Prescribing irrigation for single point CLM5 case

[odombro]

Hi everyone,
I want to modify the source code of CLM5 to prescribe irrigation from a measured irrigation timeseries for a single point case with my own atmospheric forcings and using BGCcrop.
I am wondering what would be the best strategy to go about this. I am thinking of creating a separate netcdf file with irrigation data that is read in by the irrigation routine. This may be similar to how prescribed soil moisture is read in but I am uncertain about the steps I should take and which parts of the code I could reuse for this development?
Many thanks in advance for any advice on this.

 

[oleson]

Yes, it seems like the "streams" capability in CLM is what you would start with. There are several examples; nitrogen deposition, soil moisture, population density, lai, etc. Nitrogen deposition, for example, is handled by src/main/ndepStreamMod.F90. I also used the lai stream example recently to create an "urbantv" stream. urbantv is handled by src/biogeophys/UrbanTimeVarType.F90.
You'll also need to add some things to the namelist functionality. For the urbantv example, see bld/namelist_files/namelist_definition_clm4_5.xml, bld/namelist_files/namelist_defaults_clm4_5.xml, and bld/namelist_files/CLMBuildNamelist.pm.

 

[odombro]

Thanks a lot for the advice Keith. I will have a look into those files. As far as I know all streams files are global files. Is it possible to use this option but provide only data that correspond to my single point case, so no global file?

 

[oleson]

As far as I know, that should work.