Seismic Measurements Using Distributed Acoustic Sensing (DAS) for Underwater Soft Sediment Characterization : Insights from Laboratory- and Field-Scale Measurements
(2025) In Sensors 25(23).- Abstract
Scholte wave surveys were conducted at both the laboratory and field scales to evaluate the reliability of distributed acoustic sensing (DAS) with a fiber-optic cable resting on top of unconsolidated sedimentary deposits to determine the distribution of S-wave velocity underneath. Laboratory measurements performed in a controlled environment at the Deltares Laboratory facility demonstrated that DAS retrieves low- and high-frequency energy associated with Scholte and guided waves. The recorded DAS signals provided consistent Scholte wave signals, which depicted coherent phase velocity energy that was used to accurately depict S-wave velocity layering. We observed the presence of guided waves at higher frequencies, which appeared to be... (More)
Scholte wave surveys were conducted at both the laboratory and field scales to evaluate the reliability of distributed acoustic sensing (DAS) with a fiber-optic cable resting on top of unconsolidated sedimentary deposits to determine the distribution of S-wave velocity underneath. Laboratory measurements performed in a controlled environment at the Deltares Laboratory facility demonstrated that DAS retrieves low- and high-frequency energy associated with Scholte and guided waves. The recorded DAS signals provided consistent Scholte wave signals, which depicted coherent phase velocity energy that was used to accurately depict S-wave velocity layering. We observed the presence of guided waves at higher frequencies, which appeared to be enhanced as the source position was moved away from the fiber-optic cable. A field survey was carried out using a linear set-up in a shallow lake, where a fiber-optic cable was placed on top of a sediment layer with a thickness of 5–10 m. The results from DAS were validated using standard hydrophone measurements performed simultaneously. The 2D S-wave velocity cross-section retrieved by DAS appeared to be in good agreement with the results obtained from hydrophone measurements, especially when detecting the main velocity transition occurring at a 7–10 m depth from the free surface.
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- author
- Obando Hernandez, Edwin ; Rossi, Matteo LU ; Nieboer, Roeland ; Pefkos, Manos ; de Boer, Wiebe and Doornenbal, Pieter
- organization
- publishing date
- 2025-12
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- distributed acoustic sensing, hydrophone measurements, Scholte waves, soft sediments
- in
- Sensors
- volume
- 25
- issue
- 23
- article number
- 7234
- publisher
- MDPI AG
- external identifiers
-
- scopus:105024637642
- pmid:41374608
- ISSN
- 1424-8220
- DOI
- 10.3390/s25237234
- language
- English
- LU publication?
- yes
- id
- 24e5b272-f0b7-4a7e-9881-6b990853c37a
- date added to LUP
- 2026-02-13 10:40:03
- date last changed
- 2026-02-14 03:00:08
@article{24e5b272-f0b7-4a7e-9881-6b990853c37a,
abstract = {{<p>Scholte wave surveys were conducted at both the laboratory and field scales to evaluate the reliability of distributed acoustic sensing (DAS) with a fiber-optic cable resting on top of unconsolidated sedimentary deposits to determine the distribution of S-wave velocity underneath. Laboratory measurements performed in a controlled environment at the Deltares Laboratory facility demonstrated that DAS retrieves low- and high-frequency energy associated with Scholte and guided waves. The recorded DAS signals provided consistent Scholte wave signals, which depicted coherent phase velocity energy that was used to accurately depict S-wave velocity layering. We observed the presence of guided waves at higher frequencies, which appeared to be enhanced as the source position was moved away from the fiber-optic cable. A field survey was carried out using a linear set-up in a shallow lake, where a fiber-optic cable was placed on top of a sediment layer with a thickness of 5–10 m. The results from DAS were validated using standard hydrophone measurements performed simultaneously. The 2D S-wave velocity cross-section retrieved by DAS appeared to be in good agreement with the results obtained from hydrophone measurements, especially when detecting the main velocity transition occurring at a 7–10 m depth from the free surface.</p>}},
author = {{Obando Hernandez, Edwin and Rossi, Matteo and Nieboer, Roeland and Pefkos, Manos and de Boer, Wiebe and Doornenbal, Pieter}},
issn = {{1424-8220}},
keywords = {{distributed acoustic sensing; hydrophone measurements; Scholte waves; soft sediments}},
language = {{eng}},
number = {{23}},
publisher = {{MDPI AG}},
series = {{Sensors}},
title = {{Seismic Measurements Using Distributed Acoustic Sensing (DAS) for Underwater Soft Sediment Characterization : Insights from Laboratory- and Field-Scale Measurements}},
url = {{http://dx.doi.org/10.3390/s25237234}},
doi = {{10.3390/s25237234}},
volume = {{25}},
year = {{2025}},
}