Model:PotentialEvapotranspiration

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PotentialEvapotranspiration


Metadata

Also known as
Model type Single
Model part of larger framework LandLab
Incorporated models or components:
Spatial dimensions 2D
Spatial extent Regional-Scale, Landscape-Scale, Watershed-Scale
Model domain Terrestrial, Hydrology, Climate, Ecosystems
One-line model description Calculates potential evapotranspiration
Extended model description Potential Evapotranspiration Component calculates spatially distributed potential evapotranspiration based on input radiation factor (spatial distribution of incoming radiation) using chosen method such as constant or Priestley Taylor. Ref: Xiaochi et. al. 2013 for 'Cosine' method and ASCE-EWRI Task Committee Report Jan 2005 for 'PriestleyTaylor' method.

Note: Calling 'PriestleyTaylor' method would generate/overwrite shortwave & longwave radiation fields.

Keywords:

evapotranspiration,


First name Sai
Last name Nudurupati
Type of contact
Institute / Organization
Postal address 1
Postal address 2
Town / City Seattle
Postal code 98195
State Washington
Country United States
Email address saisiddu@uw.edu
Phone
Fax


Supported platforms Unix, Linux, Mac OS, Windows
Other platform
Programming language Python
Other program language
Code optimized Single Processor
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development 2015
Does model development still take place? No
If above answer is no, provide end year model development 2020
Code development status Only maintenance
When did you indicate the 'code development status'? 2020
Model availability As code
Source code availability
(Or provide future intension)
Through web repository
Source web address https://github.com/landlab/landlab/tree/master/landlab
Source csdms web address
Program license type BSD or MIT X11
Program license type other
Memory requirements
Typical run time


Describe input parameters grid: RasterModelGrid

A grid.

method: {'Constant', 'PriestleyTaylor', 'MeasuredRadiationPT', 'Cosine'}, optional
Priestley Taylor method will spit out radiation outputs too.

priestley_taylor_constant: float, optional
Alpha used in Priestley Taylor method.

albedo: float, optional
Albedo.

latent_heat_of_vaporization: float, optional
Latent heat of vaporization for water Pwhv (Wd/(m*mm^2)).

psychometric_const: float, optional
Psychometric constant (kPa (deg C)^-1).

stefan_boltzmann_const: float, optional
Stefan Boltzmann's constant (W/(m^2K^-4)).

solar_const: float, optional
Solar constant (W/m^2).

latitude: float, optional
Latitude (radians).

elevation_of_measurement: float, optional
Elevation at which measurement was taken (m).

adjustment_coeff: float, optional
adjustment coeff to predict Rs from air temperature (deg C)^-0.5.

lt: float, optional
lag between peak TmaxF and solar forcing (days).

nd: float, optional
Number of days in year (days).

MeanTmaxF: float, optional
Mean annual rate of TmaxF (mm/d).

delta_d: float, optional
Calibrated difference between max & min daily TmaxF (mm/d).

current_time: float, required only for 'Cosine' method
Current time (Years)

const_potential_evapotranspiration: float, optional for 'Constant' method
Constant PET value to be spatially distributed.

Tmin: float, required for 'Priestley Taylor' method
Minimum temperature of the day (deg C)

Tmax: float, required for 'Priestley Taylor' method
Maximum temperature of the day (deg C)

Tavg: float, required for 'Priestley Taylor' and 'MeasuredRadiationPT' methods
Average temperature of the day (deg C)

obs_radiation float, required for 'MeasuredRadiationPT' method
Observed radiation (W/m^2)

Input format ASCII
Other input format
Describe output parameters "radiation__incoming_shortwave_flux":

{ "dtype": float, "intent": "out", "optional": False, "units": "W/m^2", "mapping": "cell", "doc": "total incident shortwave radiation over the time step", }

"radiation__net_flux": { "dtype": float, "intent": "out", "optional": False, "units": "W/m^2", "mapping": "cell", "doc": "net total radiation over the time step", }

"radiation__net_longwave_flux": { "dtype": float, "intent": "out", "optional": False, "units": "W/m^2", "mapping": "cell", "doc": "net incident longwave radiation over the time step", }

"radiation__net_shortwave_flux": { "dtype": float, "intent": "out", "optional": False, "units": "W/m^2", "mapping": "cell", "doc": "net incident shortwave radiation over the time step", }

"radiation__ratio_to_flat_surface": { "dtype": float, "intent": "in", "optional": False, "units": "None", "mapping": "cell", "doc": "ratio of total incident shortwave radiation on sloped surface to flat surface", }

"surface__potential_evapotranspiration_rate": { "dtype": float, "intent": "out", "optional": False, "units": "mm", "mapping": "cell", "doc": "potential sum of evaporation and potential transpiration", }

Output format ASCII
Other output format
Pre-processing software needed? No
Describe pre-processing software
Post-processing software needed? No
Describe post-processing software
Visualization software needed? No
If above answer is yes
Other visualization software


Describe processes represented by the model
Describe key physical parameters and equations
Describe length scale and resolution constraints
Describe time scale and resolution constraints
Describe any numerical limitations and issues


Describe available calibration data sets
Upload calibration data sets if available:
Describe available test data sets
Upload test data sets if available:
Describe ideal data for testing


Do you have current or future plans for collaborating with other researchers?
Is there a manual available? No
Upload manual if available:
Model website if any https://landlab.github.io
Model forum / discussion board https://github.com/landlab/landlab/issues
Comments


This part will be filled out by CSDMS staff

OpenMI compliant Not yet"Not yet" is not in the list (Yes, No but planned, No but possible, No not possible) of allowed values for the "Code openmi compliant or not" property.
BMI compliant Not yet"Not yet" is not in the list (Yes, No but planned, No but possible, No not possible) of allowed values for the "Code IRF or not" property.
WMT component Not yet"Not yet" is not in the list (Yes, In progress, No but possible, No not possible) of allowed values for the "Code CMT compliant or not" property.
PyMT component Not yet"Not yet" is not in the list (Yes, In progress, No but possible, No not possible) of allowed values for the "Code PyMT compliant or not" property.
Is this a data component
Can be coupled with:
Model info
Sai Nudurupati
Nr. of publications: --
Total citations: 0
h-index: --"--" is not a number.
m-quotient: 0
Qrcode PotentialEvapotranspiration.png
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