Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL079933 |
Progradation Speed of Tide-Dominated Tidal Flats Decreases Stronger Than Linearly With Decreasing Sediment Availability and Linearly With Sea Level Rise | |
Maan, D. C.1; van Prooijen, B. C.1; Wang, Z. B.1,2 | |
2019-01-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:1页码:262-271 |
文章类型 | Article |
语种 | 英语 |
国家 | Netherlands |
英文摘要 | We use the results of a one-dimensional morphodynamic model and the basis of the Lagrangian equilibrium state (Maan et al., 2015, ) to derive a quantitative relationship between the progradation speed of tidal flats and the suspended sediment concentration in their adjacent waters and show that the speed increases more than linearly with the concentration. We also show that horizontally prograding flats rise vertically with sea level rise at the expense of their horizontal speed via a linear relationship. If accretion rates are insufficient to keep up with sea level rise, however, the intertidal flat submerges and retreats landward at the same time. We apply the obtained relationships to the Yangtze Estuary to estimate the critical sediment concentration level below which a shift from progradation to retreat can be expected. Plain Language Summary The combination of sea level rise, decreasing sediment availability, and human fixation of the coastline results in large stresses on coastal areas worldwide. Extremely sensitive are the intertidal wetlands, lying in-between the low and the high water line. Loss of coastal wetlands increases the coastal vulnerability to extreme events and sea level rise and undermines the coastal defense. We need a better understanding of the complex dynamics of the seabed to effectively interfere and stimulate its rise. System theory can be used to express system variables in terms of external system drivers. In this paper, the basis of the Lagrangian equilibrium state (Maan et al., 2015, ) is used to derive quantitative relationships between the expansion rate of intertidal flats and three external drivers: the suspended sediment concentration in their adjacent waters (i.e., in the tidal channels), the wave-induced erosion, and the rate of sea level rise. Wave-induced erosion and sea level rise lead to the existence of a critical sediment concentration level below which the intertidal system shifts from expansion to retreat. We apply the obtained relationships on the expanding flats in the Yangtze Estuary to estimate the critical shrinkage factor for the suspended sediment concentration in the estuary. |
英文关键词 | intertidal flats sediment availability coastal retreat sea level rise waves progradation speed |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000456938600029 |
WOS关键词 | CHANGJIANG YANGTZE RIVER ; IMPACTS ; ESTUARY ; EVOLUTION ; MUDFLATS ; DELTAS ; MOUTH |
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/28592 |
专题 | 气候变化 |
作者单位 | 1.Delft Univ Technol, Dept Hydraul Engn, Delft, Netherlands; 2.Deltares, Delft, Netherlands |
推荐引用方式 GB/T 7714 | Maan, D. C.,van Prooijen, B. C.,Wang, Z. B.. Progradation Speed of Tide-Dominated Tidal Flats Decreases Stronger Than Linearly With Decreasing Sediment Availability and Linearly With Sea Level Rise[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(1):262-271. |
APA | Maan, D. C.,van Prooijen, B. C.,&Wang, Z. B..(2019).Progradation Speed of Tide-Dominated Tidal Flats Decreases Stronger Than Linearly With Decreasing Sediment Availability and Linearly With Sea Level Rise.GEOPHYSICAL RESEARCH LETTERS,46(1),262-271. |
MLA | Maan, D. C.,et al."Progradation Speed of Tide-Dominated Tidal Flats Decreases Stronger Than Linearly With Decreasing Sediment Availability and Linearly With Sea Level Rise".GEOPHYSICAL RESEARCH LETTERS 46.1(2019):262-271. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论