Application of the Takagi–Sugeno fuzzy system for combination forecasting of river flow in semiarid mountain regions |
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| Authors: | Lijie Zhang Wenzhi Zhao Zhibin He Hu Liu |
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| Affiliation: | 1. Linze Inland River Basin Research Station, Chinese Ecosystem Research Network;2. Laboratory of Watershed Hydrology and Ecology, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | Because of high spatial heterogeneity and the degree of uncertainty about hydrological processes in large‐scale catchments of semiarid mountain areas, satisfactory forecasting of daily discharge is seldom available using a single model in many practical cases. In this paper the Takagi–Sugeno fuzzy system (TS) and the simple average method (SAM) are applied to combine forecasts of three individual models, namely, the simple linear model (SLM), the seasonally based linear perturbation model (LPM) and the nearest neighbour linear perturbation model (NNLPM) for modelling daily discharge, and the performance of modelling results is compared in five catchments of semiarid areas. It is found that the TS combination model gives good predictions. The results confirm that better prediction accuracy can be obtained by combining the forecasts of different models with the Takagi–Sugeno fuzzy system in semi‐arid mountain areas. Copyright © 2009 John Wiley & Sons, Ltd. |
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| Keywords: | Takagi– Sugeno fuzzy system combining forecasts rainfall– runoff modelling semiarid mountain area |
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