Accession Number:

ADA610017

Title:

Observations of Megaripples

Descriptive Note:

Annual rept.

Corporate Author:

WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF APPLIED OCEAN PHYSICS AND ENGINEERING

Personal Author(s):

Report Date:

2000-09-30

Pagination or Media Count:

4.0

Abstract:

The long-term objective is to develop models that predict the presence or absence and characteristics of seafloor megaripples given geological sediment characteristics, underlying geological framework and hydrodynamical waves, currents conditions. Bedforms with amplitudes of O 1 m and lengths of O 10 m megaripples, bumps, and holes are believed to form and migrate on seafloors with mobile sediment for a range of wave and current conditions. Strong currents that produce sheet flow can destroy bedforms. The specific objectives here are to observe seafloor bedforms, waves, and near-bottom currents to determine wave and current conditions that produce megaripple-sized bedforms relationships between megaripple size and waves, currents, and bottom stress megaripple migration rate as a function of waves, currents, and bottom stress conditions that cause megaripple destruction

Subject Categories:

  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE