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Airphoto Analysis of Ocean Outfall Dispersion

Author: Fredrick J. Burgess

Publisher:

Published: 1972

Total Pages: 308

ISBN-13:

The objective of the research was to develop a remote sensing tool for the evaluation of dispersion of wastes from existing or proposed ocean outfalls. Photogrammetric and photo interpretation methods were used to determine dispersion patterns, diffusion coefficients, waste concentrations and nearshore currents. The study is unique in that the aerial photography is not only used to determine the position of points and the size of objects as in normal photogrammetry, but the photograph is also used as an energy sensor. Procedures were developed using dye drops from an airplane. The water current velocity was found to be the dominant factor in the resulting plume pattern. Characteristic airphoto pattern elements are given for visual interpretation of the photography.

Air Photo Analysis of Waste Dispersion from Ocean Outfalls

Author: Wesley P. James

Publisher:

Published: 1970

Total Pages: 326

ISBN-13:

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Aerial photography provides a method of analyzing dispersion of wastes that are discharged into the ocean. This method is more comprehensive than conventional boat sampling in dispersion studies. The photographic technique permits waste concentrations to be measured throughout the plume in one instant; thereby allowing the diffusion analysis to be based on a nonsteady state model rather than the normally assumed steady state model. Field studies were conducted on the waste plume from an ocean outfall. Waste concentrations were measured by conventional boat sampling while aerial photography was taken of the area. Computerized procedures were developed for computing the water currents, waste concentrations and diffusion coefficients from the photography. Comparisons of waste concentrations indicated that the discrepancies are due primarily to changing and shifting of the waste field in this dynamic environment.