"Cool, Cool Water"

In "Cool, Cool Water," there's the line "From the mountains on down to the sea" (this is specific to the Sunflower version; this section isn't in the SMiLE Sessions versions).  I'm not sure if this line is meant to describe the journey that water makes or whether it identifies the variety of locations in which "Cool water keeps on coolin' me."  If it's the second reading, though, "From the mountains on down to the sea" is a merism.