Assessing the modulation of outer bank erosion by slump blocks: A case study from Marqu Meadow, China
文献类型：期刊论文
| 作者 | Liu, Lei4,5; Zhu, Lekui5; Chen, Dong4,5; Ran, Qihua3; Tang, Honglei2; Yan, Jun1; Liu, Lin3 |
| 刊名 | GEOMORPHOLOGY
 |
| 出版日期 | 2024-08-01 |
| 卷号 | 458页码:109261 |
| 关键词 | Slump blocks Meandering channels Marqu Meadow Numerical model Bank erosion |
| DOI | 10.1016/j.geomorph.2024.109261 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | The outer bank slump blocks play a fundamental role in modulating the rate of bank erosion, and consequently, have a profound influence on many geomorphic and ecologic processes in meandering streams, e.g., channel evolution and habitat creation. To date, no adequate research has been developed regarding how these blocks, partially strengthened by roots of herbaceous plants, impact the near-bank flow velocity, bank erosion, and migration of streambanks. This paper analyzes 246 slump blocks in a meandering stream on the Marqu Meadow, China. Aerial surveys were conducted once a year from 2018 to 2021 and the lateral migration rates (M) of streambanks are estimated by superimposing the current-year drone imagery onto its previous-year counterpart. When compared to the outer bank segments lacking slumps, our research findings indicate that the bank segments exhibiting slumps demonstrate a reduction of 57 % and 43 % in the maximum and average bank erosion rates, respectively. Overall, the wider blocks provide stronger bank protection; nevertheless, they may also introduce or enhance local scouring in their vicinity, thereby increasing the heterogeneity of bank erosion rates. To elucidate this complex influence mechanism, we simulate the three-dimensional flow velocity field of a similar to 100 m meandering bend containing three slump blocks using the MIKE-3 model. Furthermore, we compare one-year bank migration distance with and without the blocks by correlating the lateral migration distance of outer banks to the longitudinal gradient of near-bank velocity. The paper provides valuable insights into the complex interplay between flow dynamics and streambank behavior in real-world settings, thereby enhancing the effectiveness of future management and restoration practices. |
| WOS关键词 | CHANNEL MIGRATION ; MEANDER MIGRATION ; RIVER ; PLANFORM ; MODEL ; EVOLUTION ; SIMULATION ; TURBULENCE ; STABILITY ; FAILURES |
| WOS研究方向 | Physical Geography ; Geology |
| WOS记录号 | WOS:001248212300001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/205278]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 通讯作者 | Chen, Dong; Ran, Qihua |
| 作者单位 | 1.North China Univ Water Resources & Elect Power, Sch Int Educ, Zhengzhou 450046, Peoples R China 2.Kunming Univ Sci & Technol, Dept Hydraul Power Engn, Kunming 650500, Peoples R China 3.Hohai Univ, Key Lab Hydrol Cycle & Hydrodynam Syst, Minist Water Resources, Nanjing 210098, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Lei,Zhu, Lekui,Chen, Dong,et al. Assessing the modulation of outer bank erosion by slump blocks: A case study from Marqu Meadow, China[J]. GEOMORPHOLOGY,2024,458:109261. |
| APA | Liu, Lei.,Zhu, Lekui.,Chen, Dong.,Ran, Qihua.,Tang, Honglei.,...&Liu, Lin.(2024).Assessing the modulation of outer bank erosion by slump blocks: A case study from Marqu Meadow, China.GEOMORPHOLOGY,458,109261. |
| MLA | Liu, Lei,et al."Assessing the modulation of outer bank erosion by slump blocks: A case study from Marqu Meadow, China".GEOMORPHOLOGY 458(2024):109261. |
入库方式： OAI收割
来源：地理科学与资源研究所
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