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MIKE SHE mode parameter values are varied based on the above sensitivity analysis. The optimal values reached from the calibrated process are shown in Table 3.

Table 3

Calibrated parameter values of MIKE SHE model

Key parameterUnitOptimal value
River bed resistance – Strickler coefficient 
 Tributary and upstream of Vu Gia m(1/3)/s 18 
 Tributary and upstream of Thu Bon m(1/3)/s 25 
 Linking branch m(1/3)/s 30 
 Downstream m(1/3)/s 40 
Overland flow – Strickler coefficient 
 Planted forest m(1/3)/s 
 Rural settlement m(1/3)/s 
 Rice m(1/3)/s 16 
 Annual crops m(1/3)/s 
 Perennial crops m(1/3)/s 
 Unused land m(1/3)/s 
 Natural forest m(1/3)/s 
 Urban m(1/3)/s 90 
 Water surface m(1/3)/s 33 
Unsaturated flow – soil property 
 Kuz-clay m/s 1.2 10−8 
 Kuz-silt loam m/s 2.45 10−6 
 Kuz-loamy sand m/s 8.5 10−6 
 Kuz-light clay m/s 2.085 10−4 
 Kuz-sand m/s 2.89 10−4 
Saturated zone 
 Kh – horizontal hydraulic conductivity m/s 6.7 10−5 
Key parameterUnitOptimal value
River bed resistance – Strickler coefficient 
 Tributary and upstream of Vu Gia m(1/3)/s 18 
 Tributary and upstream of Thu Bon m(1/3)/s 25 
 Linking branch m(1/3)/s 30 
 Downstream m(1/3)/s 40 
Overland flow – Strickler coefficient 
 Planted forest m(1/3)/s 
 Rural settlement m(1/3)/s 
 Rice m(1/3)/s 16 
 Annual crops m(1/3)/s 
 Perennial crops m(1/3)/s 
 Unused land m(1/3)/s 
 Natural forest m(1/3)/s 
 Urban m(1/3)/s 90 
 Water surface m(1/3)/s 33 
Unsaturated flow – soil property 
 Kuz-clay m/s 1.2 10−8 
 Kuz-silt loam m/s 2.45 10−6 
 Kuz-loamy sand m/s 8.5 10−6 
 Kuz-light clay m/s 2.085 10−4 
 Kuz-sand m/s 2.89 10−4 
Saturated zone 
 Kh – horizontal hydraulic conductivity m/s 6.7 10−5 

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