Hydraulic model with roughness coefficient updating method based on Kalman filter for channel flood forecast |
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| Authors: | Hong-jun BAO Lin-na ZHAO |
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| Affiliation: | 1. Public Meteorological Service Center, China Meteorological Administration, Beijing 100081, P. R. China; National Meteorological Center, China Meteorological Administration, Beijing 100081, P. R. China
2. Public Meteorological Service Center, China Meteorological Administration, Beijing 100081, P. R. China ;National Meteorological Center, China Meteorological Administration, Beijing 100081, P. R. China |
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| Abstract: | A real-time channel flood forecast model was developed to simulate channel flow in plain rivers based on the dynamic wave theory.Taking into consideration channel shape differences along the channel,a roughness updating technique was developed using the Kalman filter method to update Manning's roughness coefficient at each time step of the calculation processes.Channel shapes were simplified as rectangles,triangles,and parabolas,and the relationships between hydraulic radius and water depth were developed f... |
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| Keywords: | flood routing Manning's roughness coefficient updating method Kalman filter Froude number Saint-Venant equations hydraulic model |
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