globalchange  > 过去全球变化的重建
DOI: 10.1016/j.marpolbul.2018.02.014
Scopus ID: 2-s2.0-85044677944
Effects of seasonal variations on sediment-plume streaks from dredging operations
Author: Kim N.-H.; Pham V.S.; Hwang J.H.; Won N.I.; Ha H.K.; Im J.; Kim Y.
Source Publication: Marine Pollution Bulletin
ISSN: 0025-326X
EISSN: 1879-3363
Publishing Year: 2018
Volume: 129, Issue:1
pages begin: 26
pages end: 34
Language: 英语
Keyword: Dredging ; Plume ; Restoring force ; Streak ; Suspended sediment
Scopus Keyword: Mixing ; Mixtures ; Numerical models ; Suspended sediments ; Continental shelves ; Density distributions ; Horizontal transport ; Hydrodynamic process ; Plume ; Restoring forces ; Streak ; Surface mixed layers ; Dredging ; aggregate ; barge ; continental shelf ; dredging ; hydrodynamics ; numerical method ; plume ; seafloor ; seasonal variation ; suspended sediment ; transport process ; article ; computer simulation ; dredging ; hydrodynamics ; particle resuspension ; plume ; satellite imagery ; seasonal variation
Subject of Scopus: Agricultural and Biological Sciences: Aquatic Science ; Earth and Planetary Sciences: Oceanography ; Environmental Science: Pollution
English Abstract: When mixtures of aggregates and water dredged from the seabed are discharged at the surface into the adjacent water from a barge, coarse sediments sink immediately and fine sediments are suspended forming a plume. Recently, elongated plumes of fine sediment were observed by satellites near a dredging location on the continental shelf. Such plume streaks were longer in certain conditions with seasonality than expected or reported previously. Therefore, the present work studied the appearance of sediment plume with field measurements and numerical simulations and explains the seasonally varying restoring force and thicknesses of the surface mixed layer resulting from the vertical density distribution near the surface, along with mixing by hydrodynamic process. The resulting mixtures, after vertical restoring and mixing with the surroundings, determine the horizontal transport of suspended sediments. A numerical model successfully reproduced and explained the results from field measurements and satellite images along with the seasonal variations. © 2018 The Authors
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Document Type: 期刊论文
Appears in Collections:过去全球变化的重建

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Affiliation: Department of Civil and Environmental Engineering, Seoul National University, South Korea; Institute of Construction and Environmental Engineering, Seoul National University, South Korea; Korea Water Resources Corporation, Daejeon, South Korea; Department of Ocean Sciences, Inha University, Incheon, South Korea; School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea

Recommended Citation:
Kim N.-H.,Pham V.S.,Hwang J.H.,et al. Effects of seasonal variations on sediment-plume streaks from dredging operations[J]. Marine Pollution Bulletin,2018-01-01,129(1)
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