Water vertical inputs

High-level functions to define water inputs into the soil of a stand:

Function hydrology_waterInputs performs canopy water interception and snow accumulation/melt.
Function hydrology_snowMelt estimates snow melt using a simple energy balance, according to Kergoat (1998).

Usage

hydrology_snowMelt(tday, rad, LgroundSWR, elevation)

hydrology_waterInputs(
  x,
  prec,
  rainfallIntensity,
  pet,
  tday,
  rad,
  elevation,
  Cm,
  LgroundPAR,
  LgroundSWR,
  modifyInput = TRUE
)

Arguments

tday: Average day temperature (ºC).
rad: Solar radiation (in MJ/m2/day).
LgroundSWR: Percentage of short-wave radiation (SWR) reaching the ground.
elevation: Altitude above sea level (m).
x: An object of class spwbInput or growthInput.
prec: Precipitation for the given day (mm)
rainfallIntensity: Rainfall intensity rate (mm/h).
pet: Potential evapotranspiration for the given day (mm)
Cm: Canopy water storage capacity.
LgroundPAR: Percentage of photosynthetically-active radiation (PAR) reaching the ground.
modifyInput: Boolean flag to indicate that the input x object should be modified during the simulation.

Value

Function hydrology_waterInputs returns a named vector with the following elements, all in mm:

Rain: Precipitation as rainfall.
Snow: Precipitation as snow.
Interception: Rainfall water intercepted by the canopy and evaporated.
Snowmelt: Snow melted during the day, and added to the water infiltrated.
NetRain: Rainfall reaching the ground.

Details

The function simulates different vertical hydrological processes, which are described separately in other functions. If modifyInput = TRUE the function will modify the x object (including both soil moisture and the snowpack on its surface) as a result of simulating hydrological processes.

References

Kergoat L. (1998). A model for hydrological equilibrium of leaf area index on a global scale. Journal of Hydrology 212–213: 268–286.

Author

Miquel De Cáceres Ainsa, CREAF