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Yield of phosphorus in the eastern Lake Ontario region

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Title: Yield of phosphorus in the eastern Lake Ontario region
Author: Rizvi, Syed S. Ahmed; Salbach, S. E.
Abstract: The yields of phosphorus were estimated from four selected Eastern Lake Ontario region watersheds. These streams drain mainly agriculture and pasture lands to Lake Ontario. The variation of concentrations, flows and yields for the four watersheds were calculated and plotted for comparison on a monthly basis over the four year study period. Mathematical equations for forecasting of concentration levels were developed and tested for statistical significance. The mean monthly yields were also plotted to assess on a quantitative basis during the calendar year, the variation of the discharge of phosphorus to Lake Ontario. About 40 to 50 per cent of the annual yields were found to be released during the months of February, March and April. A step-wise regression analysis was used for developing the relationship between concentration, yield and land use for this region. Three year annual yields of phosphorus from the four watersheds ranged between 237 to 810 lbs/mi2-yr. The methodology presented could be used on other water quality data.
URI: http://hdl.handle.net/10214/15627
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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