HYDRUS-H1 Model

Original source

Fortran source files were converted to C files using f2c. NOTE: Per instructions on source page, lines depending on MSFLIB (Microsoft PowerStation) were commented out - should not affect model.

Other packages

hyrdusR

Originally, we planned to embed the FORTRAN code directly within R and avoid the stand-alone application. We would then pass the input parameters and data directly from R objects to the FORTRAN code and run the HYDRUS1D simulations. This would avoid modifying the input files with the new values of the parameter settings.

Unfortunately, the HYDRUS1D code doesn't simply read the input files and then later compute derived values. Instead, these steps are understandbly combined. This makes it less feasible to merely pass the inputs from R.

However, this package does make small but helpful changes to the HYDRUS1D code that is loaded into R. The R user can specify the full path to each input file. This means that they don't have to be called, e.g. SELECTOR.IN and all have to be in the same directory. Instead, the names of the input files can have identifying characteristics. Also, we can use input files from different directories related to do different scenarios and or projects.

The R user can specify an R function (or a C routine) that is called at the end of each iteration of the simulation.

There are many opportunities to provide much richer access to the HYDRUS1D code and its functionality from R. This will, at times, involve changing some of the HYDRUS1D code.