Reach-based channel flows not sensitive to perturbations in idealized forcing (FORC_TYP 4)

[jmccreight]

(This is for master branch.)

On the left, my editor shows that I multiply the idealized precip by 5. (I then compile and run a regression test against my Boulder Domain for 24 hours where there is just 1x idealized precip - standard master branch).
On the right, the results of the regression test show only differences with 1x precip are
accLndRunOff & accQLateral. The channel flows do not change (they are not reported, they are bfb matched).

I did note, however, this is apparently NOT the case for FORC_TYP=1. There are difference in many variables when that precip is multiplied (by a factor >1).

[jmccreight]

Same problem for Boulder Creek with NLDAS forcings. (Which makes sense) Might be the domain.

[rcabell]

Closing due to lack of activity and no specific cause and/or fix identified.