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DETERMINATION OF ATMOSPHERIC PHOSPHORUS ADDITION TO LAKE MICHIGAN
Citation:
Eisenreich, S., P. Emmling, AND A. Beeton. DETERMINATION OF ATMOSPHERIC PHOSPHORUS ADDITION TO LAKE MICHIGAN. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/3-80/063.
Description:
Bulk precipitation was collected on a monthly basis in the Lake Michigan basin for 18 months during 1975-1976 to determine atmospheric P loadings to Lake Michigan. The sampling network consisted of bulk collectors at 23 land stations and 2 in-lake buoys located off urban and rural areas. Annual TP loading to Lake Michigan for 1976 based on loading rates of 0.184 and 0.303 micrograms/sq cm/mo for the north and south basins, respectively was 1.69x10 to the 6th power kb/year, representing approx. 16% of the total P budget. North and south basins showed different TP loading properties with approx. 62% depositing in the south basin. Seasonal variations in loading rates showed maxima in late spring and early summer, and minima in winter.