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The version of SMARG implemented in Source comes from the CRC for Catchment Hydrology Rainfall-Runoff Library (RRL), where it is referred to as SMAR.
Scientific Provenance
SMARG is the soil moisture and accounting model (SMAR) (O’Connell O’Connell et al., 1970; Kachroo, 1992)
Scientific Provenance
SMARG is SMAR with modification to route surface runoff and the groundwater contribution to the stream separately (Kachroo and Liang, 1992). This modified model is also often referred to in the literature as SMAR rather than SMARG (e.g. Podger, 2004; Tuteja and Cunnane, 1999; Vaze et al., 2004).
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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 |
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Vaze, J., Barnett, P., Beale, G., Dawes, W., Evans, R., Tuteja, N.K., Murphy, B., Geeves, G., and Miller, M. (2004). Modelling the effects of land-use change on water and salt delivery from a catchment affected by dryland salinity in south-east Australia, Hydrological Processes, 18: 1613–1637.