b.e21.BHIST_BPRP.f09_g17.CMIP6-esm-hist.002.clm2.h0.
and
b.e21.BHIST.f09_g17.CMIP6-historical.010.clm2.h0.

Set 9 Description: Line plots, tables, and maps of RTM river flow and discharge to oceans
'D_' denotes a variable derived from two or more history file variables (lnd_func.ncl)
'C_' denotes a CASA model variable.