GRIB-API definition
UERRA details
Definition | 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 |
instantaneousaccumulated (from the beginning of the forecast) |
Comment |
| ...
WMO GRIB2 definition
2land surface hydrological products |
Parameter category | 0 |
vegetation/biomass categoryhydrology basic products |
Parameter number |
33 | water runoff and drainage | 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 |
| |
Scaled value of first fixed surface |
| |
Type of second fixed surface |
| |
Scale factor of second fixed surface |
| all bits to 1 | missing |
Scaled value of second fixed surface |
|