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[Internet Kraken]

Use pumps 

I, uh, don't know how to use pumps. 

That would explain the lack of pumps in the project.  Pumps require a Giant Corkscrew, a Pipe Section, and a Block of some type.  The quickest and easiest way to make the parts needed is in a Carpenter's Workshop.

You need 2 solid tiles to build the pump on, and it takes water in the "pump from" end and spits it out the other end.  The place to put would be at the uppermost part of the wall where you're letting the ocean into your moat, since it will have 2 tiles to sit on, and will be able to grab water from the ocean and dump it into the moat.  Set the pump to start being pumped by a dwarf (must have the "Pump Operating" labor enabled) and you will see a torrent of water issue forth from the pump.

Pumps are INCREDIBLY powerful.  They are the best way to move large volumes of water in DF, since natural flow takes so darned long.  Water is apparently a fairly viscous substance.

It's probably really bad that I didn't understand a word of that.

God I hate pumps.

[TolyK]

carve the thing lower 1 z-level, then breach the ocean 1 z-level lower. pressure will do its thing.

[veok]

carve the thing lower 1 z-level, then breach the ocean 1 z-level lower. pressure will do its thing.

Heh, that's what I suggested in the Escapist Thread. Ultimately, it might be a losing battle though -- with a "HOT" climate, summer's going to take it's toll on *all* exposed water tiles.

[evileeyore]

On the "river side" you're losing water back into the river.

On the "ocean side" you're losing pressure because the water is "squeezing" through diagonals which removes the pressure.


You've really only got two easy options:  A) channel out those diagonal blocks on the ocean side or B)install floodgates/damn the river to increase pressure.

[TolyK]

carve the thing lower 1 z-level, then breach the ocean 1 z-level lower. pressure will do its thing.

Heh, that's what I suggested in the Escapist Thread. Ultimately, it might be a losing battle though -- with a "HOT" climate, summer's going to take it's toll on *all* exposed water tiles.

oh wow I just saw it. well it seems like the best option.

On the "river side" you're losing water back into the river.
On the "ocean side" you're losing pressure because the water is "squeezing" through diagonals which removes the pressure.

You've really only got two easy options:  A) channel out those diagonal blocks on the ocean side or B)install floodgates/damn the river to increase pressure.

after fixing this of course. try building drawbridges instead of floodgates... no more building destroyers! 

[Nameless Archon]

Use pumps 

I, uh, don't know how to use pumps. 

Time to learn. When building large constructions involving reservoirs or moats (or, indeed, just about anything with large water/magma displacement) the humble and powerful pump is the way to go. Gravity-feeding a large reservoir can result in a large empty reservoir that's 'half-full' only to a depth of 1/7, because the larger the area you try to fill, the more surface area drops to 1/7 and can evaporate, which is what has happened to your reservoir here - it's spreading out and evaporating.

Use. A. Pump.

Pumps can move volumes of water that border on the absurd, at rates that are astounding to behold.

[Vattic]

One technique for combating evaporation when filling large areas is to divide the area into sections and fill them one at a time. You can do this with bridges linked to levers but make sure the bridges are either one tile wide by any length long or one tile long by any length wide to avoid crushing water with them. I use this technique for spreading magma and use non magma safe materials so that by the end there are no bridges left, unfortunately, the bridges will be permanent with water.

After typing all that out I realise this won't be easily achieved in your situation as the water is already flowing and will stop dwarves from building the bridges, though, I figure someone might find the advice useful anyway.

[Daetrin]

Use pumps 

I, uh, don't know how to use pumps. 

Time to learn. When building large constructions involving reservoirs or moats (or, indeed, just about anything with large water/magma displacement) the humble and powerful pump is the way to go. Gravity-feeding a large reservoir can result in a large empty reservoir that's 'half-full' only to a depth of 1/7, because the larger the area you try to fill, the more surface area drops to 1/7 and can evaporate, which is what has happened to your reservoir here - it's spreading out and evaporating.

Use. A. Pump.

Pumps can move volumes of water that border on the absurd, at rates that are astounding to behold.

This. Use. A. Pump.

(Can we get an image macro?)

And heck, if you screw it up it'll just make the LP more entertaining. One more thing to note is pimps move water up one level.  If the moat is below the level of your pump you'll likely get some overflow before all is said and done.

[Qinetix]

Pumps can be powered , another unknown aspect of this game , power via wind mills and water wheels
So pumps will automaticaly pump water without the need of a pump operator

[Patchy]

Its not just the normal 1/7 evaporation going on. He's in a hot/scorcher biome too. So water on the surface will evaporate no matter what depth it is. And apparently the evaporation rate is extremely fast. I would have thought opening up the ocean to pour in would have been enough, but apparently I underestimated the power of the hot/scorcher biomes evaporation rate. It does make me curious though since it's overpowering an ocean, maybe I can breach an aquifer in one of those biomes by exposing it to the surface... I think it might be time to test that. And even if he does manage to fill it, he'll have to keep the canals/pumps if he figures them out, open/on all the time to keep the moat full.

[Qinetix]

Its not just the normal 1/7 evaporation going on. He's in a hot/scorcher biome too. So water on the surface will evaporate no matter what depth it is. And apparently the evaporation rate is extremely fast. I would have thought opening up the ocean to pour in would have been enough, but apparently I underestimated the power of the hot/scorcher biomes evaporation rate. It does make me curious though since it's overpowering an ocean, maybe I can breach an aquifer in one of those biomes by exposing it to the surface... I think it might be time to test that. And even if he does manage to fill it, he'll have to keep the canals/pumps if he figures them out, open/on all the time to keep the moat full.

If thats so then his moat will not last longer , I got a idea , MAGMA MOAT , Isnt the temperature high enuf anyways? That provides abit of a higher defence

[Jurph]

This. Use. A. Pump.

(Can we get an image macro?)

[Patchy]

Well finished a quick series of tests. 5 different scorching maps and the results show some evaporation but the rate was variable for each one. None of them had near enough evaporation to account for what Mr Kraken is seeing. Though I only used 5x5 pits, he's got a bloody huge moat. I'm thinking if you combine the natural 1/7 evaporation with the hot/scorching biomes nicking units of water off the deeper tiles, you might have what he has. Also because on each map the evaporation rate was different, I'm thinking that his scorching map is hotter than mine were. It took about a season to evaporate a 5x5 room of 7/7 water on 3 of my tests, 1 had no noticeable evaporation at all after a season, and the last one had some. And the 5x5 exposed aquifer rooms had no noticeable effect on them in any map.

Anyways, they were quick and rather informal tests, so take them with a grain of salt. So enjoy.

[Xenos]

Do not use a pump.  Use a bank of pumps.  If you are going to use machinery, overdo it.  I think something like, 5 pumps constantly working to keep that moat filled would be nice.  if not that, then magma (scorching wont evaporate it)

[TolyK]

Do not use a pump.  Use a bank of pumps.  If you are going to use machinery, overdo it.  I think something like, 5 pumps constantly working to keep that moat filled would be nice.  if not that, then magma (scorching wont evaporate it)

Don't forget the walls!
Oh, and my suggestion is (side view):

Code: [Select]

___*____
# %%
$ ####
######
where # is wall, $ is dug out/fortifi-carved out while the pumps are running, %% is a pump, and * is a connection to your power supply (probably combination of wind and waterwheels). Let them run while you breach the ocean to avoid drowning your miner. and keep 'em running so that it keeps filling if evaporation occurs. but not overfilling.