If you're going for a no water scenario, why are you not grabbing a water pump mod?
Thematically, tiberium into water makes little sense. Mechanically, it should only be used in that specific scenario, which means we would need to be limiting it to it somehow.
Tiberium is not meant to make "free" resources. Water falls under that 99% of the time, and doing something for that 1% is, frankly, a waste of effort. There are already a multitude of mods that add a 'place anywhere water pump' that fully work fine. No point reinventing the wheel.