Record Display for the EPA National Library Catalog


Main Title Transports in the Duluth-Superior Harbor (Journal Version).
Author Stortz, K. R. ; Sydor, M. ;
CORP Author Minnesota Univ.-Duluth. Dept. of Physics.;Environmental Research Lab.-Duluth, MN.
Year Published 1980
Report Number EPA-R-803952; EPA-600/J-80-423;
Stock Number PB83-240804
Additional Subjects Sediment transport ; Hydrodynamics ; Water pollution ; Mathematical models ; Particles ; Water currents ; Water traffic ; Turbulence ; Boundaries ; Reprints ; Duluth-Superior Harbor ; Water levels ; Oil spills
Library Call Number Additional Info Location Last
NTIS  PB83-240804 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
A hydrodynamic model and a water quality model for the Duluth-Superior harbor are developed and verified by using data on currents, water levels, and water quality parameters. The water quality model is subsequently used to simulate the transport of particulates resuspended by ship traffic and the dispersal of dissolved material spilled into the harbor at a major industrial site. Resuspension of bottom sediments by ship traffic is an important secondary source of harbor turbidity. Suspended solids in ship resuspension plumes range from 10 to 50 mg/l, five times the usual concentration of suspended solids in the harbor. An estimated 100,000 kg of material is resuspended per passage of a ship. The resuspended material is coarse and settles rapidly, thus only 0.1% of the material flows out directly into Lake Superior. It was found that a spill of dissolved pollutant in the inner harbor would take from 8 to 21 days to reach Lake Superior at peak concentrations.