Remote Synoptic Surface Flow Measurements in Small Bodies of Water.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1980
- Accession Number
- ADA110957
Entities
People
- David Sheres
- John D. Isaacs
Organizations
- Scripps Institution of Oceanography