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| Name | percolation | Abbreviation | perc | Unit | kg m-2 | paramId: | 260430 |
UERRA details
| Definition | Soil total column lateral water flow and bottom soil drainage. | The percolation is the downward movement of water under hydrostatic pressure in the saturated zone. This water might still end up in rivers and lakes as discharge but it is a slower process than water runoff or drainage. Such defined percolation is an input for hydrological models together with e.g. water runoff. | |
| Validity | accumulated (from the beginning of the forecast) | ||
| Comment |
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WMO GRIB2 definition
| Parameter | ||
|---|---|---|
| Discipline | 1 | hydrological products |
| Parameter category | 0 | hydrology basic products |
| Parameter number | 16 | percolation rate** |
| Type of statistical processing | 1 | accumulated |
**newly approved by WMO (release in May 2016)
| Level | ||
|---|---|---|
| Type of first fixed surface | 177 | Deep soil (of indefinite depth) |
| Scale factor of first fixed surface | all bits to 1 | missing |
| Scaled value of first fixed surface | all bits to 1 | missing |
| Type of second fixed surface | all bits to 1 | missing |
| Scale factor of second fixed surface | all bits to 1 | missing |
| Scaled value of second fixed surface | all bits to 1 | missing |
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