Details
Original language | English |
---|---|
Article number | 114610 |
Journal | Marine pollution bulletin |
Volume | 187 |
Early online date | 18 Jan 2023 |
Publication status | Published - Feb 2023 |
Abstract
This paper presents experimental measurements of beaching times for buoyant microplastic particles released, both in the pre-breaking region and within the surf zone. The beaching times are used to quantify cross-shore Lagrangian transport velocities of the microplastics. Prior to breaking the particles travel onshore with a velocity close to the Lagrangian fluid particle velocity, regardless of particle characteristics. In the surf zone the Lagrangian velocities of the microplastics increase and become closer to the wave celerity. Furthermore, it is demonstrated that particles having low Dean numbers (dimensionless fall velocity) are transported at higher mean velocities, as they have a larger tendency to be at the free-surface relative to particles with higher Dean numbers. An empirical relation is formulated for predicting the cross-shore Lagrangian transport velocities of buoyant microplastic particles, valid for both non-breaking and breaking irregular waves. The expression matches the present experiments well, in addition to two prior studies.
Keywords
- Breaking waves, Buoyant particles, Lagrangian transport velocities, Microplastic particles, Non-breaking waves
ASJC Scopus subject areas
- Environmental Science(all)
- Pollution
- Agricultural and Biological Sciences(all)
- Aquatic Science
- Earth and Planetary Sciences(all)
- Oceanography
Research Area (based on ÖFOS 2012)
- TECHNICAL SCIENCES
- Construction Engineering
- Civil Engineering
- Hydraulic engineering
Sustainable Development Goals
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In: Marine pollution bulletin, Vol. 187, 114610, 02.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Experimental investigation on the nearshore transport of buoyant microplastic particles
AU - Larsen, Bjarke Eltard
AU - Al-Obaidi, Mustafa Ali Abdullah
AU - Guler, Hasan Gokhan
AU - Carstensen, Stefan
AU - Goral, Koray Deniz
AU - Christensen, Erik Damgaard
AU - Kerpen, Nils B.
AU - Schlurmann, Torsten
AU - Fuhrman, David R.
PY - 2023/2
Y1 - 2023/2
N2 - This paper presents experimental measurements of beaching times for buoyant microplastic particles released, both in the pre-breaking region and within the surf zone. The beaching times are used to quantify cross-shore Lagrangian transport velocities of the microplastics. Prior to breaking the particles travel onshore with a velocity close to the Lagrangian fluid particle velocity, regardless of particle characteristics. In the surf zone the Lagrangian velocities of the microplastics increase and become closer to the wave celerity. Furthermore, it is demonstrated that particles having low Dean numbers (dimensionless fall velocity) are transported at higher mean velocities, as they have a larger tendency to be at the free-surface relative to particles with higher Dean numbers. An empirical relation is formulated for predicting the cross-shore Lagrangian transport velocities of buoyant microplastic particles, valid for both non-breaking and breaking irregular waves. The expression matches the present experiments well, in addition to two prior studies.
AB - This paper presents experimental measurements of beaching times for buoyant microplastic particles released, both in the pre-breaking region and within the surf zone. The beaching times are used to quantify cross-shore Lagrangian transport velocities of the microplastics. Prior to breaking the particles travel onshore with a velocity close to the Lagrangian fluid particle velocity, regardless of particle characteristics. In the surf zone the Lagrangian velocities of the microplastics increase and become closer to the wave celerity. Furthermore, it is demonstrated that particles having low Dean numbers (dimensionless fall velocity) are transported at higher mean velocities, as they have a larger tendency to be at the free-surface relative to particles with higher Dean numbers. An empirical relation is formulated for predicting the cross-shore Lagrangian transport velocities of buoyant microplastic particles, valid for both non-breaking and breaking irregular waves. The expression matches the present experiments well, in addition to two prior studies.
KW - Breaking waves
KW - Buoyant particles
KW - Lagrangian transport velocities
KW - Microplastic particles
KW - Non-breaking waves
UR - http://www.scopus.com/inward/record.url?scp=85146470368&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2023.114610
DO - 10.1016/j.marpolbul.2023.114610
M3 - Article
VL - 187
JO - Marine pollution bulletin
JF - Marine pollution bulletin
SN - 0025-326X
M1 - 114610
ER -