Accession Number:

ADA561821

Title:

Automating Nearshore Bathymetry Extraction from Wave Motion in Satellite Optical Imagery

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

• Mancini, Steven

Report Date:

2012-03-01

Pagination or Media Count:

117.0

Abstract:

Nearshore depths for Waimanalo Beach, HI, are extracted from optical imagery, taken by the WorldView-2 satellite on 31 March 2011, by means of automated wave kinematics bathymetry WKB. Two sets of three sequential images taken at intervals of about 10 seconds are used for the analyses herein. Water depths are calculated using a computer program that registers the images, estimates the currents, and then uses the linear dispersion relationship for surface gravity waves to estimate depth. Depths are generated from close to shore out to about 20 meters depth. Comparisons with SHOALS LIDAR bathymetry values show WKB depths are accurate to about half a meter, with R2 values of 90, and are frequently in the range of 10-20 percent relative error for depths ranging from 2-16 meters.

Descriptors:

• *BATHYMETRY
• *INSHORE AREAS
• *OPTICAL IMAGES
• *SATELLITE IMAGERY
• *TIDAL CURRENTS
• ACCURACY
• AUTOMATION
• COMPUTER PROGRAMS
• ESTIMATES
• EXTRACTION
• GRAVITY WAVES
• IMAGES
• INTERVALS
• KINEMATICS
• LINEARITY
• MEASURING INSTRUMENTS
• OPTICAL RADAR
• REGISTERS(CIRCUITS)
• SEQUENCES
• SHALLOW WATER
• SURFACE WAVES
• THESES
• WATER
• WAVES

Subject Categories:

• Physical and Dynamic Oceanography
• Photography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE