The Ballad Index also lists "The Wild Rippling Water" from these sources: Austin E. and Alta S. Fife, Cowboy and Western Songs (1969) and Matthew Hodgart, editor. 1965. The Faber Book of Ballads, but given their late dates I'd bet they both got it from the Lomaxes.

The title must be someone's recent creative input -- the phrase does not appear in the song lyrics at all.