Tools for Simulation of Evapotranspiration of Field Crops and
Soil Water Balance
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Documentation for package ‘simET’ version 1.0.3
Help Pages
| cal_ActualVapourPressure_for_hourly | Calculating actual vapour pressure for hourly time step |
| cal_ActualVapourPressure_from_dewPoint | Actual vapour pressure derived from dewpoint temperature |
| cal_ActualVapourPressure_from_psychrometricData | Actual vapour pressure (ea) derived from psychrometric data |
| cal_ActualVapourPressure_from_RHmax | Calculating actual vapour pressure derived from RHmax |
| cal_ActualVapourPressure_from_RHmaxAndRHmin | Actual vapour pressure derived from RHmax and RHmin |
| cal_ActualVapourPressure_from_RHmean | Calculating actual vapour pressure derived from RHmean |
| cal_afterRedistribution | Calculating the volumetric water content after redistribution |
| cal_airVaporPressureDeficit_meanCanopyflow | Calculating air vapor pressure deficit at the mean canopy |
| cal_angerFromSouth | Calculating anger from south |
| cal_atmosphericPressure | Calculating atmospheric pressure |
| cal_bulkBoundaryLayerResistance | Calculating bulk boundary layer resistance |
| cal_canopyPenetrationProbabilityForNetRadiation | The canopy penetration probability for net radiation |
| cal_canopyResistance | Calculating canopy resistance |
| cal_canopyTem | Calculating canopy temperature |
| cal_capillaryRise | Calculating capillary rise |
| cal_cropRoughnessLength | Calculating the crop roughness length |
| cal_daylightHours | Calculating Daylight hours |
| cal_DeepPercolation | Calculating Deep percolation |
| cal_Dei_for_DualKc | calculating the depletion in the topsoil layer at the end of the day |
| cal_DPe_for_DualKc | Deep percolation loss from the topsoil layer |
| cal_DPr_for_DualKc | Deep percolation loss from the root layer |
| cal_DP_for_singleKc | Calculating deep percolation |
| cal_eddyDiffusivity_Canopytop | Calculating eddy diffusivity at the canopy top |
| cal_eddyDiffusivity_heightZ | Calculating eddy diffusivity at height z |
| cal_ET0_from_PM | calculating reference evapotranspiration from Penman-Monteith method |
| cal_ET0_from_PM_for_daily | Calculating reference evapotranspiration from Penman-Monteith for daily |
| cal_ET0_from_PM_for_hourly | Calculating reference evapotranspiration from Penman-Monteith method for hourly time step |
| cal_extraterrestrialRadiation_for_daily | Calculating extraterrestrial radiation for daily periods |
| cal_extraterrestrialRadiation_for_shorter | Calculating extraterrestrial radiation for hourly or shorter periods |
| cal_frictionVelocity | Calculating friction velocity |
| cal_hourAngle | Calculating hour angle |
| cal_inverseRelativeDistance_Earth_sun | Calculating inverse relative distance Earth-sun |
| cal_Kcend_for_singleKc | Crop coefficient for the end of the late season stage |
| cal_Kcini_for_SingleKc | Calculating Kcini value |
| cal_Kcmid_for_singleKc | Crop coefficient for the mid-season stage |
| cal_Kc_max_for_DualKc | An upper limit on the evaporation and transpiration from any cropped surface |
| cal_Kr_for_DualKc | Dimensionless evaporation reduction coefficient |
| cal_latentHeatFluxesForCrop | Calculating latent heat fluxes for crop |
| cal_latentHeatFluxesForSoil | Calculating latent heat fluxes for soil |
| cal_localDolarTime | Calculating local solar time |
| cal_meanCanopyFlowToReferenceLevel | Calculating mean canopy flow to reference level |
| cal_meanSaturationVapourPressure | Calculating mean saturation vapour pressure |
| cal_netLongwaveRadiation | Calculating net longwave radiation Rnl |
| cal_netRadiation | Calculating net radiation Rn |
| cal_netRadiationForCrop | Calculating net radiation available to the crop |
| cal_netRadiationForSoil | Calculating net radiation available to the soil |
| cal_netRadiationForSystem | Calculating net radiation available to the system(soil and crop) |
| cal_netSolarRadiation | Calculating net solar (shortware radiation) Rns |
| cal_percolationForExcessWater | Calculating percolation for excess water |
| cal_psychrometriCconstant | Calculating psychrometric constant |
| cal_reductionFactorForE | Calculating reduction factor for evaporation |
| cal_reductionFactorForT | calculating reduction factor for transpiration |
| cal_relativeHumidity | Calculating relative humidity |
| cal_Rs_from_Na | Calculating Solar radiation from actual duration of sunshine |
| cal_saturationVapourPressure | Calculating saturation vapour pressure |
| cal_sensibleHeatFluxesForCrop | Calculating sensible heat fluxes for crop |
| cal_sensibleHeatFluxesForSoil | Calaulating sensible heat fluxes for soil |
| cal_skySolarRadiation_withas_bs | Calculating clear sky solar radiation with as and bs |
| cal_skySolarRadiation_withas_elevation | Calculating clear sky solar radiation with elevation |
| cal_slopeOfSaturationVapourPressureCurve | Calculating slope of saturation vapour pressure curve |
| cal_soilHeatFlux | Calculating Soil/ground heat flux |
| cal_soilHeatFlux_day | Calculating soil heat flux(G) for day/ten-day periods |
| cal_soilHeatFlux_general | Calculating soil heat flux (G) for general |
| cal_soilHeatFlux_hourly | Calculating soil heat flux(G) for hourly/shorter periods |
| cal_soilHeatFlux_monthly | Calculating soil heat flux(G) for monthly periods |
| cal_soilSurfaceResistance | Calculating soil surface resistance |
| cal_soilSurfaceToMeanCanopyFlow | Calculating soil surface to mean canopy flow |
| cal_solarDeclination | Calculating solar declination |
| cal_solarDeclination_in_FAO | Calculating solar declination with FAO56 method |
| cal_solarInclination | Calculating solar inclination |
| cal_solarRadiation | Calculating Solar radiation |
| cal_sunsetHourAngle | Calculating sunset hour angle |
| cal_sunsetTime | Calculating the local solar time for sunset/sunrise |
| cal_TemMean | calculating the mean daily air temperature |
| cal_TEW_for_DualKc | calculating total evaporable water |
| cal_totalLatentHeatFlux | Calculating total latent heat flux |
| cal_WaterStressCoef | Calculating water stress coefficient |
| cal_windSpeed_Canopy | Calculating wind speed above and within the canopies. |
| cal_zeroPlaneHeight | Calculating zero plane displacement height |
| compare_model_plot | Show the results of different models |
| convert_angert_to_radian | Converting angert to radian |
| convert_Date_to_dayofyear | Convert date to day of year |
| convert_degreesCelsius_to_Fahrenheit | Convert degrees Celsius to Fahrenheit |
| convert_Fahrenheit_to_degreesCelsius | Convert Fahrenheit to degrees Celsius |
| convert_Rad_unit | Convert radiation unit |
| convert_windSpeed_to_2m | Convert wind speed to the standard of 2m |
| create_modelDF | Create a csv file or a dataframe in R to store the model data |
| estimate_ea | Estimating missing humidity data |
| estimate_ET0_with_TmaxAndTmin | Estimating ET0 with Tmax and Tmin |
| estimate_goodnessOfFit | Calculating the goodness-of-fit indicators between measured and simulated values |
| estimate_LAI_for_alfalfa | Estimate LAI for alfalfa |
| estimate_Rs_for_islandLocations | Estimating solar radiation for island locations |
| estimate_Rs_from_airTemDiff | Estimating solar radiation data derived from air temperature differences |
| FIalfalfa | A example dataset of alfalfa under flood irrigation |
| Kcb_adj_for_DualKc | Adjust the recommended Kc values at the middle and late stages |
| linear_interpolation | linear interpolation for vector |
| Model_DualKc | Simulation of evapotranspiration using dual crop coefficient method |
| Model_single_Kc | Simulation for evapotranspiration using single crop coefficient method |
| Model_SW | Simulation of evapotranspiration using Shuttleworth-Wallace model |
| SDIalfalfa | A example dataset of alfalfa under subsurface drip irrigation |