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[Greiger]

The image in the spoiler shows a major river in dwarf mode sourced from the corner of the playing area.  Unfortunately the river isn't walled on the edge it's touching that isn't the north.  Causing the river to drain off the map early, and becoming very shallow to completely dry downriver.

Spoiler (click to show/hide)

The river is sourced from the north and is draining off immediately to the east instead of following the path. 

As appealing as culling the fish population sounds it does kinda reduce the coolness of the site.  Won't be as cool to have a large bridge crossing a sorta muddy valley as it is a fast moving river.  And no, I don't have an infinite magma source, so replacing the river with magma is out of the question.

I did some searching and didn't find anything else mentioning this, but it's possible I put in the wrong search terms, so please ignore me if this is mentioned already.

[Derakon]

If you did have magma, another solution would be to drop some on the edge to form obsidian walls, which would prevent the river from draining. Trying to construct walls the hard way would be a fairly monumental undertaking, though.

[Greiger]

I do have some, but it's only a pool I'm afraid, and there isn't enough to really make it over there.

After posting I did work around it myself somewhat undwarvenly using tweak by turning the part of the river touching the east end of the map into river source as well, but I imagine it would be annoying to somebody who doesn't know how/want to use those tools. EDIT: Kinda amusing watching as the sudden wall of water washed all the airdrown fish and indignant hippos downriver.

P.S. I did also consider walls before posting, but I couldn't build them close enough to the edge to be effective.

[Quietust]

If you're willing to use dtil, you could do it properly and just spawn tiles of 7/7 magma immediately above the river at those edges, then let it fall in and make obsidian. This would also have the advantage of not unnaturally increasing the river's flow rate.

[Greiger]

I didn't think of doing that, and I could have done that with the same tool I used to make the river sources (for each tile).  And I suppose that would have been more dwarvenly. But now I probably have the risk of spontaneous river explosion if I ever accidentally dig into it.  That sounds dangerous enough to make up for it. heh.

[Dante]

Well, if they're now wall tiles, you shouldn't be able to dig into them, right?

[Eagle]

They're now river source tiles. Which means he has (at a rough estimate using the pic) about 100 river source tiles constantly spawning water.

[Dante]

No no, I meant in response to

If you're willing to use dtil, you could do it properly and just spawn tiles of 7/7 magma immediately above the river at those edges, then let it fall in and make obsidian. This would also have the advantage of not unnaturally increasing the river's flow rate.

I didn't think of doing that, and I could have done that with the same tool I used to make the river sources (for each tile).  And I suppose that would have been more dwarvenly. But now I probably have the risk of spontaneous river explosion if I ever accidentally dig into it.  That sounds dangerous enough to make up for it. heh.

River source + magma -> wall tile, i.e. tile at the edge of the map, so it can't be designated to be dug out again. So you can't accidentally dig into it.

[Eagle]

No no, I meant in response to

If you're willing to use dtil, you could do it properly and just spawn tiles of 7/7 magma immediately above the river at those edges, then let it fall in and make obsidian. This would also have the advantage of not unnaturally increasing the river's flow rate.

I didn't think of doing that, and I could have done that with the same tool I used to make the river sources (for each tile).  And I suppose that would have been more dwarvenly. But now I probably have the risk of spontaneous river explosion if I ever accidentally dig into it.  That sounds dangerous enough to make up for it. heh.

River source + magma -> wall tile, i.e. tile at the edge of the map, so it can't be designated to be dug out again. So you can't accidentally dig into it.

Ah, i misunderstood you. But he said earlier that he had made them into source tiles, and wasn't going to change them anymore.

[Greiger]

I was talking about since my fortress proper is so close to the river if I ever accidentally puncture the river while digging my fortress everything would flood almost instantly thanks to all the river source tiles. A river explosion.

[forsaken1111]

You say that like it's a bad thing...