期刊
GEOPHYSICAL RESEARCH LETTERS
卷 48, 期 11, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2020GL090775
关键词
3020 Littoral processes; 4564 Tsunamis and storm surges; 4560 Surface waves and tides; 4304 Oceanic; coastal boulder deposits; climatology; dimensional analysis; inundation risk; wave runup; water waves
资金
- University of Notre Dame
- National Institute of Standards and Technology
- National Science Foundation [1661015, 172762, 1529756]
- European Research Council [ERC-2019-AdG 833125-HIGHWAVE]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1661015] Funding Source: National Science Foundation
A dimensionless framework has been developed to relate CBD properties with storm-wave hindcasts and measurements, producing data-driven relations. Analysis of individual storm-transported boulders delineates the dynamic space where storm-wave CBD occur.
Coastal boulder deposits (CBD) provide what are sometimes the only remaining signatures of wave inundation on rocky coastlines; in recent decades, CBD combined with initiation of motion (IoM) analyses have repeatedly been used as primary evidence to infer the existence of ancient tsunamis. However, IoM storm wave heights inferred by these studies have been shown to be highly inaccurate, bringing some inferences into question. This work develops a dimensionless framework to relate CBD properties with storm-wave hindcasts and measurements, producing data-driven relations between wave climate and boulder properties. We present an elevation-density-size-inland distance-wave height analysis for individual storm-transported boulders which delineates the dynamic space where storm-wave CBD occur. Testing these new relations against presumed tsunami CBD demonstrates that some fall well within the capabilities of storm events, suggesting that some previous studies might be fruitfully reexamined within the context of this new framework.
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