It's a few thousand kilometres North to the ocean... if I'm reading the maps right. But Hellas itself is so deep (7km in parts) that rainwater running off the surrounding highlands would probably naturally begin to fill the basin... once it starts raining on Mars anyway. It'd take a while for it to full naturally... mind.
But it'd also take just as long to build a thousand-kilometre long canal deep enough. It'd need to be a couple of kilometres deep at points.
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--m(^0^)m-- Wot, no sig?
But it'd also take just as long to build a thousand-kilometre long canal deep enough. It'd need to be a couple of kilometres deep at points.
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--m(^0^)m-- Wot, no sig?