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PREDICTING CONCENTRATION OF TOTAL PHOSPHORUS AND CHLOROPHYLL 'A' IN A LAKE WITH SHORT HYDRAULIC RESIDENCE TIME
Citation:
Premo, B., C. McNabb, F. Payne, T. Batterson, AND J. Craig. PREDICTING CONCENTRATION OF TOTAL PHOSPHORUS AND CHLOROPHYLL 'A' IN A LAKE WITH SHORT HYDRAULIC RESIDENCE TIME. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-85/262 (NTIS PB86163805), 1985.
Description:
The relationship between total phosphorus and chlorophyll a concentration was determined for Skinner Lake, Indiana over an annual cycle in 1978-79. Total nitrogen: total phosphorus ratios in the epilimnion ranged from 19 to 220 suggesting a phosphorus-dependent algal yield in the epilimnion. Approximately 90% of annual TP loading reached the lake via streamflow, and 93% of this entered during snowmelt and spring-overturn periods. At that time incoming water flushed the lake 2.4 times. Atmospheric loading accounted for 1.4% of annual TP load. Internal hypolimnetic TP loading occurred during summer stratification. The 1978-79 data were used in conjunction with the Vollenweider & Kerekes model to produce a model specific for the Skinner Lake system. The model predicted mean epilimnetic total phosphorus and chlorophyll a concentrations from mean total phosphorus concentration in inlet streams and from lake water residence time during the period of spring overturn and summer stratification.