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Yields of nitrogen in the Eastern Lake Ontario region

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Title: Yields of nitrogen in the Eastern Lake Ontario region
Author: Rizvi, Syed S. Ahmed; Salbach, S. E.
Abstract: This report presents the nutrient concentrations and quantities in the waters flowing to Lake Ontario from four basins in the eastern Lake Ontario region. The sources which are believed to be primarily responsible for nutrient levels in these four basins as well as the yearly yields discharged to Lake Ontario are presented. The four basins drain primarily rural (pasture and forest) land. A stepwise regression analysis was used to develop a relationship between concentration yield and land use for this region. An attempt to correlate streamflow and total nitrogen concentration was unsuccessful. Average annual yields of nitrogen were noticed in the range of 1,652 - 2,721 lbs/mi2-yr. About 45 to 57 per cent of the annual yields were found to be released during the months of February, March and April. Yields calculated from concentrations of phosphorus found in the same samples indicated a ratio of nitrogen to phosphorus (PO4) of 8:1. Mathematical equations forecasting concentration levels were developed and were tested statistically. These tests showed no statistical significance.
Date: 1968
Rights: Queen's Printer for Ontario, Crown Copyright, Non-Commercial Use Permitted
Rights Holder: Queen's Printer for Ontario

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