spwb_land.RdFunction spwb_land implements a distributed hydrological model that simulates daily local water balance, from spwb_day,
on grid cells of a watershed while accounting for overland runoff, subsurface flow and groundwater flow between cells.
Function growth_land is similar, but includes daily local carbon balance and growth processes in grid cells,
provided by growth_day.
spwb_land(
sf,
SpParams,
meteo = NULL,
dates = NULL,
summary_frequency = "years",
local_control = medfate::defaultControl(),
correction_factors = default_watershed_correction_factors(),
progress = TRUE
)
growth_land(
sf,
SpParams,
meteo = NULL,
dates = NULL,
summary_frequency = "years",
local_control = medfate::defaultControl(),
correction_factors = default_watershed_correction_factors(),
progress = TRUE
)An object of class sf with the following columns:
geometry: Spatial geometry.
elevation: Elevation above sea level (in m).
slope: Slope (in degrees).
aspect: Aspect (in degrees).
land_cover_type: Land cover type of each grid cell (values should be 'wildland', 'agriculture', 'rock', 'artificial' or 'water').
forest: Objects of class forest.
soil: Objects of class soil or data frames of physical properties.
state: Objects of class spwbInput or growthInput (optional).
meteo: Data frames with weather data (required if parameter meteo = NULL).
crop_factor: Crop evapo-transpiration factor. Only required for 'agriculture' land cover type.
waterOrder: Integer vector indicating cell processing order.
waterQ: A list of water discharge values to neighbors.
queenNeigh: A list of integers identifying the (up to 8) queen neighbors, for each cell.
channel: A logical vector indicating whether each cell belongs to the channel network.
depth_to_bedrock: Depth to bedrock (mm).
bedrock_conductivity: Bedrock (saturated) conductivity (in m·day-1).
bedrock_porosity: Bedrock porosity.
snowpack: A numeric vector with the snow water equivalent content of the snowpack in each cell.
aquifer: A numeric vector with the water content of the aquifer in each cell.
represented_area: Area represented by each cell (in m2).
A data frame with species parameters (see SpParamsMED).
Input meteorological data (see spwb_spatial).
A Date object describing the days of the period to be modeled.
Frequency in which summary layers will be produced (e.g. "years", "months", ...) (see cut.Date).
A list of control parameters (see defaultControl) for function spwb_day or growth_day.
A list of watershed correction factors for hydraulic parameters.
Boolean flag to display progress information for simulations.
Functions spwb_land and growth_land return list of class of the same name as the function with the following elements:
sf: An object of class sf, similar to the output of spwb_spatial,
with the following columns:
state: A list of model input objects for each simulated stand.
aquifer: A numeric vector with the water volume in the aquifer of each cell.
snowpack: A numeric vector with the snowpack water equivalent volume of each cell.
summary: A list of cell summaries, containing the following variables:
Rain: Rainfall (in mm).
Snow: Snowfall (in mm).
Snowmelt: Snow melt (in mm).
Interception: Rainfall interception (in mm).
NetRain: Net rain, i.e. throughfall, (in mm).
Runon: The amount of water imported from other cells via surface runoff (in mm).
Runoff: The amount of water exported via surface runoff (in mm).
Infiltration: The amount of water infiltrating into the soil (in mm).
DeepDrainage: The amount of water draining from soil to the aquifer via deep drainage (in mm).
SaturationExcess: The amount of water that reaches the soil surface because of soil saturation (in mm).
AquiferDischarge: The amount of water that reaches deepest soil layer from a saturated aquifer (in mm).
SubsurfaceInput: The amount of water that reaches the soil from adjacent cells via subsurface flow (in mm).
SubsurfaceOutput: The amount of water that leaves the soil towards adjacent cells via subsurface flow (in mm).
GroundwaterInput: The amount of water that reaches the aquifer from adjacent cells via groundwater flow (in mm).
GroundwaterOutput: The amount of water that leaves the aquifer towards adjacent cells via groundwater flow (in mm).
SoilEvaporation: Bare soil evaporation (in mm).
Transpiration: Plant transpiration (in mm).
SWE: Snow water equivalent (in mm) of the snowpack.
Psi1: Soil water potential of the topmost layer (in MPa).
SoilVol: Soil water volume integrated across vertical layers (in mm).
WTD: Water table depth (in mm from surface).
watershed_balance: A data frame with as many rows as summary points and where columns are components of the water balance at the watershed level (i.e., rain, snow, interception, infiltration, soil evaporation, plant transpiration, ...).
watershed_soil_balance: A data frame with as many rows as summary points and where columns are components of the water balance at the watershed level restricted to those cells with a soil definition.
daily_runoff: A matrix with daily runoff (in m3/day) at each of the outlet cells of the landscape.
spwb_day, growth_day,
spwb_spatial
if (FALSE) {
# Load example watershed data
data("example_watershed")
# Set crop factor
example_watershed$crop_factor <- NA
example_watershed$crop_factor[example_watershed$land_cover_type=="agriculture"] <- 0.75
# Load example meteo data frame from package meteoland
data("examplemeteo")
# Load default medfate parameters
data("SpParamsMED")
# Set simulation period
dates <- seq(as.Date("2001-01-01"), as.Date("2001-03-31"), by="day")
# Launch simulations
res <- spwb_land(example_watershed, SpParamsMED, examplemeteo,
dates = dates, summary_frequency = "month")
}