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DYNAMIC CORRECTION OF ROUGHNESS IN THE HYDRODYNAMIC MODEL 被引量:13

DYNAMIC CORRECTION OF ROUGHNESS IN THE HYDRODYNAMIC MODEL
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摘要 Based on the hydrodynamic model and the Xinanjiang model, the fiver stage forecasting model has been proposed. But its performance is not satisfactory as applied to estuary areas. River roughness is a sensitive parameter in the hydrodynamic model, and its value is related to some substantial uncertainties in the tidal fiver. According to roughness tests, a new method of roughness dynamic correction was developed to improve the performance of the stage model. The method was focused on the usage of observed data for the studied section, and its parameters were analyzed. Nested with the dynamic correction of roughness, the stage model was applied to the tidal reach of the Caoe River. The results demonstrate that the roughness dynamic correction can improve the simulation accuracy of the stage model, and especially has the capacity of reducing the errors at peak stages. Based on the hydrodynamic model and the Xinanjiang model, the fiver stage forecasting model has been proposed. But its performance is not satisfactory as applied to estuary areas. River roughness is a sensitive parameter in the hydrodynamic model, and its value is related to some substantial uncertainties in the tidal fiver. According to roughness tests, a new method of roughness dynamic correction was developed to improve the performance of the stage model. The method was focused on the usage of observed data for the studied section, and its parameters were analyzed. Nested with the dynamic correction of roughness, the stage model was applied to the tidal reach of the Caoe River. The results demonstrate that the roughness dynamic correction can improve the simulation accuracy of the stage model, and especially has the capacity of reducing the errors at peak stages.
出处 《Journal of Hydrodynamics》 SCIE EI CSCD 2009年第2期255-263,共9页 水动力学研究与进展B辑(英文版)
基金 Project supported by the National Natural Science Foundation of China(Grant No.50679024) the Program"Eleven-Five"for Science and Technology of China(Grant No.2006BAC05B02).
关键词 hydrodynamic model Xinanjiang model roughness test roughness dynamic correction nesting-modeling Caoe River hydrodynamic model, Xinanjiang model, roughness test, roughness dynamic correction, nesting-modeling, Caoe River
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