metab_Kmodel models use initial daily estimates of K, along with
predictors such as Q (discharge.daily), U (velocity.daily), or T (time),
to leverage all available data and produce more stable daily K estimates.
See also
Other metab.model.classes:
metab_bayes-class,
metab_mle-class,
metab_model-class,
metab_night-class,
metab_sim-class