Accession Number:

ADA626967

Title:

Computer Simulation of Sand Ripple Growth and Migration

Descriptive Note:

Corporate Author:

OREGON HEALTH AND SCIENCES UNIV PORTLAND

Personal Author(s):

Report Date:

2001-09-30

Pagination or Media Count:

6.0

Abstract:

The long-term goals of this study are to improve our understanding and ability to predict sand ripple size and migration under conditions relevant for active mine burial. This will assist in the quantification of how sand ripple growth and migration contribute to subsequent mine burial under waves and currents. In fine to medium sand scour-type bedforms grow to meter scale horizontal dimensions and 0.1-0.4 meter scale vertical dimensions under storm waves Clifton 1976, Hay and Wilson, 1994, Traykovski et al. 2000. There are many potentially dominant variables controlling bedform size, shape, and migration rate, including wave orbital diameter, period, current strength, bed sediment size, size distribution, and compaction. Computer simulation has the potential to assist in understanding which of these variables are dominant under a variety of conditions. The potential improvement in the understanding of the fundamental mechanisms of sand bedform formation from this study will be a significant contribution to the quantification of bedform processes related to the burial of mines in sandy coastal environments.

Subject Categories:

  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE