xrspatial.fire.rate_of_spread#

xrspatial.fire.rate_of_spread(slope_agg: DataArray, wind_speed_agg: DataArray, fuel_moisture_agg: DataArray, fuel_model: int = 1, name: str = 'rate_of_spread') → DataArray[source]#

Rate of spread using a simplified Rothermel model.

Uses the Anderson 13 fuel model lookup table and computes per-pixel spread rate from slope, wind speed, and fuel moisture.

Parameters:

  • slope_agg (xr.DataArray) – Terrain slope in degrees.

  • wind_speed_agg (xr.DataArray) – Mid-flame wind speed in km/h.

  • fuel_moisture_agg (xr.DataArray) – Dead fuel moisture content as a fraction (0-1).

  • fuel_model (int, default=1) – Anderson 13 fuel model number (1-13).

  • name (str, default='rate_of_spread') – Name of output DataArray.

Returns:

Rate of spread in m/min (float32).

Return type:

xr.DataArray