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| DOI | 10.1029/2020GL088365 |
| Beach Slopes From Satellite-Derived Shorelines | |
| Vos K.; Harley M.D.; Splinter K.D.; Walker A.; Turner I.L. | |
| 发表日期 | 2020 |
| ISSN | 0094-8276 |
| 卷号 | 47期号:14 |
| 英文摘要 | The steepness of the beach face is a fundamental parameter for coastal morphodynamic research. Despite its importance, it remains extremely difficult to obtain reliable estimates of the beach-face slope over large spatial scales (thousands of km of coastline). In this letter, a novel approach to estimate this slope from time series of satellite-derived shoreline positions is presented. This new technique uses a frequency domain analysis to find the optimum slope that minimizes high-frequency tidal fluctuations relative to lower-frequency erosion/accretion signals. A detailed assessment of this new approach at eight locations spanning a range of tidal regimes, wave climates, and sediment grain sizes shows strong agreement (R2 = 0.93) with field measurements. The automated technique is then applied across thousands of beaches in eastern Australia and California, USA, revealing similar regional-scale distributions along these two contrasting coastlines and highlights the potential for new global-scale insight to beach-face slope spatial distribution, variability, and trends. ©2020. American Geophysical Union. All Rights Reserved. |
| 英文关键词 | Beaches; Automated techniques; Eastern Australia; Field measurement; Lower frequencies; Reliable estimates; Sediment grain size; Shoreline position; Tidal fluctuation; Frequency domain analysis; beach; grain size; morphodynamics; satellite; slope; spatial distribution; Australia; California; United States; United States |
| 语种 | 英语 |
| 来源期刊 | Geophysical Research Letters
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/170068 |
| 作者单位 | Water Research Laboratory, School of Civil and Environmental Engineering, Manly Vale, NSW, Australia |
| 推荐引用方式 GB/T 7714 | Vos K.,Harley M.D.,Splinter K.D.,et al. Beach Slopes From Satellite-Derived Shorelines[J],2020,47(14). |
| APA | Vos K.,Harley M.D.,Splinter K.D.,Walker A.,&Turner I.L..(2020).Beach Slopes From Satellite-Derived Shorelines.Geophysical Research Letters,47(14). |
| MLA | Vos K.,et al."Beach Slopes From Satellite-Derived Shorelines".Geophysical Research Letters 47.14(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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