||Modeling of Water Quality in Lake Michigan and the Effect of the Anomalous Ice Cover of 1976-1977.
Rodgers, P. W. ;
Salisbury, D. K. ;
||De Paul Univ., Grosse Ile, MI. Large Lakes Research Station.;Environmental Research Lab.-Duluth, Grosse Ile, MI. Large Lakes Research Station.
||EPA-R-807412 ;EPA-R-805325; EPA-600/D-84-059;
Water pollution ;
Lake Michigan ;
Mathematical models ;
Computerized simulation ;
Great Lakes ;
MICH1 model ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
An intensive survey of water quality parameters was conducted on Lake Michigan during 1976 and 1977. A nutrient-phytoplankton model (MICH1) was developed and calibrated to data from 1976. MICH1 was then applied to data from 1977 in an attempt to simulate an observed phosphorus depletion of up to 3 microgram-P/1. In order to account for this rapid phosphorus loss an implicit representation of the extreme ice cover which separated these survey years was necessary. This procedure included increasing the apparent settling rate eight fold during ice cover. A time variable total phosphorus model (TPM) was used in a hindcasting application which produced a reasonable recreation of historical phosphorus concentrations.