Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025514 |
The Role of Collapsed Bank Soil on Tidal Channel Evolution: A Process-Based Model Involving Bank Collapse and Sediment Dynamics | |
Zhao, K.1; Gong, Z.1,2; Xu, F.3; Zhou, Z.1; Zhang, C. K.1; Perillo, G. M. E.4,5; Coco, G.6 | |
2019-11-14 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | Peoples R China; Argentina; New Zealand |
英文摘要 | We develop a process-based model to simulate the geomorphodynamic evolution of tidal channels, considering hydrodynamics, flow-induced bank erosion, gravity-induced bank collapse, and sediment dynamics. A stress-deformation analysis and the Mohr-Coulomb criterion, calibrated through previous laboratory experiments, are included in a model simulating bank collapse. Results show that collapsed bank soil plays a primary role in the dynamics of bank retreat. For bank collapse with small bank height, tensile failure in the middle of the bank (Stage I), tensile failure on the bank top (Stage II), and sectional cracking from bank top to the toe (Stage III) are present sequentially before bank collapse occurs. A significant linear relation is observed between bank height and the contribution of bank collapse to bank retreat. Contrary to flow-induced bank erosion, bank collapse prevents further widening since the collapsed bank soil protects the bank from direct bank erosion. The bank profile is linear or slightly convex, and the planimetric shape of tidal channels (gradually decreasing in width landward) is similar when approaching equilibrium, regardless of the consideration of bank erosion and collapse. Moreover, the simulated width-to-depth ratio in all runs is comparable with observations from the Venice Lagoon. This indicates that the equilibrium configuration of tidal channels depends on hydrodynamic conditions and sediment properties, while bank erosion and collapse greatly affect the transient behavior (before equilibrium) of the tidal channels. Overall, this contribution highlights the importance of collapsed bank soil in investigating tidal channel morphodynamics using a combined perspective of geotechnics and soil mechanics. |
英文关键词 | tidal channels bank collapse numerical modeling collapsed bank soil |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000496483300001 |
WOS关键词 | SEEPAGE EROSION ; SALT MARSHES ; EQUILIBRIUM ; STABILITY ; RETREAT ; MORPHODYNAMICS ; CONSOLIDATION ; MIGRATION ; GEOMETRY ; FAILURES |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/223896 |
专题 | 资源环境科学 |
作者单位 | 1.Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing, Jiangsu, Peoples R China; 2.Hohai Univ, Jiangsu Key Lab Coast Ocean Resources Dev & Envir, Nanjing, Jiangsu, Peoples R China; 3.East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai, Peoples R China; 4.Consejo Nacl Invest Cient & Tecn, Inst Argentino Oceanog, Bahia Blanca, Buenos Aires, Argentina; 5.UNS, Bahia Blanca, Buenos Aires, Argentina; 6.Univ Auckland, Sch Environm, Auckland, New Zealand |
推荐引用方式 GB/T 7714 | Zhao, K.,Gong, Z.,Xu, F.,et al. The Role of Collapsed Bank Soil on Tidal Channel Evolution: A Process-Based Model Involving Bank Collapse and Sediment Dynamics[J]. WATER RESOURCES RESEARCH,2019. |
APA | Zhao, K..,Gong, Z..,Xu, F..,Zhou, Z..,Zhang, C. K..,...&Coco, G..(2019).The Role of Collapsed Bank Soil on Tidal Channel Evolution: A Process-Based Model Involving Bank Collapse and Sediment Dynamics.WATER RESOURCES RESEARCH. |
MLA | Zhao, K.,et al."The Role of Collapsed Bank Soil on Tidal Channel Evolution: A Process-Based Model Involving Bank Collapse and Sediment Dynamics".WATER RESOURCES RESEARCH (2019). |
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