General structure
The snow/soil layers file has the structure described below:
- a header section containing the metadata for the location;
- a data section containing description of the layers (if any). Please note that the layers are given from the bottom to the top.
- a hazard data section.
The following points are important to remember:
- the ProfileDate will be used as starting date for the simulation. Therefore, make sure you have meteorological data from this point on!
- the number of soil and snow layers must be right!
Fields definition
initial snow profile fields description
| Field | Description |
| YYYY | Year |
| MM | Month |
| DD | Day |
| HH | Hour |
| MI | Minutes |
| Layer_Thick | layer thickness [m] |
| T | layer temperature [K] |
| Vol_Frac_I | fractional ice volume [0-1] |
| Vol_Frac_W | fractional water volume [0-1] |
| Vol_Frac_WP | fractional preferential flow water volume [0-1] |
| Vol_Frac_V | fractional voids volume [0-1] |
| Vol_Frac_S | fractional soil volume [0-1] |
| |
|
| Field | Description |
| Rho_S | soil density [kg/m3] |
| Conduc_S | mineral phase soil thermal conductivity [w/(mK)] |
| HeatCapac_S | mineral phase soil thermal capacity [J/(kg*K)] |
| rg | grain radius [mm] |
| rb | bond radius [mm] |
| dd | dendricity [0-1] |
| sp | spericity [0-1] |
| mk | marker, see Metamorphism.cc |
| mass_hoar | mass of surface hoar [] |
| ne | number of elements |
| CDot | stress change rate (initialize with 0.) |
| metamo | currently unused |
|
Example
Usually, simulations are started at a point in time when no snow is on the ground, therefore not requiring the definition of snow layers. An example is given below with two soil layers:
[SNOWPACK_INITIALIZATION]
StationName=Davos:Baerentaelli
ProfileDate=1999 10 01 00 00
HS_Last=0.0
Latitude=46.701
Longitude=9.82
Altitude=2560
SlopeAngle=0
SlopeAzi=0
nSoilLayerData=2
nSnowLayerData=0
SoilAlbedo=0.5
BareSoil_z0=0.02
CanopyHeight=0.
CanopyLeafAreaIndex=0.
CanopyDirectThroughfall=0
WindScalingFactor=1.00
ErosionLevel=0
TimeCountDeltaHS=0.00
YYYY MM DD HH MI Layer_Thick T Vol_Frac_I Vol_Frac_W Vol_Frac_V Vol_Frac_S Rho_S Conduc_S HeatCapac_S rg rb dd sp mk mass_hoar ne CDot metamo
1980 10 01 00 00 10 278.15 0.00 0.02 0.01 0.97 2400.0 0.3 900.0 10000 0.0 0.0 0.0 0 0.0 50 0.0 0.0
1980 10 01 00 00 0.5 278.15 0.00 0.02 0.01 0.97 2400.0 0.3 900.0 10000 0.0 0.0 0.0 0 0.0 20 0.0 0.0
SurfaceHoarIndex
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
DriftIndex
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
ThreeHourNewSnow
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
TwentyFourHourNewSnow
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
End
1.9.4