Parameters and ranges of values used in the FLEX-Topo model
| Parameter . | Range . | Description . |
|---|---|---|
| FDD | [1,8] | Degree day factor defining the melted water per day per Celsius degree above Tt |
| Tt | [−2.5,2.5] | Air temperature threshold above which snow melts |
| Pt | [5,35] | Threshold parameter indicating occurrence of HOF in hydrological upland |
| SumaxB | [5,500] | Maximum soil moisture capacity in the root zone of hydrological upland |
| PmaxB | [0.1,10] | Maximum percolation of hydrological upland |
| DB | [0,1] | Splitter to separate preferential flow from recharge in hydrological upland |
| Tlag | [0,5] | Time lag between storm and fast runoff generation |
| KfB | [2,50] | Timescale of the runoff from fast reservoir in hydrological upland |
| ImaxFH | [1,10] | Daily maximum interception capacity of sunny hillslope |
| Ce | 0.5 | A ratio above which the actual evaporation is equal to potential evaporation |
| SumaxFH | [100,1,000] | Maximum soil moisture capacity in the root zone of sunny hillslope |
| βFH | [0.1,5] | Parameter used to calculate runoff coefficient in sunny hillslope |
| D | [0,1] | Parameter separating the generated surface runoff on hydrological upland into the splitter to separate preferential flow from recharge in sunny and shady hillslope |
| Kf | [2,50] | Timescale of the runoff from fast reservoir in sunny and shady hillslope |
| ImaxGH | [0,10] | Daily maximum interception capacity of shady hillslope |
| SumaxGH | [50,1,000] | Maximum soil moisture capacity in the root zone of shady hillslope class |
| βGH | [0.1,5] | Parameter used to calculate runoff coefficient in shady hillslope |
| ImaxW | [0.1,10] | Daily maximum interception capacity of hydrological lowland |
| SumaxW | [5,1,000] | Maximum soil moisture capacity in the root zone of hydrological lowland |
| βW | [0.1,5] | Parameter used to calculate runoff coefficient in hydrological lowland |
| KW | [1,9] | Timescale of runoff from fast reservoir in hydrological lowland |
| Ks | 90 | Timescale of the runoff from slow reservoir |
| CRmax | [0,5] | Parameter indicating a constant amount of capillary rise |
| Parameter . | Range . | Description . |
|---|---|---|
| FDD | [1,8] | Degree day factor defining the melted water per day per Celsius degree above Tt |
| Tt | [−2.5,2.5] | Air temperature threshold above which snow melts |
| Pt | [5,35] | Threshold parameter indicating occurrence of HOF in hydrological upland |
| SumaxB | [5,500] | Maximum soil moisture capacity in the root zone of hydrological upland |
| PmaxB | [0.1,10] | Maximum percolation of hydrological upland |
| DB | [0,1] | Splitter to separate preferential flow from recharge in hydrological upland |
| Tlag | [0,5] | Time lag between storm and fast runoff generation |
| KfB | [2,50] | Timescale of the runoff from fast reservoir in hydrological upland |
| ImaxFH | [1,10] | Daily maximum interception capacity of sunny hillslope |
| Ce | 0.5 | A ratio above which the actual evaporation is equal to potential evaporation |
| SumaxFH | [100,1,000] | Maximum soil moisture capacity in the root zone of sunny hillslope |
| βFH | [0.1,5] | Parameter used to calculate runoff coefficient in sunny hillslope |
| D | [0,1] | Parameter separating the generated surface runoff on hydrological upland into the splitter to separate preferential flow from recharge in sunny and shady hillslope |
| Kf | [2,50] | Timescale of the runoff from fast reservoir in sunny and shady hillslope |
| ImaxGH | [0,10] | Daily maximum interception capacity of shady hillslope |
| SumaxGH | [50,1,000] | Maximum soil moisture capacity in the root zone of shady hillslope class |
| βGH | [0.1,5] | Parameter used to calculate runoff coefficient in shady hillslope |
| ImaxW | [0.1,10] | Daily maximum interception capacity of hydrological lowland |
| SumaxW | [5,1,000] | Maximum soil moisture capacity in the root zone of hydrological lowland |
| βW | [0.1,5] | Parameter used to calculate runoff coefficient in hydrological lowland |
| KW | [1,9] | Timescale of runoff from fast reservoir in hydrological lowland |
| Ks | 90 | Timescale of the runoff from slow reservoir |
| CRmax | [0,5] | Parameter indicating a constant amount of capillary rise |