Momentum Balance Analysis of Spherical Objects and Long-Term Field Observations of Unexploded Ordnance (UXO) in the Swash Zone

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Author(s)Cristaudo, Demetra
Author(s)Gross, Benedict M.
Author(s)Puleo, Jack A.
Date Accessioned2023-03-16T13:43:44Z
Date Available2023-03-16T13:43:44Z
Publication Date2023-01-03
DescriptionThis article was originally published in Journal of Marine Science and Engineering. The version of record is available at: https://doi.org/10.3390/jmse11010079
AbstractMilitary activity has resulted in unexploded ordnance (UXO) existing in the nearshore. Understanding and predicting UXO behavior is important for object identification, and management. Here, two studies (laboratory and fieldwork) have been conducted to observe UXO surrogates in the swash zone and relate burial and migration to the underlying forcing conditions. A small-scale laboratory dam-break study was conducted to quantify migration of varying density spherical objects at different locations on a sloping, mobile, sandy bed. A moment balance was applied to derive two data-driven relationships to: (1) predict moments from the cross-shore flow velocity with predictions confined within a factor of two; (2) predict upslope or downslope migration from the moment. Fitting coefficients for the upslope and downslope relationships vary as a function of density, initial position, and burial. A field study was also conducted to investigate long-term behavior of eight varieties of UXO surrogates. Of the 129 observations, 56% were mobilized of which 76% were directed offshore. Burial/exposure was mostly related to far-field beach accretion/erosion (67%). However, scouring processes were also observed. Data showed that migration is likely a short-term process and most munitions will ultimately scour into a mobile bed.
SponsorThis research was funded by the Strategic Environmental Research and Development Program (SERDP), project number MR-2503 and MR20-1094.
CitationCristaudo, Demetra, Benedict M. Gross, and Jack A. Puleo. 2023. "Momentum Balance Analysis of Spherical Objects and Long-Term Field Observations of Unexploded Ordnance (UXO) in the Swash Zone" Journal of Marine Science and Engineering 11, no. 1: 79. https://doi.org/10.3390/jmse11010079
ISSN2077-1312
URLhttps://udspace.udel.edu/handle/19716/32459
Languageen_US
PublisherJournal of Marine Science and Engineering
Keywordsunexploded ordnance
Keywordsswash zone
Keywordsmigration
Keywordsburial
Keywordsforce balance
Keywordsmoment balance
Keywordsinitiation of motion
TitleMomentum Balance Analysis of Spherical Objects and Long-Term Field Observations of Unexploded Ordnance (UXO) in the Swash Zone
TypeArticle
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