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- W2053996932 abstract "CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials CR 28:133-141 (2005) - doi:10.3354/cr028133 Experimental seasonal forecasts of low summer flows in the River Thames, UK, using Expert Systems C. S. Wedgbrow1,*, R. L. Wilby2, H. R. Fox1 1Department of Geographical, Environmental and Earth Sciences, University of Derby, Kedleston Road, Derby DE22 1GB, UK 2Environment Agency, Trentside Offices, Nottingham NG2 5FA, UK *Email: c.s.wedgbrow@derby.ac.uk ABSTRACT: Empirical seasonal forecasts of hydroclimatic variables are typically limited by unrealistic assumptions about stationarity, linearity and normality. Although empirical, Expert Systems (ES) are not bound by such formal data constraints and may be trained on continuous and categorical data simultaneously. Using an ES, summer flows for the River Thames, UK (1971 to 2001), were forecast with up to 6 mo lead-time from climate data from the preceding winter months. The ES models successfully forecast the correct sign of August flow anomalies up to 77% of the time and June to August anomalies 71% of the time. Forecasts of low flow (lowest quartile of the long-term average) in August and summer as a whole were correctly forecast 79 and 89% of the time, respectively. The models also correctly predicted below-average flows for the drought years of 1976, 1984, 1989 to 1992, 1995 and 1997. These extreme events would not have been captured by a forecast based on long-term climatology alone. KEY WORDS: Seasonal forecasting · Expert System · Low flows · River Thames Full article in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in CR Vol. 28, No. 2. Online publication date: March 16, 2005 Print ISSN: 0936-577X; Online ISSN: 1616-1572 Copyright © 2005 Inter-Research." @default.
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- W2053996932 title "Experimental seasonal forecasts of low summer flows in the River Thames, UK, using Expert Systems" @default.
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