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Considering the characteristics of the cascade system, we select 12 criteria to measure the safety of the three reservoirs and Leshan city during the flood event. We can obtain the criteria values of the six alternatives after reservoir flood routing, as shown in Table 3.

Table 3

Criteria values of the six alternatives

Alternative no.Zmax1Ze1Rv1Zmax2Ze2Rv2Zmax3Ze3Rv3QmaxTW
2,490.5 2,481.6 0.7 1,835.6 1,835.2 1.3 845.5 841.7 6.2 6,161.8 130 286 
2,490.5 2,481.6 0.7 1,835.6 1,835.2 1.3 850.1 850.1 13.4 7,732.4 122 331 
2,490.5 2,481.6 0.7 1,835.6 1,835.2 1.3 846.2 843.0 7.55 5,632.0 103 159 
2,493.0 2,485.8 3.4 1,835.0 1,835.0 844.7 842.0 5.35 5,819.5 103 155 
2,493.0 2,485.8 3.4 1,835.0 1,835.0 850.0 850.0 13.2 6,552.1 96 197 
2,493.0 2,485.8 13.4 1,835.0 1,835.0 845.8 843.0 5,252.9 86 22 
Alternative no.Zmax1Ze1Rv1Zmax2Ze2Rv2Zmax3Ze3Rv3QmaxTW
2,490.5 2,481.6 0.7 1,835.6 1,835.2 1.3 845.5 841.7 6.2 6,161.8 130 286 
2,490.5 2,481.6 0.7 1,835.6 1,835.2 1.3 850.1 850.1 13.4 7,732.4 122 331 
2,490.5 2,481.6 0.7 1,835.6 1,835.2 1.3 846.2 843.0 7.55 5,632.0 103 159 
2,493.0 2,485.8 3.4 1,835.0 1,835.0 844.7 842.0 5.35 5,819.5 103 155 
2,493.0 2,485.8 3.4 1,835.0 1,835.0 850.0 850.0 13.2 6,552.1 96 197 
2,493.0 2,485.8 13.4 1,835.0 1,835.0 845.8 843.0 5,252.9 86 22 

Zmax, m; Ze, m; Rv,%; Qmax, m3/s; T, h; W, million m3.

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