Physical factors involved in the disposal of effluents in the Great Lakes were studied. The experimental work was carried out at the Baie du Dore research station on Lake Huron in the summer seasons of 1967 and 1968. Data evaluation and parallel theoretical work continued into 1970. Some direct measurements of lake turbulence intensity were obtained and the structure of big eddies studied in a variety of ways. Some information was obtained on the interrelationship of short internal waves and turbulence. The turbulence intensity level could be shown to be proportional to effective diffusivity. Further studies were carried out of mean concentration and fluctuation distributions in dye plumes. A comprehensive review article on lake dispersion was prepared. This also contained proposals for specific pollution prediction models, as well as tentative estimates of quantitative parameters required in the use of those models. Coastal flow processes became recognized as being of especial importance in pollution problems in virtue of the observed 'coastal entrapment' of pollutants discharged near shore. Theoretical models of the coastal boundary layer were therefore studied, leading to the discovery of 'coastal jets.'

"September 1973." "Project officer, Dr. Walter M. Sanders III, Southeast Environmental Research Laboratory." U.S.G.P.O. sales statement incorrect in publication. Includes bibliographical references (page 13). Prepared for Office of Research and Development, U.S. Environmental Protection Agency