by relating the dimensionless transport rate and flow intensity to the stem size and vegetation density. The derived formula for predicting the bed-load transport rate in vegetated flows is applicable for weak to moderate transport conditions. |
| first_indexed | 2024-10-01T05:16:07Z |
| format | Journal Article |
| id | ntu-10356/153675 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:16:07Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1536752022-01-07T05:34:58Z Bed-load transport in vegetated flows : phenomena, parametrization, and prediction Wu, Haoliang Cheng, Nian-Sheng Chiew, Yee-Meng School of Civil and Environmental Engineering Engineering::Civil engineering Incipient Motion Sediment This study presents an experimental study on bed-load transport in the presence of emergent vegetation, which is simulated using uniformly sized circular cylinders arranged in a homogeneous distribution. The spatial variability of bed-load fluxes in vegetated flows is first examined. Then a model is proposed for evaluating the bed-load transport rate based on the scour holes that form around the vegetation stems. The influences of spatial variability and intensified turbulence on sediment transport are finally considered by relating the dimensionless transport rate and flow intensity to the stem size and vegetation density. The derived formula for predicting the bed-load transport rate in vegetated flows is applicable for weak to moderate transport conditions. Nanyang Technological University Published version The first author would gratefully acknowledge the financial support from the NTU Research Scholarship. The authors would also gratefully acknowl-edge the financial support from the National Natural Science Foundation of China (Grant No. 51979242) and tech-nical support from State Key Laboratory of Hydraulics and Mountain River Engineering at Sichuan University. 2022-01-07T05:34:58Z 2022-01-07T05:34:58Z 2021 Journal Article Wu, H., Cheng, N. & Chiew, Y. (2021). Bed-load transport in vegetated flows : phenomena, parametrization, and prediction. Water Resources Research, 57(4), e2020WR028143-. https://dx.doi.org/10.1029/2020WR028143 0043-1397 https://hdl.handle.net/10356/153675 10.1029/2020WR028143 2-s2.0-85104844463 4 57 e2020WR028143 en Water Resources Research © 2021 American Geophysical Union. All Rights Reserved. This paper was published in Water Resources Research and is made available with permission of American Geophysical Union. application/pdf |
| spellingShingle | Engineering::Civil engineering Incipient Motion Sediment Wu, Haoliang Cheng, Nian-Sheng Chiew, Yee-Meng Bed-load transport in vegetated flows : phenomena, parametrization, and prediction |
| title | Bed-load transport in vegetated flows : phenomena, parametrization, and prediction |
| title_full | Bed-load transport in vegetated flows : phenomena, parametrization, and prediction |
| title_fullStr | Bed-load transport in vegetated flows : phenomena, parametrization, and prediction |
| title_full_unstemmed | Bed-load transport in vegetated flows : phenomena, parametrization, and prediction |
| title_short | Bed-load transport in vegetated flows : phenomena, parametrization, and prediction |
| title_sort | bed load transport in vegetated flows phenomena parametrization and prediction |
| topic | Engineering::Civil engineering Incipient Motion Sediment |
| url | https://hdl.handle.net/10356/153675 |
| work_keys_str_mv | AT wuhaoliang bedloadtransportinvegetatedflowsphenomenaparametrizationandprediction AT chengniansheng bedloadtransportinvegetatedflowsphenomenaparametrizationandprediction AT chiewyeemeng bedloadtransportinvegetatedflowsphenomenaparametrizationandprediction |