building WRF HYDRO with NOAH NWM

[jbensabat]

Hello
I am trying to build WRF HYDRO with NOAH and parallel option
for this there is a (this is my understanding) to define MPP_LAND during the building process
looking at the code of the driver Noah_hrldas_driver.f I see another preprocessor variable PARALLEL
so here are the questions

do I need to set both ?
if not what is the difference between them ?
which one should I set
best
jac

[scrasmussen]

Hi @jbensabat ,

Are you specifically trying to build with Noah for some reason? Because for a stand-alone model you would want to build with NoahMP. The easiest and quickest way to do this is to look at the BUILD.md file and follow the CMake instructions.

The default build is a parallel build which is as easy to do as:

$ mkdir build
$ cd build
$ cmake ..
$ make -j 4

If you have any other questions just let us know!

[jbensabat]

Good morning and thanks for your message.
I am learning the code and I think (at least thought) that using NWM first could be a good primer for the understanding of the results (simpler LSM)
I built the NWMMP version and could run it.
I have built the NWM version but there seem to be a number of of problems. one of them I am dealing with is in routine
subroutine output_chrt_NWM(domainId) file module_NWM_IO.f

if(myId .eq. 0) then
if(nlst(domainId)%channel_option .ne. 3) then
! Read in index values from Routelink that will be used to sort output
! variables by ascending feature_id.

     **iret = orchestrator%IO_Manager%netcdf_layer%open_file(trim(nlst(1)%route_link_f),NF90_NOWRITE,ncid=ftnRt)**

in this call netcdf_layer is a NULL pointer causing the program to crash

     !iret = nf90_open(trim(nlst(1)%route_link_f),NF90_NOWRITE,ncid=ftnRt)
     call nwmCheck(diagFlag,iret,'ERROR: Unable to open RouteLink file for index extraction')
     iret = nf90_inq_varid(ftnRt,'ascendingIndex',indVarId)
     if(iret .ne. 0) then
        call postDiagMsg(diagFlag,'WARNING: ascendingIndex not found in RouteLink file. No resorting will take place.')
        ascFlag = 0
     endif
     if(ascFlag .eq. 1) then
        iret = nf90_get_var(ftnRt,indVarId,chIndArray)
        call nwmCheck(diagFlag,iret,'ERROR: Unable to extract ascendingIndex from RouteLink file.')
     endif
     iret = nf90_close(ftnRt)
     call nwmCheck(diagFlag,iret,'ERROR: Unable to close RouteLink file.')
  else
     ascFlag = 0
  endif

I have observed that there are differences between version 5.2 from the tarball and the one in the GITHUB
this is the rationale for my question
best
jac