Research Article
Flood Forecasting Based on TIGGE Precipitation Ensemble Forecast
Table 1
Some major parameters in TOPX model with calibration results.
| | Parameter name | Physical meaning | Parameter type | Calibration (20010729) | Calibration (20020722) |
| | Decaying parameter | Runoff generation parameters | 180 | 180 | | Maximum underground runoff | 50 | 50 | | Outflow coefficient of free water storage to interflow relationship | 0.012 | 0.012 | | B | Exponential of the distribution to tension water capacity | 0.40 | 0.35 |
| | K | Ratio of potential evapotranspiration to pan evaporation | Soil moisture calculation | 0.85 | 0.85 | | WM | Averaged soil moisture storage capacity | 125.0 | 125.0 | | WUM | Averaged soil moisture storage capacity of upper layer | 30.0 | 30.0 | | WLM | Averaged soil moisture storage capacity of lower layer | 90.0 | 90.0 | | C | Evapotranspiration coefficient of deep layer | 0.12 | 0.12 |
| | KKG | Recession constants of the ground water storage | Runoff concentration parameters | 0.988 | 0.988 | | UH | Initial value of unit hydrograph | , | , |
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