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DTSTAMP:20240516T165719Z
LOCATION:288-290
DTSTART;TZID=America/Chicago:20240515T080000
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UID:IOSC_IOSC 2024_sess130_PAPER239@linklings.com
SUMMARY:Transport of Sunken Very Low Sulfur and No. 6 Heavy Fuel Oils on S
 and Substrates
DESCRIPTION:Paper\n\nTori Sweet and Nancy Kinner (Coastal Response Researc
 h Center) and Melissa Gloekler (RPS)\n\nSunken oil spills create unique re
 sponse challenges due to a lack of visibility of the oil and a limited und
 erstanding of subsurface fate and transport behavior. Flume studies are be
 ing conducted at the Coastal Response Research Center (CRRC) to better pre
 dict the movement of sunken oil, and define and quantify the thresholds of
  oil transport for very low sulfur heavy fuel oil (VLSHFO) (mixed with kao
 linite clay 40% by mass) and No. 6 HFO (mixed with kaolinite clay 24% by m
 ass). Flume conditions represent the Lower Mississippi River near Baton Ro
 uge, LA, which experiences a significant amount of shipping traffic, makin
 g it a likely location for a spill. A previous flume study provided the cr
 itical shear stress (CSS) and critical velocity for sunken No. 6 HFO (mixe
 d with kaolinite clay 24% by weight) on static, flat substrates made of sa
 nd, fine pebbles, and medium pebbles. Oil movement can be: (1) ripple form
 ation, (2) break apart/re-suspension, (3) gravity dispersion, or (4) rope 
 formation. The current flume experiments provide CSS and critical velocity
  for sunken No. 6 HFO and VLSHFO on flat, static sand substrates. The flum
 e operated at water temperatures of 5 °C and 30 °C and at water velocities
  between 0 – 2.02 knots (1.04 m/s). The current project found critical vel
 ocities on flat sand substrates at 5 °C (No. 6 HFO: 0.27 +/- 0.07 m/s; VLS
 HFO: 0.36 +/- 0.07 m/s) to be larger than at 30 °C (No. 6 HFO: 0.17 +/- 0.
 04 m/s; VLSHFO: 0.11 +/- 0.03 m/s). CSS results from this research can be 
 used in oil spill models to improve prediction of sunken oil trajectories 
 along sand bedded rivers. The results can be used in the future in the Sun
 ken Oil Transport Tool (SOTT), previously developed at CRRC to predict mov
 ement of sunken oils. Inputs to the SOTT include in-situ environmental con
 ditions and oil properties for a spill. A summary table produced by the to
 ol predicts if and how the sunken oil will move.\n\nTag: Preparedness\n\nS
 ession Chair: Will Griffiths (IMO)
URL:https://iosc2024.conference-program.com/presentation/?id=PAPER239&sess
 =sess130
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