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The BEACH calibrated parameters are represented in Table 2, based on the results of the calibration and validation of SWAT. As the BEACH estimates ETa for different types of crops, the SWAT ETa was calculated for each HRU representing the corresponding crop class for these comparisons.

Table 2

BEACH input variables and parameters

VariablesNotationUnitGrassShrubIndustrial plantsRiceThin forestForest
Curve number condition 2 CN2 – 80 60 65 75 50 45 
Initial basal crop coefficient Kcbini – 0.03 0.20 0.17 0.15 0.30 0.40 
Median basal crop coefficient Kcbmid – 0.30 0.80 1.10 0.85 1.20 1.50 
End basal crop coefficient Kcbend – 0.15 0.25 0.25 0.85 0.85 0.70 
Light use efficiency μ – 0.25 0.50 0.45 0.30 0.60 0.75 
Maximum crop height Hmax 0.30 1.10 1.10 0.40 2.50 10.0 
Maximum leaf area index LAImax m2 m−2 0.06 2.00 3.20 1.50 5.00 6.0 
Maximum root depth RDmax 0.30 1.70 1.50 0.50 1.70 2.50 
Saturated hydraulic conductivity in surface layer Ksat1 m d−1 0.06 0.10 0.10 0.09 0.10 0.11 
Saturated hydraulic conductivity in second layer Ksat2 m d−1 0.26 0.26 0.26 0.26 0.31 0.36 
Soil evaporation depth De 0.15 0.15 0.15 0.15 0.15 0.15 
Soil moisture at saturation in surface layer θ1 m3 m−3 0.45 0.50 0.55 0.55 0.55 0.60 
Soil moisture at saturation in second layer θ2 m3 m−3 0.50 0.60 0.65 0.55 0.65 0.70 
Soil moisture at field capacity in surface layer θfc 1 m3 m−3 0.15 0.23 0.20 0.25 0.30 0.40 
Soil moisture at field capacity in second layer θfc 2 m3 m−3 0.20 0.25 0.22 0.27 0.35 0.45 
Soil moisture at wilting point θwp m3 m−3 0.11 0.13 0.13 0.12 0.14 0.15 
Subsurface flow coefficient C d−1 0.25 0.25 0.25 0.25 0.25 0.25 
Water stress sensitivity p – 0.55 0.55 0.55 0.45 0.75 0.85 
VariablesNotationUnitGrassShrubIndustrial plantsRiceThin forestForest
Curve number condition 2 CN2 – 80 60 65 75 50 45 
Initial basal crop coefficient Kcbini – 0.03 0.20 0.17 0.15 0.30 0.40 
Median basal crop coefficient Kcbmid – 0.30 0.80 1.10 0.85 1.20 1.50 
End basal crop coefficient Kcbend – 0.15 0.25 0.25 0.85 0.85 0.70 
Light use efficiency μ – 0.25 0.50 0.45 0.30 0.60 0.75 
Maximum crop height Hmax 0.30 1.10 1.10 0.40 2.50 10.0 
Maximum leaf area index LAImax m2 m−2 0.06 2.00 3.20 1.50 5.00 6.0 
Maximum root depth RDmax 0.30 1.70 1.50 0.50 1.70 2.50 
Saturated hydraulic conductivity in surface layer Ksat1 m d−1 0.06 0.10 0.10 0.09 0.10 0.11 
Saturated hydraulic conductivity in second layer Ksat2 m d−1 0.26 0.26 0.26 0.26 0.31 0.36 
Soil evaporation depth De 0.15 0.15 0.15 0.15 0.15 0.15 
Soil moisture at saturation in surface layer θ1 m3 m−3 0.45 0.50 0.55 0.55 0.55 0.60 
Soil moisture at saturation in second layer θ2 m3 m−3 0.50 0.60 0.65 0.55 0.65 0.70 
Soil moisture at field capacity in surface layer θfc 1 m3 m−3 0.15 0.23 0.20 0.25 0.30 0.40 
Soil moisture at field capacity in second layer θfc 2 m3 m−3 0.20 0.25 0.22 0.27 0.35 0.45 
Soil moisture at wilting point θwp m3 m−3 0.11 0.13 0.13 0.12 0.14 0.15 
Subsurface flow coefficient C d−1 0.25 0.25 0.25 0.25 0.25 0.25 
Water stress sensitivity p – 0.55 0.55 0.55 0.45 0.75 0.85 

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