Sediment Yields and Nutrient Loadings From Canadian Watersheds Tributary to Lake Erie: an Overview

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Abstract
Mean annual loadings and unit yields for sediment, phosphorus, nitrogen, and chloride have been calculated for 19 river-mouth locations on the Canadian side of Lake Erie for the period 1967–72. Data, drawn from routine monitoring data files of Federal and Provincial agencies, are discussed in terms of biases inherent in such monitoring programs. Unit yields are only marginally related to basin substrate texture but show pronounced storage characteristics within basins for sediment and sediment-bound nutrients. It is suggested that there is a minimum threshold size of basin below which nutrient runoff is relatively unaffected by basin storage and uptake.

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