| The application of SWAT and SUFI-2 to runoff simulation in Tuweihe (Upper) watershed |
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| DOI：10.7606/j.issn.1000-7601.2012.06.34 |
| Key Words: SWAT SUFI-2 runoff Tuweihe(Upper)watershed |
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| Abstract: |
| Trough building the hydrology, meteorology, landuse and soil databases of Tuweihe(Upper)watershed in the arid and semiarid climate region, the physieally-based distributed hydrological model-SWAT 2005 model was em-ployed in this study to simulate the hydrology process and surface runoff in this watershed. The SUFI-2 method was used to uncertainly analyze, calibrate and validate the results of SWAT simulation. The runoff data from 1977-1983 in Gaoji-abao hydrological station was used to calibrate, and the runoff data from 1984-1989
was employed to verdict the results of simulation. The results of the calibration are: the correlation coefficient(R2) and the model efficiency coefficient (Ens) of the annual runoff is less than 0.6(The value of more than 0.6 represents the SWAT model can greatly simulate the study watershed). As for the monthly runoffs, the correlation coefficient(R2) and the model efficieney coefficient (Ens) of the annual runoffs are over 0.6 or similar to 0.6. The correlation coefficient(R2) and the model efficiency co-efficient (Ens) of monthly runoff fror May to October eover 0.8 or similar to 0.8.Thus, the improved SWAT-SUFI
model can be applied to simulate hydrology process and surface runoff of this arid and semi-arid watershed in flood sea-son. |
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