The obstacle to making a river is usually getting the water uphill to begin with. Regular cloud seeding of moist air currents that would otherwise head out to sea? Modifying land albedo to change airflow patterns? That's all dubious, but I can't think of any other ideas for starting a new river with new water.
If you've got a situation where the water you want to flow is already "uphill", then the technology is simply digging, and if you wanted to do enough of it you could make whole new seas.
Fair point-- I was thinking in terms of something more dramatic involving tectonics.
This thread is intended to provide a space for 'crazy' ideas. Ideas that spontaneously come to mind (and feel great), ideas you long wanted to tell but never found the place and time for and also for ideas you think should be obvious and simple - but nobody ever mentions them.
This thread itself is such an idea. Or rather the tangent of such an idea which I post below as a seed for this thread.
Rules for this thread:
If this should become a regular thread I suggest the following :