Accession Number : ADA132454

Title :   Lake Erie Nutrient Loads, 1970-1980.

Descriptive Note : Final rept.,


Personal Author(s) : Yaksich,Stephen M ; Melfi,David A ; Baker,David B ; Kramer,Jack W

PDF Url : ADA132454

Report Date : Sep 1982

Pagination or Media Count : 199

Abstract : This program was designed to monitor concentration changes occurring in association with increased streamflow with primary emphasis placed on sampling during high flow conditions (when the bulk of mass transport occurs). This report presents the author's best estimate of the loadings for several nutrients to Lake Erie using collected data. A Calculational procedure employing stepwise concentration functions for fixed flow intervals was developed. Intervals which best represented the full range of streamflows were selected and used in conjunction with the daily flow records and the concentration functions to calculate monthly loadings. Loadings for unmeasured areas were extrapolated from the loadings for adjacent areas. The loadings were then combined with municipal and industrial point source loading information and Lake Huron outflow data to produce a point, nonpoint, and total nutrient load summary for the Detroit-St. Clair Basin and the three basins of Lake Erie on a monthly and yearly basis for the period 1970-1980. The nutrient loadings presented include total phosphorus, orthophosphate, nitrite-basin, ammonia, organic nitrogen, chloride, and silica. A three-basin, in-lake, total phosphorus model is presented and in-lake concentrations are modeled using the calculated 1970-1980 loadings. The results are compared with measured in-lake values. (Author)

Descriptors :   *Lake Erie, Nutrients, Sampling, Water quality, Phosphorus, Chemicals, Models

Subject Categories : Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE