Observations of Megaripples

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

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2000
Accession Number
ADA610017

Entities

People

  • Britt Raubenheimer
  • Steve Elgar

Organizations

  • Woods Hole Oceanographic Institution

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Acquisition
  • Altimeters
  • Data Acquisition
  • Electronic Mail
  • Engineering
  • Gages
  • Information Operations
  • Migration
  • Observation
  • Orientation (Direction)
  • Pressure Gages
  • Seabed
  • Sediments
  • Shallow Water
  • Water

Readers

  • Coastal Oceanography