Performance of the Entropy Minimax Hydrological Forecasts for California, Water Years 1948–1977

R. F. Eilbert Entropy Limited, South Great Road, Lincoln, MA 01773

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R. A. Christensen Entropy Limited, South Great Road, Lincoln, MA 01773

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Abstract

An entropy minimax analysis to forecast the annual hydrologic status of central California has been re-performed using 96 water years for model training and reserving the 30 consecutive water years 1948–77 for model validation. On the validation set, the model exhibits a 67% accuracy. Statistical tests establish a 98% confidence that this success is not due to chance. Results of the analysis suggest that dry years may be more predictable than wet years for central California.

Abstract

An entropy minimax analysis to forecast the annual hydrologic status of central California has been re-performed using 96 water years for model training and reserving the 30 consecutive water years 1948–77 for model validation. On the validation set, the model exhibits a 67% accuracy. Statistical tests establish a 98% confidence that this success is not due to chance. Results of the analysis suggest that dry years may be more predictable than wet years for central California.

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