start:hype_model_description:processes_above_ground
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision | |||
|
start:hype_model_description:processes_above_ground [2024/02/21 08:53] cpers [Snowfall distribution] |
start:hype_model_description:processes_above_ground [2024/02/21 08:54] (current) cpers [Snowfall distribution] |
||
|---|---|---|---|
| Line 73: | Line 73: | ||
| The relative snowfall is limited to the interval [1 - //sfdmax//, 1 + //sfdmax//] for the linear model and [0,//sfdmax//] for the log-linear. //sfdmax// is a general parameter. The relative snowfall is normalized within each subbasin so that the subbasin mean snowfall is preserved. The snowfall distribution is applied only if snow is falling for a fraction of the subbasin area that is larger than a limit (//limit//). | The relative snowfall is limited to the interval [1 - //sfdmax//, 1 + //sfdmax//] for the linear model and [0,//sfdmax//] for the log-linear. //sfdmax// is a general parameter. The relative snowfall is normalized within each subbasin so that the subbasin mean snowfall is preserved. The snowfall distribution is applied only if snow is falling for a fraction of the subbasin area that is larger than a limit (//limit//). | ||
| - | For the option of distributing snowfall also between subbasins, two versions are currently implemented. One option may distribute snowfall to the nearest downwind subbasin, while the other option distribute snowfall to all subbasins within a distance range. Both variants use the log-linear Winstral coefficients. They are used to calculate the relative snowfall for each class in all the subbasins separately. For version one, the distribution of the snowfall of the upwind subbasin between the upwind and downwind subbasins is then calculated based on windspeed (//wind//) and distance (//d//). The two subbasins share the //sharefrac// of snowfall, and the rest goes to the upwind subbasin only. For the other version, the distribution of the snowfall is calculated for the subbasin within a range depending on windspeed, and with a reducing weight (//weight//) depending on distance (//d//). | + | For the option of distributing snowfall also between subbasins, two versions are currently implemented. One option may distribute snowfall to the nearest downwind subbasin, while the other option distribute snowfall to all subbasins within a distance range. Both variants use the log-linear Winstral coefficients. They are used to calculate the relative snowfall for each class in all the subbasins separately. For the first version, the distribution of the snowfall of the upwind subbasin between the upwind and downwind subbasins is then calculated based on windspeed (//wind//) and distance (//d//). The two subbasins share the //sharefrac// of snowfall, and the rest goes to the upwind subbasin only. For the other version, the distribution of the snowfall is calculated for the subbasin within a range depending on windspeed, and with a reducing weight (//weight//) depending on distance (//d//). |
| <m> sharefrac = exp(-2*(d/{sndrscale*wind})^2) </m> | <m> sharefrac = exp(-2*(d/{sndrscale*wind})^2) </m> | ||
start/hype_model_description/processes_above_ground.txt ยท Last modified: 2024/02/21 08:54 by cpers
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
