Abstract
One of the most prominent sources of error and uncertainty in water quality modeling results is the input data. In this study, data from three meteorological databases were used to test the performance of a water temperature model of Lake Diefenbaker: the data from the Environment and Climate Change Canada (ECCC) had long-term quality control history (>20 years); the data from the AccuWeather had short-term quality control history (<10 years), and the data from the MeteoBlue database were modeled values. The CE-QUAL-W2 hydrodynamic and water quality model was used for this study. The models were calibrated by adjusting model coefficients controlling the amount of measured solar radiation and wind that reach the surface of the water. The sensitivity results showed very similar performances with slightly better performances (root mean square root difference of ±0.1) with the ECCC data followed by the MeteoBlue data and thereafter by the AccuWeather data respectively.
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