Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL094622 |
Evaluation of Morphodynamic Controls on the Preservation of Fluvial Meander-belt Deposits | |
N. Yan; L. Colombera; N. P. Mountney | |
2021-08-06 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | The way river morphodynamics influence the preservation of point-bar deposits at multiple scales is not fully understood. Employing time-lapse trajectories of natural rivers, a numerical model is used here to simulate planform evolutions of meander-belt reaches that embody different transformation behaviors and cutoff processes. Proxies for temporal durations are obtained considering the surface area over which a river migrated and channel migration rates that relate to average channel radius of curvature through constant, monotonic and non-monotonic relationships. The preservation of meander-belt deposits over different timescales is assessed at three architectural hierarchies: (i) pairs and (ii) sets of accretion packages, and (iii) meander-belts. Results confirm that sediment preservation decreases in a predictable way with the accumulation time; however, accretion rates decay with time in a way that does not follow the expected power-law. This is interpreted to reflect the effect of the onset of geomorphic thresholds of channel transformation and cutoff. |
领域 | 气候变化 |
URL | 查看原文 |
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/335468 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | N. Yan,L. Colombera,N. P. Mountney. Evaluation of Morphodynamic Controls on the Preservation of Fluvial Meander-belt Deposits[J]. Geophysical Research Letters,2021. |
APA | N. Yan,L. Colombera,&N. P. Mountney.(2021).Evaluation of Morphodynamic Controls on the Preservation of Fluvial Meander-belt Deposits.Geophysical Research Letters. |
MLA | N. Yan,et al."Evaluation of Morphodynamic Controls on the Preservation of Fluvial Meander-belt Deposits".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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