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In this study, we could not use a real, toxic soluble pollutant to validate the real-time and rapid EC model; thus, we used sucrose to demonstrate the behavior of a soluble pollutant. Because sucrose is harmless to the human body, which satisfies the water quality requirement, normal water diversion is supported after the sudden pollution accident happens. The value of the dispersion coefficient is 3.43 m2/s in the demonstrative project. The contrast of the calculated values and monitored values of peak concentration and arrival time of peak concentration at each monitoring point is shown in Table 3. The result shows that the calculated values and monitored values corresponded well. The relative errors of peak concentration and arrival time of peak concentration are less than 20%. The model can calculate the concentration change under normal water diversion with a relatively high degree of accuracy, especially the calculation of peak concentration and the arrival time of peak concentration.

Table 3

The contrast of the calculated values and monitored values of peak concentration and arrival time of peak concentration at each monitoring point

No.Arrival time of the peak concentration (h)
The peak concentration at monitoring points (mg/L)
Monitored valueCalculated valueRelative errorMonitored valueCalculated valueRelative error
1.33 1.49 12.03% 20.17 23.62 17.11% 
6.08 5.98 1.64% 13.89 13.28 4.39% 
9.08 7.86 13.44% 12.31 12.56 2.03% 
No.Arrival time of the peak concentration (h)
The peak concentration at monitoring points (mg/L)
Monitored valueCalculated valueRelative errorMonitored valueCalculated valueRelative error
1.33 1.49 12.03% 20.17 23.62 17.11% 
6.08 5.98 1.64% 13.89 13.28 4.39% 
9.08 7.86 13.44% 12.31 12.56 2.03% 

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