Parameter constraints in a stream ecosystem model: Incorporation of a priori information in Monte Carlo error analysis |
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Authors: | RV ONeill RH Gardner JH Carney |
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Institution: | Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830 U.S.A. |
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Abstract: | Using a model of mass and nutrient dynamics in a stream, we evaluated the use of a priori information (e.g., mass balance constraints, limits for the state variables, etc.) to increase the accuracy and efficiency of Monte Carlo error analysis. The results indicated that a priori information can effectively eliminate physically unrealistic simulations and reduce uncertainty about the predicted values. Some types of a priori information proved more helpful than increased accuracy in measuring model parameters. |
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