Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074231 |
Advance, Retreat, and Halt of Abrupt Gravel-Sand Transitions in Alluvial Rivers | |
Blom, Astrid1; Chavarrias, Victor1; Ferguson, Robert I.2; Viparelli, Enrica3 | |
2017-10-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:19 |
文章类型 | Article |
语种 | 英语 |
国家 | Netherlands; England; USA |
英文摘要 | Downstream fining of bed sediment in alluvial rivers is usually gradual, but often an abrupt decrease in characteristic grain size occurs from about 10 to 1 mm, i.e., a gravel-sand transition (GST) or gravel front. Here we present an analytical model of GST migration that explicitly accounts for gravel and sand transport and deposition in the gravel reach, sea level change, subsidence, and delta progradation. The model shows that even a limited gravel supply to a sand bed reach induces progradation of a gravel wedge and predicts the circumstances required for the gravel front to advance, retreat, and halt. Predicted modern GST migration rates agree well with measured data at Allt Dubhaig and the Fraser River, and the model qualitatively captures the behavior of other documented gravel fronts. The analysis shows that sea level change, subsidence, and delta progradation have a significant impact on the GST position in lowland rivers. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413921300027 |
WOS关键词 | FRASER-RIVER ; TRANSPORT ; MODEL ; MORPHOLOGY ; CONCAVITY ; ABRASION ; DYNAMICS ; PROFILE ; FRONT |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/28324 |
专题 | 气候变化 |
作者单位 | 1.Delft Univ Technol, Fac Civil Engn & Geosci, Delft, Netherlands; 2.Univ Durham, Dept Geog, Durham, England; 3.Univ South Carolina, Dept Civil & Environm Engn, Columbia, SC 29208 USA |
推荐引用方式 GB/T 7714 | Blom, Astrid,Chavarrias, Victor,Ferguson, Robert I.,et al. Advance, Retreat, and Halt of Abrupt Gravel-Sand Transitions in Alluvial Rivers[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(19). |
APA | Blom, Astrid,Chavarrias, Victor,Ferguson, Robert I.,&Viparelli, Enrica.(2017).Advance, Retreat, and Halt of Abrupt Gravel-Sand Transitions in Alluvial Rivers.GEOPHYSICAL RESEARCH LETTERS,44(19). |
MLA | Blom, Astrid,et al."Advance, Retreat, and Halt of Abrupt Gravel-Sand Transitions in Alluvial Rivers".GEOPHYSICAL RESEARCH LETTERS 44.19(2017). |
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