SMALL SCALE MODELLING OF ICEBERG SCOURING OF THE SEABED

The paper outlines the results of small scale physical modelling undertaken at 1 gravity to investigate the processes involved in iceberg scouring of the seabed. The modelling was undertaken in a tank containing clay-encrusted gravity consolidated aged saturated silt overlain by water. The iceberg was represented by an aluminium model of 400 x 700mm in plan. A series of springs and bearings allowed the model iceberg to heave and pitch, with spring stiffnesses chosen so as to model the prototype iceberg. Two tests at differing scour depths were carried out in this silt bed. During the tests, the model iceberg was displaced at a constant velocity along the silt tank and allowed to pitch and heave according to the spring response. Pore pressure response for the shallower of the two tests was measured and recorded and the surface and subsurface displacements resulting from the scour were determined. The results from these experiments are compared against existing morphological evidence and are also briefly compared with theoretical models.

• Supplemental Notes:
  • POAC 89; Port and Ocean Engineering under Arctic Conditions, 12-16 June, Luleaa, Sweden. Proc v 1, Luleaa Univ Tech, Res Rpt TULEA 1989:08, v 1, p 133 [13 p, 10 ref, 11 fig]
• Authors:
  • Poorooshasb, F
  • Clark, J I
  • Woodworth-Lynas, C M
• Publication Date: 1989

Language

• English

Subject/Index Terms

• TRT Terms: Icebergs; Scour
• Uncontrolled Terms: Model tests
• Old TRIS Terms: Ice gouging
• Subject Areas: Hydraulics and Hydrology; Marine Transportation;

Filing Info

• Accession Number: 00699145
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM