ORCID

Abstract

Coastal boulder deposits provide vital information on extreme wave events. They are crucial for understanding storm and tsunami impacts on rocky coasts, and for understanding long-term hazard histories. But study of these deposits is still a young field, and growth in investigation has been rapid, without much contactbetween research groups. Therefore, inconsistencies in field data collection among different studies hinder crosssite comparisons and limit the applicability of findings across disciplines. This paper analyses field methodologiesfor coastal boulder deposit measurement based using an integrated database (ISROC-DB), and demonstrates inconsistencies in current approaches. We use the analysis as a basis for outlining protocols to improve data comparability and utility for geoscientists, engineers, and coastal planners. Using standardised and comprehensive data reporting with due attention to precision and reproducibility—including site characteristics, boulder dimensions, complete positional data, tide characteristics, and geodetic and local topographic datum information— will help ensure complete data retrieval in the field. Applying these approaches will further ensure that data collected at different times and/or locations, and by different groups, is useful not just for the study being undertaken, but for other researchers to analyse and reuse. We hope to foster development of the large, internally consistent datasets that are the basis for fruitful meta-analysis. This is particularly important given increasing focus on long-term monitoring of coastal change. By recommending a common set of measurements, adaptable to available equipment and personnel, this work aims to support accurate and thorough coastal boulder deposit documentation, enabling broader applicability and future-proofed datasets. Field protocols described and recommended here also apply as best practices for coastal geomorphology field work in general.

Publication Date

2025-10-28

Publication Title

Natural Hazards and Earth System Sciences

Volume

25

Issue

10

ISSN

1561-8633

Acceptance Date

2025-09-16

Deposit Date

2025-09-22

Funding

This work was supported by National Science Foundation grant 2114016, and represents a contribution of the ISROC (Inundation Signatures on Rocky Coastlines) Research Coordination Network. It is also a contribution to IGCP Project 725: Forecasting Coastal Change. RC acknowledges support from National Science Foundation grants 1529756 and 1529756. MAO acknowledges funding from Funda o para a Ciencia e a Tecnologia (contract 2022.08411.CEECIND/CP1715/CT0005) and UIDB/00329/2020. Financial support. This research has been supported by the Directorate for Geosciences (grant no. 2114016).

First Page

4203

Last Page

4226

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