doc_range() returns the minimum and maximum DOC concentrations for which
the Kd model is valid. doc_range_check() checks a DOC value against that
range, and replaces it with the nearest limit (with a warning) if it falls
outside.
doc_range() returns the minimum and maximum DOC concentrations for which
the Kd model is valid. doc_range_check() checks a DOC value against that
range, and replaces it with the nearest limit (with a warning) if it falls
outside.