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.
BEACH input variables and parameters
| Variables . | Notation . | Unit . | Grass . | Shrub . | Industrial plants . | Rice . | Thin forest . | Forest . |
|---|---|---|---|---|---|---|---|---|
| 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 | m | 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 | m | 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 | m | 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 |
| Variables . | Notation . | Unit . | Grass . | Shrub . | Industrial plants . | Rice . | Thin forest . | Forest . |
|---|---|---|---|---|---|---|---|---|
| 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 | m | 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 | m | 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 | m | 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 |