# ET.McGuinnessBordne

##### McGuinness-Bordne Formulation

Implementing the McGuinness-Bordne formulation for estimating potential evapotranspiration.

##### Usage

```
# S3 method for McGuinnessBordne
ET(data, constants, ts="daily", …)
```

##### Arguments

- data
A list of data which contains the following items (climate variables) required by McGuinness-Bordne formulation:

*Tmax*,*Tmin*- constants
A list named

`constants`

consists of constants required for the calculation of Jensen-Haise formulation which must contain the following items:*Elev*- ground elevation above mean sea level in m,*lambda*- latent heat of vaporisation = 2.45 MJ.kg^-1,*lat_rad*- latitude in radians,*Gsc*- solar constant = 0.0820 MJ.m^-2.min^-1.- ts
Must be either

`daily`

,`monthly`

or`annual`

, which indicates the disired time step that the output ET estimates should be on. Default is`daily`

.- …
Dummy for generic function, no need to define.

##### Details

This formulation provides a single calculation method with no alternatives available.

##### Value

The function prints a calculation summary to the screen containing the following elements:
- ET model name and ET quantity estimated
- Time step of the output ET estimates (i.e. the value of argument `ts`

)
- Units of the output ET estimates
- Time duration of the ET estimation
- Number of ET estimates obtained in the entire time-series
- Basic statistics of the estimated ET time-series including *mean*, *max* and *min* values.

The function also generates a list containing the following components, which is saved into a `csv`

file named as *ET_McGuinnessBordne.csv* in the working directory:

Daily aggregated estimations of McGuinness-Bordne potential evapotranspiration.

Monthly aggregated estimations of McGuinness-Bordne potential evapotranspiration.

Annually aggregated estimations of McGuinness-Bordne potential evapotranspiration.

Monthly averaged estimations of daily McGuinness-Bordne potential evapotranspiration.

Annually averaged estimations of daily McGuinness-Bordne potential evapotranspiration.

Name of the formulation used which equals to `McGuinness-Bordne`

.

Type of the estimation obtained which is `Potential Evapotranspiration`

.

##### References

Oudin, L., Hervieu, F., Michel, C., Perrin, C., Andreassian, V., Anctil, F.Loumagne, C. 2005, *Which potential evapotranspiration input for a lumped rainfall-runoff model?: Part 2-Towards a simple and efficient potential evapotranspiration model for rainfall-runoff modelling*. Journal of Hydrology, vol. 303, no. 1-4, pp. 290-306.

Xu, C.Y.Singh, V.P. 2000, *Evaluation and generalization of radiation-based methods for calculating evaporation*., Hydrological Processes, vol. 14, no. 2, pp. 339-349.

##### See Also

##### Examples

```
# NOT RUN {
# Use processed existing data set and constants from kent Town, Adelaide
data("processeddata")
data("constants")
# Call ET.McGuinnessBordne under the generic function ET
results <- ET.McGuinnessBordne(data, constants, ts="daily")
# }
```

*Documentation reproduced from package Evapotranspiration, version 1.10, License: GPL (>= 2)*