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| Parameter | Description | Units | Default | Range |
|---|---|---|---|---|
| C | Evaporation coefficient | none | 0 | 0-1 |
| G | used to estimate the proportion of moisture in excess of soil moisture storage capacity recharging groundwater (and also discharged to the stream) | none | 0 | 0-1 |
| H | used to estimate the proportion of rainfall excess contributing to the generated runoff as saturation excess runoff or the Dunne runoff | none | 0 | 0-1 |
| Kg | Time lag parameter for groundwater routing | none | 0.01 | 0.01-200 |
| n | Surface runoff hydrograph ‘shape’ parameter (i.e. number of linear reservoirs) | none | 1 | 1-10 |
| nK | Surface runoff hydrograph ‘scale’ parameter (i.e. time lag parameter in Nash cascade model) | none | 1 | 1-10 |
| T | Ratio of potential evapotranspiration to pan evaporation | none | 0 | 0-1 |
| Y | Infiltration capacity of the soil | mm.d-1 | 0 | 0-100 |
| Z | Effective moisture storage capacity of the soil contributing to the runoff generation mechanisms | mm | 0200 | 0-125 |
| Info | ||
|---|---|---|
| ||
| Note: the number of soil layers is determined from "Z" (Soil Moisture Storage Capacity) and a constant in the code which is 25 mm (the depth of each of the "groundwater"/soil layers in mm of water). |
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| Variable | Parameter | Frequency | Notes | ||||
|---|---|---|---|---|---|---|---|
| PET | Potential evapotranspiration | time-step | |||||
| x | Excess rainfall | time-step | see Figure 1 | ||||
| INF | Infiltration | time-step | Estimated from (1-H’)x (see Figure 1) | ||||
| r1 | Direct runoff | time-step | see Figure 1 | ||||
| r2 | Rainfall in excess of infiltration capacity (Hortonian runoff) | time-step | see Figure 1 | ||||
| r3 | Moisture in excess of soil moisture capacity discharged to stream | time-step | see Figure 1 | ||||
| r9 | Moisture in excess of soil moisture capacity recharging (percolating to) groundwater | time-step | see Figure 1 | ||||
| rs | Generated surface runoff | time-step | see Figure 1 | ||||
| QOUTsurf | Routed surface runoff (from gamma function) | time-step | see Figure 1 | ||||
| QOUTgw | Routed groundwater runoff | time-step | see Figure 1 | ||||
| SMStot | Soil moisture store contents (total of all layers) | time-step | see Figure 1 | Layers 1...etc | List of soil moisture store layers | one-off item | see Figure 1 |
Reference list
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