### 1.6.12 Release Notes (2021-04-27)

#### New features

• CreateInputsModel() gains a QupstrUnit argument in order to manage the unit of the flow in the Qupstream argument in case of the use of a semi-distributed version of a hydrological model. (#110)
• RunModel_Lag() gains a QcontribDown argument containing the time series of the runoff contribution of the downstream sub-basin in case of the use of a semi-distributed version of a hydrological model. (#109)

#### Bug fixes

• Fixed bug in RunModel. The RunModel_Lag() can now be passed to the FUN_MOD argument. (#108)
• Fixed bug in RunModel_Lag(). The function no longer returns two values for a single time step run. (#102)
• Fixed bug in RunModel_Lag(). The StateEnd value is now correct when there are more than a single upstream basin. (#103)
• Fixed bug in RunModel_Lag(). The StateEnd value is now correct when the upstream flow unit is mm/time step. (#104)
• Fixed bug in RunModel_CemaNeigeGR5H(). The solid precipitation are now taken into account in the GR5H model. (#105)
• Fixed bug in RunModel_CemaNeige() and CreateInputsModel(). RunModel_CemaNeige() now runs at the hourly time step. (#106)
• Fixed the ‘param_optim’ vignette. The starting points used for the multi-start approach are now in the transformed space.(#101)

#### Major user-visible changes

• LengthHydro must now be set in kilometers (not anymore in meters) in the CreateInputsModel() function. (#112)
• TransfoParam_GR5H() now use the same transformation as TransfoParam_GR4H() for the X1 parameter. The previous transformation set by Ficchì seems unnecessary as it provokes irrealistically high X1 values. (#50)

#### Minor user-visible changes

• The RunModel*() functions now run faster. The computation times are significantly shorter for long times series with many time steps (e.g. hourly times series), due to a better management of the missing values in and out the Fortran codes. Only simulation computation times have been improved (it is largely invisible to the user for calibration computation times). (#113)
• The external calibration algorithms used in ‘param_optim’ and ‘param_mcmc’ vignettes now run faster. The RunModel_*() functions used during the parameter estimation process now run faster because the outputs contain only the simulated flows (see the Outputs_Sim argument in the CreateRunOptions() help page).

#### Version control and issue tracking

• The CI pipelines now fail when the checks return a warning message (and not just an error message). (#86)
• The reverse dependencies packages (e.g. the ‘airGRteaching’ or the ‘airGRdatassim’) are now checked by the CI pipelines. (#86)

### 1.6.10.4 Release Notes (2021-01-29)

#### New features

• Added a section ‘param_optim’ vignette to explain how to manage with multiobjective optimization using the ‘caRamel’ package. (#61)

#### Major user-visible changes

• Imax() now returns an error message when IndPeriod_Run doesn’t select 24 hours by day, instead of numeric(0). (#92)

#### Minor user-visible changes

• Fixed warning returned by GCC Fortran when compiling frun_GR5H.f90. (#93)

#### CRAN-compatibility updates

• Coerce character dates into POSIXlt in RunModel_GR1A() example and in SeriesAggreg() tests in order to avoid bad subsetting on time series due to mixing UTC and local time (error returned on macOS flavors). (#94)

### 1.6.9.27 Release Notes (2021-01-18)

#### New features

• Added SeriesAggreg S3 method with functions for InputsModel, OutputsModel, list, data.frame class objects. This new version of the SeriesAggreg() function also allows to compute regimes. (#25)
• Added .GetAggregConvertFun() private function in order to choose automatically the ConvertFun to apply on each element of objects used in SeriesAggreg.InputsModel() and SeriesAggreg.OutputsModel().
• Added .AggregConvertFunTable data.frame that allows the user to see what names of list items or data.frame column names are guessed and eventually customise this correspondence table.
• PE_Oudin() now presents a RunFortran argument to run the code in Fortran or in R. The Fortran mode is the fastest. (#62)
• Added RunModel_Lag() which allows to perform a single run for the Lag model over the test period in order to run semi-distributed GR models. (#34)
• Added the ‘sd_model’ vignette to explain how to manage the use of semi-distributed GR models. (#34)
• Added [ S3 method for InputsModel class object in order to extract subsets of it. (#67)

#### Deprecated and defunct

• The TimeFormat argument is now deprecated in SeriesAggreg(). (#41)
• The NewTimeFormat argument is now deprecated in SeriesAggreg() and replaced by the Format argument. (#41)
• The deprecated RunSnowModule argument has been removed from the CreateRunOptions() function. (#23)

#### Bug fixes

• Fixed bug inSeriesAggreg(). The function now runs when TimeLag >= 3600. (#41)
• Fixed bug inSeriesAggreg(). The function now runs when the time series contain some columns entirely filled with missing values. (#43)
• Fixed bug in RunModel_GR1A(). Reversed PotEvap and Precip outputs are now reordered (in the previous versions PotEvap contained the precipitation values and Precip contained the evapotranspiration values, the Qsim values were already correct). (#65)

#### Major user-visible changes

• Added output to RunModel_GR2M() function (Ps). (#51)
• PE_Oudin() can now run for several locations (i.e. several latitudes) in the Fortran mode (RunFortran = TRUE). In this case Lat must be of the same length as Temp. (#62)
• RunModel() now allows to run semi-distributed GR models. (#34)
• The ConvertFun argument of the SeriesAggreg() function can now be set to names of aggregation functions that return value of length 1 (not only "sum" or "mean", but e.g. "min", "max", "Q95"). (#82)

#### Minor user-visible changes

• The .FortranOutputs() function is no longer exported in the namespace.
• RunModel_GR1A() now uses the Fortran version of the model code. This code is no longer duplicated: the R version which was used was removed. (#65)
• Character argument verification now use partial matching in PE_Oudin() and SeriesAggreg() functions. (#37)
• RunModel_*() funcions were cleaned up, with no effect on their outputs. (#14)
• .ErrorCrit() function now returns a warning message when a criterion computed on less than 10 time-steps (whatever the unit of the time step). (#14)
• Added the diagram of GR5H in the RunModel_GR5H() documentation. (#49)
• The Exch was renames AExch in the RunModel_GR2M() output. (#87)
• Added ‘Es’ and ‘Ps’ on the GR2M diagram available in the RunModel_GR2M() help page. (#88)
• The plot.OutputsModel() function does not check anymore the time step by comparing the calculation of the difference of the last two time steps because it is already checked by the class of the OutputsModel object, which is therefore assumed to be necessarily valid. (#56)

#### Version control and issue tracking

• Implement automatic tests in the package. (#52)

#### CRAN-compatibility updates

• ‘airGR’ now depends on R >= 3.1.0 because of the use of the anyNA function.
• The ‘hydroPSO’ package is back on CRAN and it is again suggested (cf. the ‘param_optim’ vignette). (#38)
• For more safety, the following “basic” packages are now imported : ‘graphics’, ‘grDevices’, ‘stats’, ’utils. (#74)

### 1.4.3.65 Release Notes (2020-02-28)

#### CRAN-compatibility updates

• The run period is reduced in the example of the Imax() function in order to run faster.
• The ‘hydroPSO’ package is no longer suggested (but the code linked to its use and is always present in the ‘param_optim’ vignette).

### 1.4.3.60 Release Notes (2020-01-29)

#### New features

• A digital object identifier (DOI) now allows to identify the manual of the ‘airGR’ package. When you use ‘airGR’ in your work, please always cite both the article and the manual. The last one allows to know the version of the package that is used in order to enhance reproducible research. The references can be displayed with the citation("airGR") command.

#### Bug fixes

• Fixed bug in Imax(). The default value of the TestedValues argument was wrong due to a mistyped argument name in the seq() function.

### 1.4.3.52 Release Notes (2020-01-21)

#### New features

• plot.Outputsmodel() now allows to draw actual evapotranspiration when which = "ActEvap" or which = "All" (overlaid to potential evapotranspiration if already drawn). (#2)
• Added RunModel_GR5H() and RunModel_CemaNeigeGR5H() functions to run the hourly model GR5H (with or without the CemaNeige module). These models present an optional additionnal interception store. (#13)
• Added Imax() which allows to estimate the maximum capacity of the GR5H interception store. (#13)

#### Bug fixes

• Fixed bug in TransfoParam_GR1A(). The number of model parameters was wrong (2 instead of 1) which caused an error during the GR1A model calibration. (#1)
• Fixed bug in plot.OutputsModel(). The function does not return any error message when log_scale = TRUE, Qobs = NULL and user want to draw flows time series.
• Fixed bug in RunModel_*GR*(). The functions do not return any error message anymore due to slightly negative values returned by GR4H, GR4J, GR5J or GR6J Fortran codes (the message was returned by CreateIniStates() when the final states were created). The RunModel_*GR*() functions now return zero instead of these slightly negative values, except for the ExpStore where negatives values are allowed.
• Fixed bug in the .ErrorCrit() function. The Box-Cox transformation formula is now corrected when the ErrorCrit*() functions are used.

#### Major user-visible changes

• Added outputs to RunModel_GR4H() function (Pn, Ps, AExch1, AExch2).

#### Minor user-visible changes

• Added the diagram of GR2M in the RunModel_GR2M() documentation.
• Fortran codes cleaned and translated from F77 to F90. (#18)

#### CRAN-compatibility updates

• Cleaning of the Fortran codes (comment formatting).

### 1.3.2.42 Release Notes (2019-09-20)

#### Version control and issue tracking

• Users can now track changes (https://gitlab.irstea.fr/HYCAR-Hydro/airgr) and issues (https://gitlab.irstea.fr/HYCAR-Hydro/airgr/issues).

#### Bug fixes

• Fixed bug in RunModel_CemaNeige(). The function now runs correctly when IndPeriod_WarmUp = 0L in CreateRunOptions() in order to completely disable the warm-up period (e.g. to perform a forecast form a given initial state).
• Fixed bug in CreateIniStates(). The function now returns the right number of end states when CemaNeige is used without hysteresis.
• Fixed bug in the RunModel_CemaNeige*() functions. G and Gthr end states are no more inverted in the output values.

#### Minor user-visible changes

• Spurious flows set to NA into the BasinObs time series of the L0123001 dataset.

### 1.3.2.23 Release Notes (2019-06-20)

#### New features

• CreateInputsCrit() now allows power (as a numeric or as a character) and the Box-Cox transformations in the transfo argument.
• Added RunModel_CemaNeigeGR4H() function to run the hourly model GR4H with the CemaNeige module.
• Added PE_Oudin() function to compute Oudin’s potential evapotranspiration for hourly or daily time steps.
• plot.OutputsModel() now presents a LayoutMat argument (and additionnal related argument: LayoutWidths, LayoutHeights) to specify complex plot arrangements.

#### Deprecated and defunct

• The PEdaily_Oudin() function is deprecated and his use has been replaced by the use of PE_Oudin().

#### Bug fixes

• Fixed bug in plot.OutputsModel(). The function now runs correctly when the which argument contains the "CorQQ" value without "CumFreq".

#### Major user-visible changes

• plot.OutputsModel() can now draw PE or error time series if the which argument is set to "all" or "PotEvap" or "Error".
• plot.OutputsModel() now allows new values for the which argument: "all" corresponds to all graphs, "synth" corresponds to the main graphs (default value; corresponding to "all" in the previous versions of the package) (i.e. c("Precip", "Temp", "SnowPack", "Flows", "Regime", "CumFreq", "CorQQ")), "ts" corresponds to the time series graphs (i.e. c("Precip", "PotEvap", "Temp", "SnowPack", "Flows")) and “perf” corresponds to the performance graphs (i.e. c("Error", "Regime", "CumFreq", "CorQQ")).

#### Minor user-visible changes

• .ErrorCrit() private function added to check inputs into ErrorCrit_*() functions. The ErrorCrit_*() functions were simplified accordingly.
• CreateInputsCrit() now returns FUN_CRIT as a character string.
• An example is addeed to illustred the use of the plot.OutputsModel() function.

### 1.2.13.16 Release Notes (2019-04-03)

#### New features

• CreateInputsCrit() now presents a VarObs argument in order to allow to prepare an InputsCrit object in order to run a criterion on other variables than observed discharges with the ErrorCrit() function (at the moment SCA and SWE).
• CreateInputsCrit() can now prepare an InputsCrit object in order to compute a single criterion (Single class), multiple criteria (Multi class) or a composite criterion (Compo class) with the ErrorCrit() function.
• CreateInputsCrit() now presents a Weights argument in order to allow to prepare an InputsCrit object in order to compute a composite criterion (Compo class) with ErrorCrit() or Calibration_Michel().
• CreateInputsCrit() now returns a idLayer element to indicate which layer(s) to use for SCA or SWE aggregation.
• CreateInputsCrit() now presents a warnings argument to replace the verbose action (the verbose argument is kept to print messages).
• In CreateInputsCrit(), it is now possible to set the following arguments as atomic (as before) or as list: FUN_CRIT, VarObs, Obs, BoolCrit, transfo, Weights. If the list format is chosen, all the lists must have the same length.
• CreateRunOptions(), CreateIniStates() and CreateCalibOptions() now present a IsHyst argument to give the possibility to use the Linear Hysteresis with CemaNeige. The objects returned present an hysteresis class.
• CreateRunOptions() now presents a warnings argument to replace the verbose action (the verbose argument is kept to print messages).
• Added TransfoParam_CemaNeigeHyst() function in order to take into account transformation of the parameters of the CemaNeige module when the Linear Hysteresis is used.
• Added the X0310010 dataset to run the examples using the Linear Hysteresis with CemaNeige (it contains necessary SCA data).
• Added the ‘cemaneige_hysteresis’ vignette to explain how to manage the use of the Linear Hysteresis with CemaNeige.

#### Deprecated and defunct

• The Qobs argument is now deprecated in CreateInputsCrit() and has been renamed Obs.
• The FUN_CRIT argument is now deprecated in ErrorCrit(). This function now gets this information from the InputsCrit argument.
• The FUN_CRIT argument is now deprecated in Calibration_Michel(). This function now gets this information from the InputsCrit argument.
• The plot_OutputsModel() had been deprecated in ‘airGR’ 1.0.4 (it had been replaced by the use of plot.OutputsModel() or plot()) and is defunct now.

#### Major user-visible changes

• CreateInputsCrit() now return a list of InputsCrit (each element is of the Single class) in the cases of multiple or a composite criteria.
• ErrorCrit_*() functions now return an error message if the InputsCrit object is of class Multi or Compo.
• ErrorCrit() function can now run on a multiple or a composite InputsCrit. In these cases, it returns a list of ErrorCrit.
• ErrorCrit() and ErrorCrit_*() functions can now assess Q, SCA or SWE simulations.
• Calibration_Michel() function can now run on a composite InputsCrit. It returns a composite value of error and the formula used to calculate it.
• Model diagrams added in documentations of RunModel_GR4J(), RunModel_GR5J() and RunModel_GR6J() functions.
• It is now possible to be redirected to the plot.OutputsModel() documentation with ?plot.
• It is now possible to use a character vector for all FUN_* arguments (in addition to function objects) in the following functions: Calibration(), Calibration_Michel(), CreateCalibOptions(), CreateIniStates(), CreateIniStates(), CreateInputsCrit(), CreateInputsModel(), CreateRunOptions(), ErrorCrit(), RunModel() and TransfoParam().

#### Minor user-visible changes

• ErrorCrit_*() functions now return objects of class ErrorCrit and NSE, KGE, KGE2 or RMSE.
• .FortranOutputs() private function added to manage Fortran outputs.
• Outputs of frun_GR2M Fortran subroutine were reordered.
• DataAltiExtrapolation_Valery() now returns named elements of lists relative to elevation layer.
• Calibration() function now returns an error message if FUN_CALIB is not a function.
• Inputs of PEdaily_Oudin() are now checked.
• PEdaily_Oudin() example corrected (the Julian day was one day too early).
• plot.OutputsModel() does not return a warning message anymore when Qobs = NULL.
• Inputs of TransfoParam*() functions are now checked.
• The order of authors has been updated in the DESCRIPTION and the CITATION files.

#### CRAN-compatibility updates

• Tabulations removed, unused variables removed and variable statements fixed in Fortran files.

### 1.0.15.2 Release Notes (2018-10-10)

#### Bug fixes

• Fixed bug in CreateRunOptions(). The function now accounts correctly for leap years when no warm-up period is defined.

#### Minor user-visible changes

• CreateRunOptions() was cleaned up, with no effect on its outputs.

#### CRAN-compatibility updates

• The vignetteParam*.rda datasets moved to the inst directory. It contains different objects needed for ‘param_optim’ and ‘param_mcmc’ vignettes.

### 1.0.14.1 Release Notes (2018-09-28)

#### New features

• PEdaily_Oudin() now presents a LatUnit argument which allows to choose the unit of the latitude (radians and degrees).

#### Deprecated and defunct

• The LatRad argument is now deprecated in PEdaily_Oudin() and replaced by the Lat argument.
• The unused Ind_zeroes argument of the CreateInputsCrit() function is now deprecated.
• The verbose argument is now deprecated in CreateInputsCrit() and replaced by the warnings argument.

#### Major user-visible changes

• Calibration_Michel() is now faster during the grid-screening step when a parameter is set using FixedParam in CreateCalibOptions().
• CreateCalibOptions() now returns an error when all the parameters are set in the FixedParam argument and a warning message when all the parameters are free (NA) in the FixedParam argument.
• CreateInputsCrit() now returns an error when epsilon is not positive.
• CreateInputsCrit() now returns a warning message in the following case: there are zeroes values in Qobs, epsilon = NULL and transfo = log or inv.
• ErrorCrit_*() functions now return a warning message in the following case: there are zeroes values in Qobs or Qsim, epsilon = NULL and transfo = log or inv.

#### Minor user-visible changes

• Several functions of the package were cleaned up or slightly modified, with no effect on their outputs.
• Dubious Qls and Qmm values set to NA values between 1997-01-05 and 1997-01-21 in the L0123001 dataset.
• ORCID numbers are now joined to the names of the authors of the package.

#### CRAN-compatibility updates

• Function name changed in a vignettes to avoid error during the check on Debian distribution
• As recomanded by CRAN managers, the NEWS file is now at the text format and is no more just a link to the ‘airGR’ Website
• Added the Vignette_Param. datasets in order to reduce runtime during the re-building of vignettes. It contains different objects needed for param_optim and param_mcmc vignettes.

### 1.0.10.11 Release Notes (2018-06-29)

#### Bug fixes

• Fixed bug in RunModel_GR2M(). The function now returns the total precipitation (P) instead of the net rainfall (P1).

#### Major user-visible changes

• RunModel_GR2M() now returns more explicit precipitation outputs names.
• CreateInputsCrit() now returns a warning message when the KGE (or KGE’) is used with a log transformation on flows.
• The article reference is corrected.

#### Minor user-visible changes

• The documentation and help of several functions were improved.

### 1.0.9.64 Release Notes (2017-11-10)

#### New features

• An article describing the ‘airGR’ package has been published. Its reference has been added and will be displayed with citation("airGR").
• Added CreateIniStates() function in order to help user to format the IniStates argument for CreateRunOptions().
• Added the Param_Sets_GR4J dataset. It contains generalist parameter sets for the GR4J model.
• Three vignettes have been added. They are relative to different calibration methods (including the generalist parameters sets of the GR4J model).

#### Deprecated and defunct

• The RunSnowModule argument is now deprecated in CreateRunOptions().

#### Bug fixes

• Fixed bug in RunModel_GR4H(): in frun_GR4H Fortran subroutine, St(2) is now set to 0 (instead of St(1)) when St(2) < 0.
• Fixed bug in plot.OutputsModel() for the regime plot when the period is less than 1 year.
• Fixed bug in plot.OutputsModel() when there is no common data to plot the cumulative frequency or the correlation QQ.
• Fixed bug in plot.OutputsModel() for the y-axis labelling of flows time series when log_scale = TRUE and BasinArea is used.

#### Major user-visible changes

• RunModel_GR4J(), RunModel_GR5J() and RunModel_GR6J() (and CemaNeige_GR*J()) now return Ps, Pn and actual exchanges. See the model Fortran codes for more details about the calculation of these variables.
• CreateInputsModel() now returns an error when DatesR contains duplicated values.
• RunModel_GR5J now returns StateEnd in the same order as the other models.

#### Minor user-visible changes

• plot.OutputsModel() now returns a warning message when the length of Qobs is different from the length of Qsim.
• The X1 parameter from GR4H, GR4J, GR2M, GR5J and GR6J, the X3 parameter from GR4H, GR4J, GR5J and GR6J and the X6 parameter from GR6J are now set to 1e-2 when they are fixed to lower values. RunModel_*() functions now return a warning message in this case. RunModel_*() functions now return a warning when X4 < 0.5 and its value is set to 0.5.
• The commands ?L0123001, ?L0123002 and ?L0123003 now return the documentation page related to BasinObs.
• Many functions of the package were cleaned up or slightly modified, with no effect on their outputs.
• The documentation and help of several functions were improved.

#### CRAN-compatibility updates

• “airGR.c” file registers native routines.

### 1.0.5.12 Release Notes (2017-01-23)

#### New features

• DataAltiExtrapolation_Valery() and CreateInputsModel() now present a PrecipScale argument which allows rescaling precipitation when it is interpolated on the elevation layers when CemaNeige is used.

#### Bug fixes

• Fixed bug in DataAltiExtrapolation_Valery(). The elevation gradients for air temperature returned by CreateInputsModel() are improved.

#### User-visible changes

• DataAltiExtrapolation_Valery() has been improved. DataAltiExtrapolation_Valery() now runs faster (and by consequence CreateInputsModel() too, when CemaNeige is used).

### 1.0.4 Release Notes (2017-01-18)

#### New features

• RunModel_CemaNeige(), RunModel_CemaNeigeGR4J(), RunModel_CemaNeigeGR5J() and RunModel_CemaNeigeGR6J() now return air temperature for each elevation layer.

#### Deprecated and defunct

• S3 plot method defined for OutputsModel objects. It means that the plot_OutputsModel() function is deprecated and his use has been replaced by the use of plot.OutputsModel() or plot().
• In plot.OutputsModel() the PlotChoice argument is deprecated and has been renamed which.

#### User-visible changes

• plot.OutputsModel() displays air temperature time series for each layer when CemaNeige is used (argument which = "Temp" or "all").

### 1.0.3 Release Notes (2016-12-09)

#### New features

• ErrorCrit_*() functions gain a warnings argument to replace the verbose action and the verbose argument now prints the criterion value(s).

#### Bug fixes

• Fixed bug in CreateCalibOptions() when StartParamList or StartParamDistrib arguments are used.

#### User-visible changes

• CreateInputsModel() now returns an error if NLayers <= 0 when CemaNeige is used.
• plot_OutputsModel() now displays raw values on the y-axis when the discharge time series is represented with log scale (formerly, log values of discharges were displayed on the y-axis).

### 1.0.2 Release Notes (2016-11-03)

#### New features

• SeriesAggreg() gains a TimeLag argument that corresponds to a numeric value indicating a time lag (in seconds) for the time series aggregation (useful to aggregate hourly time series to the daily time step for instance). In addition, the function now accepts input dates in both POSIXt formats (POSIXct and POSIXlt). The output is in POSIXct format.
• plot_OutputsModel() gains a log_scale argument in order to plot the flow with a log scale.
• A tutorial is available online on the following link: https://hydrogr.github.io/airGR/. It can also be displayed with the vignette("airGR") command.

#### Deprecated and defunct

• CreateCalibOptions() loses the OptimParam argument that was redundant with the FixedParam argument. The Calibration_Michel() was modified to take into account this change by using directly FixedParam, but this is transparent to the user.
• CreateCalibOptions() loses the StartParam argument that was not used.

#### Bug fixes

• The value sort for the transfo argument of CreateInputsCrit() was not taken into account. It is now fixed.

#### Major user-visible changes

• The RunModel_GR6J() and RunModel_CemaNeigeGR6J() models were modified back to versions previous to 1.0.1 to prevent from unwanted efficiency criteria deterioration related to the calibration with Calibration_Michel(). The actual model codes were not modified but the TransfoParam_GR6J() and CreateCalibOptions() functions were modified regarding the X5 parameter. It is strongly advised to use airGR 1.0.2 for the RunModel_GR6J() and RunModel_CemaNeigeGR6J() functions if you are using Calibration_Michel(), as they are much more efficient. In case you were using your own calibration algorithm, you will not notice any difference.

#### Minor user-visible changes

• CreateInputsModel() and DataAltiExtrapolation_Valery() functions now allow both POSIXt formats (POSIXct and POSIXlt).

### 1.0.1 Release Notes (2016-04-21)

#### Deprecated and defunct

• The Calibration_HBAN() and DataAltiExtrapolation_HBAN() functions have respectively been renamed as Calibration_Michel() and DataAltiExtrapolation_Valery() after the names of their creators.
• The Calibration_optim() function has been removed from the package.
• The silent mode is now defined by the verbose = TRUE argument (formerly quiet = FALSE) in the following functions: Calibration(), Calibration_Michel(), CreateInputsModel(), CreateRunOptions(), DataAltiExtrapolation_Valery(), ErrorCrit(), ErrorCrit_KGE(), ErrorCrit_KGE2(), ErrorCrit_NSE(), ErrorCrit_RMSE(), plot_OutputsModel(), SeriesAggreg().

#### Major user-visible changes

• The GR5J model has been modified: previously, two unit hydrographs were used, now only one is remaining. As a consequence, simulations from the GR5J (RunModel_GR5J() function) and CemaNeige (RunModel_CemaNeigeGR5J() function) models will be different.
• An important proportion of the transformations of the parameters have been modified (TransfoParam_*() functions). Since this modifies the local search, calibration results will be different .
• The quantiles of the parameters have been recalculated with the new transformations (CreateCalibOptions() function). Since these quantiles constitute the starting point of the calibration algorithm, calibration results will be different.

#### Minor user-visible changes

• The Fortran model core codes have been modified:
• optimisation of the codes for fastening of computation;
• simplification of the internal variables for easier reading and understanding.
• The list of the contributors and authors is now full.
• The references of the package has been updated; they are returned by the following R-command citation("airGR").

### 0.8.1.2 Release Notes (2015-08-21)

#### Bug fixes

• Fixed bug in CreateInputsModel() that was related to the handling of missing values.
• Fixed bug in CreateRunOptions() that prevented the correct use of the IniResLevels argument (to manually set the filling rate of the production and routing stores).

#### Minor user-visible changes

• Removal of an unnecessary warning when IndPeriod_WarmUp = 0.

#### CRAN-compatibility updates

• Modification of namespace file to ensure proper use under linux without compilation issues.

### 0.8.0.2 Release Notes (2015-04-15)

#### New features

• Three new hydrological models: RunModel_GR4H() function for GR4H (hourly), RunModel_GR2M() function for GR2M (monthly) and RunModel_GR1A() function for GR1A (yearly).
• New function SeriesAggreg() to easily aggreg timesteps.

#### Bug fixes

• Fixed bug in ErrorCrit_RMSE() which led to incorrect calibration (the criterion was maximised instead of minimised).

#### Major user-visible changes

• Update of the functions CreateRunOptions(), CreateCalibOptions() and plot_OutputsModel() to handle the new models.
• Modification of CemaNeige Fortran code to add an update of Gratio after the SnowPack update (no impact on snow simulation).

#### Minor user-visible changes

• Improvement of the plot_OutputsModel() function to allow a selection among available plots.
• Minor update in ErrorCrit_KGE() and ErrorCrit_KGE2() to handle case when only one values in not NA.
• Update of the scripts in airGR-advanced-example to match the structures of the BasinData objects.
• Correction of formatting issue in airGR-advanced-example regarding the “List_HypsoData.txt” file.

### 0.7.4 Release Notes (2014-11-01)

#### New features

• New argument in many functions (quiet = TRUE or FALSE) to choose if the warnings should be suppressed or not.

#### Deprecated and defunct

• The CalibrationAlgo_*() functions were renamed into Calibration_*().

#### Bug fixes

• Fixed bug in CreateCalibOptions() to handle models with only one parameter.
• Fixed bug in Calibration_HBAN(). The function was not working properly with models having only one parameter.

#### Major user-visible changes

• CemaNeige users must now specify one MeanAnSolidPrecip for each elevation layer. The CreateRunOptions() function is impacted.
• CemaNeige users can now specify the mean elevation of the input series (before it was always considered equal to the catchment median elevation). The impacted functions are CreateInputsModel() and DataAltiExtrapolation_HBAN().
• New architecture with better format verification procedure (using classes) and simpler setting of default configuration.
• New architecture where the model, calibration and error functions are in the arguments of the functions (the exotic use of “generic function” created by the users has been removed).
• Improved documentation and examples.

#### Minor user-visible changes

• Improvements allowing the arrival of new models.
• Improvements of the argument verifications in CreateInputsModel(), CreateRunOptions(), CreateInputsCrit(), CreateCalibOptions().
• Improvements of all the ErrorCrit() functions to better account for the cases with constant flow values or local zeros.
• Improvement of the plot_OutputsModel function (to handle 0 in Qobs and Qsim).
• Improved documentation.

### 0.6.2 Release Notes (2014-02-12)

#### New features

• Additional functions for results plotting (the ‘zoo’ package is required for some of them).
• Add multi-objective calibration using nsga2() (the ‘mco’ package is required).
• The field Multiplier has been added in the ErrorCrit() outputs, to indicate whether the criterion is an error (to minimise) or and efficiency (to maximise). This allows to provide real efficiency values in the outputs e.g. NSE[Q] instead of (-1) × NSE[Q].

#### Deprecated and defunct

• EfficiencyCrit() have been replaced by ErrorCrit() to avoid misunderstanding (by default, the algorithms minimise the error criterion).

#### Bug fixes

• RC11 bug correction: the automatic selection of the warm-up period was not working properly when no data was available from warm-up (i.e. when the user had set the run to start at the very first index).
• RC10 bug correction: the CalibrationAlgo_HBAN() function was not working in the very rare case when the diagonal search was activated and lead to a set outside the authorised range.
• RC9 bug correction: the CalibrationAlgo_HBAN() function was not working properly with models having only one parameter.
• RC8 bug correction of the ModelDefaultIniOptions() function (this bug was introduced in the RC7 and caused an error when IndPeriod_WarmUp = NULL.
• RC7 bug correction of the ModelDefaultIniOptions() function (the automatic selection of one year for warm-up was not handling properly missing data).
• RC6 correction of the help files (the description of CemaNeige parameters were inverted).
• RC5 differs from previous releases in the way the data are read and stored (in a list instead of individual vectors). The package is similar, only the examples of Main and the files in MyScriptBlocks have changed. All basin data are now stored inside a list named BasinData. This will greatly ease the future use of Rdata files (instead of txt files) as storage format for the time series of observation.

#### Major user-visible changes

• The definition of the generic function is now made in a much simpler way (e.g. see DefineFunctions_Model() or DefineFunctions_ErrorCrit()).

#### Minor user-visible changes

• Code improvements to reduce the computation time.
• Clearer instructions for the adding and modification of a model.
• Improvements of the documentation.

### 0.5.2 Release Notes (2014-02-05)

#### Deprecated and defunct

• The SelectPer arguments are replaced by IndPeriod to ease understanding.
• The PE arguments are replaced by PotEvap() to ease understanding.
• The Fsol arguments are replaced by FracSolidPrecip to ease understanding.

#### Major user-visible changes

• R <= 2.15 in not supported by default.
• The check that SelectPer_Run() is continuous is now made in the CheckArg() functions.
• Check of the model functioning time step.
• Name of the calibration criterion provided in OutputsAlgo().

#### Minor user-visible changes

• Missing values in Fortran are now -999.999 instead of -9.999.

### 0.5.1 Release Notes (2014-01-27)

#### New features

• New EfficiencyCrit_NSE_sqrtQ() function to compute NSE criterion on sqrt flows.

#### Bug fixes

• Incorrect arguments in the call to RunModelAndCrit from CalibrationAlgo_optim_stats and CalibrationAlgo_nlminb_stats.
• CalibrationAlgo_nlminb_stats argument was wrongly defined in DefineFunctions_CalibrationAlgo() (optim instead of nlminb).
• Format checking for RunOptions was incorrectly made in CheckArg() function.