Accession Number:

ADA110957

Title:

Remote Synoptic Surface Flow Measurements in Small Bodies of Water.

Descriptive Note:

Final rept.,

Corporate Author:

SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CALIF INST OF MARINE RESOURCES

Personal Author(s):

Report Date:

1980-09-01

Pagination or Media Count:

112.0

Abstract:

This thesis describes a novel approach to remote and synoptic surface flow measurements in small bodies of water it also includes an investigation to determine the practicality of this technique. The approach is based on imaging monochromatic wavetrains, of known frequency, propagating over surface flows. The thesis shows that the wavelength and direction of two monochromatic wave trains of known frequency, at a region of interest, carry all the necessary information to determine the surface flow in that region. Experimental tests, conducted both in a wavetank and in a lagoon, utilizing inexpensive and readily available equipment, are described as well. These tests have shown the viability of this remote and synoptic surface flow measurement. Practical aspects of the measurements, such as vertically nonhomogeneous flow profiles, data processing of the aerial photos via 2D Fourier transforms, and the measurement of wavelength by photography of specular reflection of sun light from waves, are discussed as well. The extension of this measurement to coastal regions in the open ocean is briefly explored together with a preliminary experiment that tests the possibility of obtaining quantitative flow data from boat wave measurements. Such utilization of boat waves may enable surface flow measurements in areas otherwise inaccessible. Author

Subject Categories:

  • Physical and Dynamic Oceanography
  • Hydrology, Limnology and Potamology
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE