As this is in User Critiques, don't write my comments off as curmudgeonly...
I think I'm missing what you see in this photograph: a green,herbaceous plant set against rock, albeit textured and very interesting rock with some great lines. As an objective viewer, though, this concept seems pretty common and can be found in a number of places whether a river is in full spate or dried up. With no context, this is "any river", so the fact there is greenery in, from what I gather, a dry year, to me anyway, is meaningless without context. And context should be provided by the photograph, not a written commentary.
Try going wider to actually show us a riverscape and not just a plant with rocks. If the riverscape is dry, then this plant has more meaning than it has in this iteration. If you get down closer to the plant level (rather than shooting down to it) and "place" it less centrally, the green plant becomes a foreground anchor in the wider, drier, more austere landscape.
Also, processing to slightly accentuate the green-ness of the plant, de-saturating the rock say 20 to 40%, and slightly brightening the photograph overall may help to give it more impact as well by accentuating your intent. I keep using the word "slightly" because often that's all it takes.
My 2 cents, anyway.
