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Then, the performance of daily streamflow driven by gauge precipitation and corrected TRMM precipitation were evaluated (Table 7), and the results display that the NSCE and R2 of daily simulated streamflow in flood season range between 0.58 and 0.77. The daily streamflow hydrograph (Figure 7) shows that simulated streamflow driven by the two precipitation data are consistent with the observed streamflow and to an acceptable extent in the flood season. Although daily streamflow driven by gauge precipitation produces a better fit to the observed streamflow than that driven by corrected TRMM precipitation, the performance of the two models is not very good with low NSCE and R2. The reason is that daily gauge precipitation better matches the actual precipitation than daily corrected TRMM precipitation, and empirical parameters calibrated by monthly streamflow are possibly not suitable for the daily streamflow simulation.
Table 7

Model performance using gauge precipitation and corrected TRMM precipitation at daily scale during the flood season from 1998 to 2008

Data setsNSCEBIAS (%)R2
Gauge precipitation based 0.63 5.45% 0.77 
Corrected TRMM precipitation based 0.58 1.08% 0.65 
Data setsNSCEBIAS (%)R2
Gauge precipitation based 0.63 5.45% 0.77 
Corrected TRMM precipitation based 0.58 1.08% 0.65 
Figure 7

Comparison of the observed and simulated daily hydrographs at Jiayuqiao station.

Figure 7

Comparison of the observed and simulated daily hydrographs at Jiayuqiao station.

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