Inquiry about the difference in routing physical processes between UDMP-on and UDMP-off configurations in WRF-Hydro

[zed li]

Hello everyone,

I am currently working with the WRF-Hydro model, and I am using the Muskingum-Cunge method for channel routing. I have a question regarding the hydrological processes when the User-Defined Mapping (UDMP) option is enabled versus disabled.Aside from the differences in sub-basin delineation and river network structure, I would like to know whether there are any differences in the physical processes of routing between these two configurations.

Thank you very much for your time and assistance.

Best regards,

Zed Li

[Arezoo RafieeiNasab]

Hi Zed, 

If we use the UDMP, it will use a different code routine that was initially intended for the National Water Model, however the underlying processes should remain the same. Without UDMP, the routing is done through the drive_CHANNEL subroutine while with the UDMP, it will call drive_CHANNEL_RSL. However, when routing the water, both call the same subroutine SUBMUSKINGCUNGE. I hope this helps!

Thanks!

Arezoo

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Arezoo Rafieei Nasab, Ph.D.

Scientist V

NSF NCAR Research Applications Laboratory

are...@ucar.edu