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[JerDGold]

So I'm working on a fort with a brook that runs through my above ground level, so I can keep my animals grazing etc... during a siege.  Also because my embark spot has a brook running through it and I still want to make a nice, big, square symmetrical fort as usual.

Can I build walls over the brook? Do I need to place a floor/something else first? Make sense?

[GiglameshDespair]

I would think you could just build a wall over it. If not, excavate the top 'layer' of the brook and then build walls.

[JerDGold]

Yes, you are correct.  Normally I would have just tried it w/out asking, but I really didnt want one of my starting seven to drown before my first caravan/migrant wave arrived.

[joeclark77]

A "wall" includes a floor, so you can just build walls.  However, you'll need a floor to stand on, if you're going to build a wall in the middle of a river.  Usually I build bridges like this:

(O=wall, +=floor, ~=water)

Code: [Select]

.........
~~O+++O~~
~~O+++O~~
~~O+++O~~
~~O+++O~~
.........
Floors first, then walls to prevent reduce dumb dodging dwarf death.

By the way, if you puncture a cavern, you will get fungus growing in your soil layers, so your grazers can graze indoors.

[Quietust]

A "wall" includes a floor, so you can just build walls.  However, you'll need a floor to stand on, if you're going to build a wall in the middle of a river.

Read the original post more closely - he's dealing with a brook, and brooks have floors built into them.

In fact, in this situation, brooks have the added advantage that they can protect you from creatures that would otherwise jump into the water, swim under your walls, and then emerge inside your fortress.

[Abadayos]

down side to brooks however is the inability to make choke points for non-flyers/swimmers and to me that is annoying.

[wierd]

Easily resolved by channeling into the brook. This creates a "stream/river" type obstacle. If connected to the edge of the map (somehow-- say, through a fortification slit) it will even flow just like a stream. This is very useful if you want to use the brook as a safe water generator source (much safer than a river source tile!) and have access to magma for casting with.  You can channel out the brook, cast magma into the channel to make obsidian in the channel, leave a plug, then mine out the rest of the channel, and dig the fortification at the edge of the map.  Simply "uncork" the channel when everything is ready.

Brooks are very useful map features. You can do a lot more with brooks than you can with a normal river source, if you use it creatively.