Table 2.
Calibrated parameters, description, and their fitted values.
| Parameter | Description | Initial value Copper;Glyphosate | Calibrated value Copper | Calibrated value Glyphosate |
|---|---|---|---|---|
| v__HLIFE_F.pest.dat | Degradation half-life of the chemical on the foliage (days) | 2500;2.5 | 2500 | 2.5 |
| v__HLIFE_S.pest.dat | Degradation half-life of the chemical on the soil (days) | 10,000;47 | 10,000 | 161 |
| v__SKOC.pest.dat | Soil adsorption coefficient normalized for soil organic carbon (mg/kg)/(mg/l) | 115;884 | 94.05 | 17.21 |
| v__WOF.pest.dat | Wash off fraction | 0.5;0.6 | 0.029 | 0.97 |
| v__AP_EF.pest.dat | Application efficiency | 0.75;0.75 | 0.79 | 0.98 |
| v__WSOL.pest.dat | Solubility of the chemical in water (mg/l) | 3.42;900,000 | 3.42 | 100,000 |
| v__PERCOP.bsn | Pesticide percolation coefficient | 0.5;0.5 | 0.81 | 0.98 |
| v__CHPST_REA.swq | Pesticide reaction coefficient in reach (day−1) | 0.007;0.007 | 0.0003 | 0.0002 |
| v__CHPST_VOL.swq | Pesticide volatilization coefficient in reach (m/day) | 0.01;- | 0.006 | - |
| v__CHPST_KOC.swq | Pesticide partition coefficient between water and sediment in reach (m3/g) | 0;0 | 0.0015 | 0.004 |
| v__CHPST_STL.swq | Settling velocity for pesticide sorbed to sediment (m/day) | 1;1 | 8.92 | 2.37 |
| v__CHPST_RSP.swq | Resuspension velocity for pesticide sorbed to sediment (m/day) | 0.002;0.002 | 0.83 | 0.009 |
| v__CHPST_MIX.swq | Mixing velocity (diffusion/dispersion) for pesticide in reach (m/day) | 0.001;0.001 | 0.019 | 0.0085 |
| v__SEDPST_CONC.swq | Initial pesticide concentration in reach bed sediment (mg/m3 sediment) | 0;0 | 963.91 | 106 |
| v__SEDPST_REA.swq | Pesticide reaction coefficient in reach bed sediment (day−1) | 0.05;0.05 | 0.0017 | 0.098 |
| v__SEDPST_BRY.swq | Pesticide burial velocity in reach bed sediment (m/day) | 0.002;0.002 | 0.0019 | 0.0019 |
| v__SEDPST_ACT.swq | Depth of active sediment layer for pesticide (m) | 0.03;0.03 | 0.049 | 0.049 |
| v__SPCON.bsn | Linear parameter for calculating the maximum amount of sediment that can be reentrained during channel sediment routing | 0.0001;0.0001 | 0.0033 | 0.014 |
| v__SPEXP.bsn | Exponent parameter for calculating sediment reentrained in channel sediment routing | 1;1 | 1.20 | 1.33 |
| v__ADJ_PKR.bsn | Peak rate adjustment factor for sediment routing in the subbasin (tributary channels) | 1;1 | 0.5 | 0.65 |
| v__LAT_SED.hru | Sediment concentration in lateral and groundwater flow (mg/l) | 0;0 | 1453.4 | 4027.5 |
v_ corresponds to the replacement of the original value with the new values reported in the row.