Class Winstral

• Defined in File Winstral_parameters.hpp

Class Documentation

class Winstral

Compute the Winstral parameter that can be used to redistribute wind and precipitation in complex terrain to improve simulation of snow cover variability.

Depends:

• Direction at reference height ‘vw_dir’ [degrees]

• Snow depth [m] (optional)

Provides:

• Winstral parameter “Sx” [degrees]

Configuration:

{
   "dmax": 300,
   "size_of_step": 10.0,
   "height_param": 0.0,
   "angular_window": 30.0,
   "delta_angle" : 5.0,
   "incl_veg": false,
   "incl_snw": false
   "use_subgridz": true
}

dmax

Max distance to search

size_of_step

Size of the step to take when searching

height_param

Height parameter to account for instrument height or the impact of small terrain perturbation on Sx . See Winstral et al. (2013) for more details

angular_window

The angle for which to bin the wind directions in

delta_angle

incl_veg

Should vegetation height be added to terrain height for the calculation

incl_snw

Should snow height be added to terrain height for the calculation

use_subgridz

Use an interpolated height within the triangle instead of just the triangle cell centre. Avoids step function results.

References:

• Winstral, A., Marks, D., Gurney, R. (2013). Simulating wind-affected snow accumulations at catchment to basin scales Advances in Water Resources 55(), 64-79. https://dx.doi.org/10.1016/j.advwatres.2012.08.011

Type:

double

Default:

300 m

Type:

double

Default:

10.0 m

Type:

double

Default:

0.0

Type:

double

Default:

30 deg

Type:

double

Default:

5.0

Type:

boolean

Default:

false

Type:

boolean

Default:

false

Type:

boolean

Default:

true