Effects of Vessel-Induced Waves on the Composition and Amount of Drift in an Ice Environment in the St. Marys River

摘要

The study determines how the composition and amounts of drift vary with the following conditions: Ice cover with vessel traffic; ice cover without vessel traffic; and ice free with vessel traffic. Samples were taken with drift nets anchored at four locations in the littoral waters of the St. Marys River. The data from this study and the study in 1979 indicate that the drift rates for all components were considerably higher under conditions of ice cover with vessel traffic than under conditions of ice cover without vessel traffic or ice free with vessel traffic. The accelerated transport of this material through the system in winter, when biological production reaches the annual minimum, may result in a significant loss to the system.