Chess Pwn |
Hi, I'm curious if anyone has any ideas how to make a city in the desert have more water? There is also a source of salt water nearby.
I know about create water and Grove of Respite. But that water has a duration that is too limiting. I'm wanting something where the water will be able to be stored for a long time. So are there ways to make it rain? or convert the salt water into fresh water? Or something else?
VampByDay |
0th level cleric spell purify food and water.
This spell makes spoiled, rotten, diseased, poisonous, or otherwise contaminated food and water pure and suitable for eating and drinking. This spell does not prevent subsequent natural decay or spoilage. Unholy water and similar food and drink of significance is spoiled by purify food and drink, but the spell has no effect on creatures of any type nor upon magic potions. Water weighs about 8 pounds per gallon. One cubic foot of water contains roughly 8 gallons and weighs about 60 pounds.
(emphasis mine).
So bet a couple clerics/oracles to act as a desalination plant and you are good to go.
In another option, in one campaign, I allowed the players to create a 'lesser decanter of endless water' which cost less money to make but only had the small 'trickle' option. Then they just turned it on and hung it over the town cistern.
LazarX |
1 person marked this as a favorite. |
Hi, I'm curious if anyone has any ideas how to make a city in the desert have more water? There is also a source of salt water nearby.
I know about create water and Grove of Respite. But that water has a duration that is too limiting. I'm wanting something where the water will be able to be stored for a long time. So are there ways to make it rain? or convert the salt water into fresh water? Or something else?
There ARE reasons why desert cities are only found around natural (oaisises?) Put your city around a source of water, such as a natural desert well, or even a magical ice lick if you like. If it was good enough for Avatar, it should serve you well.
The key to good world design is not to beat yourself over the head. Decide on what you want FIRST, and worry about the rules later, ONLY IF YOU MUST. In the real world, nature is full of things that man can not hope to duplicate. Why should the world of magic be any different?
Kayerloth |
No need for magic.
There are a large variety of desalinization processes that could be used. I'm no expert (or engineer) but one of the simplest methods is likely via solar 'power'. Basically evaporate the water off (from your salt water supply - something the sun does naturally), then condense and collect the water. The hard part according to the Wikipedia article I read is probably getting the solar energy concentrated on a small area to cause the natural process to speed up sufficiently for any large scale use.
Short read: Look into Desalinization on the Web.
LazarX |
No need for magic.
There are a large variety of desalinization processes that could be used. I'm no expert (or engineer) but one of the simplest methods is likely via solar 'power'. Basically evaporate the water off (from your salt water supply - something the sun does naturally), then condense and collect the water. The hard part according to the Wikipedia article I read is probably getting the solar energy concentrated on a small area to cause the natural process to speed up sufficiently for any large scale use.
Short read: Look into Desalinization on the Web.
You'll notice that there aren't any record of any pre tech societies who've managed that. the major problem is that while desalination sounds nice, it's extremely engineering intensive to get it to scale beyond beaker stage.
Kayerloth |
Kayerloth wrote:You'll notice that there aren't any record of any pre tech societies who've managed that. the major problem is that while desalination sounds nice, it's extremely engineering intensive to get it to scale beyond beaker stage.No need for magic.
There are a large variety of desalinization processes that could be used. I'm no expert (or engineer) but one of the simplest methods is likely via solar 'power'. Basically evaporate the water off (from your salt water supply - something the sun does naturally), then condense and collect the water. The hard part according to the Wikipedia article I read is probably getting the solar energy concentrated on a small area to cause the natural process to speed up sufficiently for any large scale use.
Short read: Look into Desalinization on the Web.
Good point, though the knowledge is also probably lacking in those pre-tech societies and probably also be lacking in most imagined medieval fantasy settings so there is that as well.
Maybe instead a Permanent Wall of Fire (heat source) plus tubing and make a distillery.
Or just go back and use teams of 'create water' or 'create food and water'. Water from the later appears permanent (doesn't vanish after 24 hours).
tsuruki |
1 person marked this as a favorite. |
A government sanctioned alchemy workshop.
The alchemists get to work within the society with perks, instead they use a huge distilling tank to purify seawater constantly via a combination of magic and science.
Plot hook: The distillery gets sabotaged/poisoned and the PC's find themselves on the problem solving/causing side.
.
A magic fountain run by a water Weird. An obscured grove of nature atop a hill (Olympus style) where water sprouts, a river connecting this grove to a nearby sea is the lifeblood of nearby locales. The Weird may be aware or unaware of the life it provides for the people or perhaps it is working directly with some local druid or city official.
Plot hook: Something happens to the Weird, has it been killed or kidnapped, did it simply just wander off?
.
A huge magic statue of some forgotten king spews an endless stream of clean water, providing for a large society. Many speculate as to the identity of the life giving king from ages past, half followed clues lie everywhere waiting for someone determined enough to tie the ends together.
Plot hook: The grave of the unknown king is unwittingly disturbed in a large scale grave-robbing incident. Hundreds of graves have been disturbed. The PC's must piece together the clues and match them to the right grave to find the right king, and then they must appease the spirit to get the water flowing again.
.
The locals dig deep wells to connect to hidden water veins underground. To provide for an every growing society they must venture further out into uninhabited area to gain access to more water veins.
Plot hook: Eventually some abhuman society figures out that the human society is by far the easiest source of water in the area, but cannot make sense of the technique used to gather it. The abhumans begin to raid human settlements with growing ferocity as their own society grows ever numerous.
.
A diverse multi-god church full of talented clerics of varied gods provides water for the entire society. The priests take turns to fill a huge underground basin with water which they then distribute to officials and locals as needed.
Plot hook: A jealous priest secretly intends to displace the others and usurp the church for his own faith. He reverse-engineers the water conjuring spells unique to the church and sabotages the water depository.
Azothath |
Hi, I'm curious if anyone has any ideas how to make a city in the desert have more water? There is also a source of salt water nearby.
I know about create water and Grove of Respite. But that water has a duration that is too limiting. I'm wanting something where the water will be able to be stored for a long time. So are there ways to make it rain? or convert the salt water into fresh water? Or something else?
well- in a low technology society you can;
dig a well.find a source of water and build an channel, aqueduct, or underground tunnel.
Typically you can find water near mountains or a flood plain.
The problem with (early) desalination by distillation is the massive amount of energy required to boil the water. You then cool the steam to create pure water.
Modern technology uses high pressure and special filtering (reverse osmosis) which is more energy efficient than distillation.
You can also freeze the water and produce ice which has very little salt in it.
magically in DnD... there are several methods.
Since you want water with a permanent duration, you are talking about create water or "gating" in water.
As mentioned the Decanter of Endless Water is effective and practical.
One could create a large cistern or holding tank and create a Gate to the elemental plane of water (20ft diameter hole), then allow water to flow into your tank for 17+ rounds (as it's a 9th level spell).
Control Weather (7th) can make it rain for 4d12 hours.
LazarX |
It's the Third largest city, a very big port town.
Then you're not in a desert but on a shoreline. One area where magic can be of help is snagging icebergs and towing them to town. It's a lot more involved than casting a spell, but it can be made to work.
Chess Pwn |
But the GM described it saying it was a desert, and there is a desert wasteland from the coast for miles. I did mention that salt water was available. Going and getting icebergs will probably be to long/expensive. I'm wanting something that doesn't cost very much as to make a profit from selling water. Hiring people will probably cost more than they make.
BigNorseWolf |
Keep in mind that you don't just need water to drink, you need water mostly to grow food: and a LOT of it. I had a brief stint in africa, and comparing the amount of water even a small villiage needed for agriculture vs what a low level cleric can get with create water had the cleric orders of magnitude from where they needed to be.
Tiny Coffee Golem |
You could make a giant mundane water purifier. In simplest form they're easy to do. IRL they're not terribly efficient, but in a magical world with just a little magic help they could be something useful for a large population.
Basically this, though you'll want to make it really big or multiple. Perhaps even create it using permanent walls of force. Regardless, it's a simple low-tech low/no-magic way to desalinate water.
Claxon |
Depending on what levels of magic you have access to...an easy way to work this is decanters of endless water. Or you can open a portal to elemental plane of fire, harvesting the energy to boil salt water and collecting it again where it is pure and clean. Technically, purify Food and Drink (O-level) should remove salt from the water and make it potable, though you would probably need something else to support agriculture.
LeesusFreak |
I mean, its D&D, magic is how you're gonna power your water purifier. In this case, a Solar Still is very, very doable. If you want to rapidly evaporate the water, you can either devote a large open space to your still (shouldn't be hard on the outskirts of a desert town. Hell, the population would follow the water, once it was established. Even a large settlement will have people relocating to your prime real estate with easy water access), or use a boiler. You can RAW enchant a sword with the Flaming property or buy a Blazing Robe-- permanent fire that doesn't require fuel is already a thing. And if it wasn't, a few druids can still create lots of biomass for burning with Plant Growth.
Claxon |
So what spell allows my to open a portal to a different plane?
Yeah, that part is kind of made of handwavium. It is possible to open a gate, but no way of making it permanent beyond the DM allowing it.
You could get close by creating a Greater Demiplane and making a portal go to the plane of fire, which is permanent. But the annoying restriction is that you are only allowed 1 portal per demiplane, so you cannot have it go from material plane to demiplane to elemental plane of fire. If you GM is willing to make an exception (and this sounds like a home game) you should be able to make a permanent demiplane with a gate to the EPoF and a gate to the material plane and then place all you distillation equipment in the demiplane.
Edit: Place all the hot part of your distillation equipment in the demiplane, obviously the cooling tower and liquid recovery portions of the equipment shouldn't be in a hot place.
Claxon |
Claxon wrote:Chess Pwn wrote:So what spell allows my to open a portal to a different plane?Yeah, that part is kind of made of handwavium.That sounds unnecessarily difficult. A simulacrum of a fire elemental would do everything you wanted, permanently, for a lot less effort, time, and money.
I mean, that could be a way to go about it, though I prefer an actual bound elemental personally. And even then I think the demiplane to the elemental plane of fire is still way more cool. But that's just me. Plus, we don't know how much heat a fire elemental generates, but I would estimate that the plane of fire generates significantly more. Even if you just have a small hole tapped into it.*
I just think the demiplane idea is more cool....or in this case hot.
*Conjecture
Orfamay Quest |
Orfamay Quest wrote:I mean, that could be a way to go about it, though I prefer an actual bound elemental personally.Claxon wrote:Chess Pwn wrote:So what spell allows my to open a portal to a different plane?Yeah, that part is kind of made of handwavium.That sounds unnecessarily difficult. A simulacrum of a fire elemental would do everything you wanted, permanently, for a lot less effort, time, and money.
Time-limited. Planar binding lasts only one day per level. Simulacra are forever.
Claxon |
Claxon wrote:Orfamay Quest wrote:I mean, that could be a way to go about it, though I prefer an actual bound elemental personally.Claxon wrote:Chess Pwn wrote:So what spell allows my to open a portal to a different plane?Yeah, that part is kind of made of handwavium.That sounds unnecessarily difficult. A simulacrum of a fire elemental would do everything you wanted, permanently, for a lot less effort, time, and money.
Time-limited. Planar binding lasts only one day per level. Simulacra are forever.
I really hate the spell Simulacrum
Claxon |
Claxon wrote:I really hate the spell SimulacrumIt is really easy to cheese, but I think this use is reasonable enough.
I agree that this specific usage would be alright.
As far as why not open a portal to the plane of water...that's a fair point. Except it doesn't use fire which is awesome.
Also, I have no idea if the water from the elemental plane of water is potable or not. I feel like it might be patches of salt and fresh water, I really have no idea. If the water isn't potable then they're back at square one since they have an ocean adjacent. Access to water isn't necessarily a problem, is making the water drinkable.
Tiny Coffee Golem |
Tiny Coffee Golem wrote:Claxon wrote:I really hate the spell SimulacrumIt is really easy to cheese, but I think this use is reasonable enough.I agree that this specific usage would be alright.
As far as why not open a portal to the plane of water...that's a fair point. Except it doesn't use fire which is awesome.
Also, I have no idea if the water from the elemental plane of water is potable or not. I feel like it might be patches of salt and fresh water, I really have no idea. If the water isn't potable then they're back at square one since they have an ocean adjacent. Access to water isn't necessarily a problem, is making the water drinkable.
I imagine anyone who can cast gate knows where the freshwater part of the elemental plane is.
jocundthejolly |
No need for magic.
There are a large variety of desalinization processes that could be used. I'm no expert (or engineer) but one of the simplest methods is likely via solar 'power'. Basically evaporate the water off (from your salt water supply - something the sun does naturally), then condense and collect the water. The hard part according to the Wikipedia article I read is probably getting the solar energy concentrated on a small area to cause the natural process to speed up sufficiently for any large scale use.
Short read: Look into Desalinization on the Web.
I was thinking solar still (pot in hole in sun, plastic wrap over hole, water on plastic wrap, water into pot) but that probably wouldn't work in the desert.
Tiny Coffee Golem |
Tiny Coffee Golem wrote:I think the problem is that it isn't static. The whole thing ebbs and flows, meaning the areas of fresh and salt water move around, though I'm not sure.I imagine anyone who can cast gate knows where the freshwater part of the elemental plane is.
Possibly, but at this level of minutia it's up to the DM. I don't think the elemental plane is statted out to that degree in Pathfinder.
"the purest water from the elemental plane" is a fairly common trope. I'd imagine you can find a spot that's more or less static as far as water quality.
Though the bigger concern would be for things to come out with the water.
Perhaps just get the decanter and be done with it.
Orfamay Quest |
Why is the decanter of endless water not good enough? Its cheap at 9,000gp, and gives you up to 30 gallons a round of fresh water. Plenty enough to put into a holding tank and sell waterskins of it all day long.
Any amount of water you can put into a waterskin is not enough to shift the needle in a farming community, esp. one in the desert. Typical irrigation farming takes 4000 gallons per acre per day.
Doing the math, a decanter can produce 300 gallons per minute, or 18000 gallons per hour, so one decanter could irrigate roughly 100 acres, which is a small village, not even a square mile of land. At a one-person-per-acre standard (not bad for sandy soil -- actually, that's pretty good even for really good soil), that's 100 people, each of which would be expected to chip in 90 gp for their share of the decanter, about three years wages for a typical farm laborer.
Tarantula |
Tarantula wrote:Why is the decanter of endless water not good enough? Its cheap at 9,000gp, and gives you up to 30 gallons a round of fresh water. Plenty enough to put into a holding tank and sell waterskins of it all day long.Any amount of water you can put into a waterskin is not enough to shift the needle in a farming community, esp. one in the desert. Typical irrigation farming takes 4000 gallons per acre per day.
Doing the math, a decanter can produce 300 gallons per minute, or 18000 gallons per hour, so one decanter could irrigate roughly 100 acres, which is a small village, not even a square mile of land. At a one-person-per-acre standard (not bad for sandy soil -- actually, that's pretty good even for really good soil), that's 100 people, each of which would be expected to chip in 90 gp for their share of the decanter, about three years wages for a typical farm laborer.
He said he is looking to sell water to people. I assumed we were talking on the "waterskins" level and not "merchants of the desert farmers" level. If you are looking for that level of sales, just buy one decanter, sell that to a farmer, buy 5 more decanters, sell that water to other famers, and so on. Its not like 9,000gp is super expensive.
boring7 |
For geography, think Dubai, it's on the coast but super-hot desert.
Funnily enough I've been recently imagining (semi-ludicous) terraforming efforts in that part of the world. The UAE uses 53,504 million imperial gallons (with a population of ~9.5 million. That's a lotta water. But first let's talk magic:
-Decanter of Endless Water; with no limit and a low (relatively) price you can dig out a cistern, cover it with stone (use Wall of stone and stone shape) and have a supply, turned on full blast it will give you *does the math* ~158 million gallons of water a year...huh.
Well the UAE has a much larger population than your single desert trade metropolis, Assuming a metropolis it's probably 30 thousand people in the city and another 15 thousand close enough to be a part of the market share, you're good.
-Gate: You can't make a permanent gate directly to the Elemental Plane of water, but you can make a permanent demiplane that does. Not only that, the demiplane can produce its OWN water, presumably, though the Dm has plenty of license to mess with that.
-Magic Desalination: This was covered above.
But finally, the solution I was thinking that requires no direct magic is this: With the help of a burrowing creature (say a trained or mind-controlled Bulette or Purple Worm, or shapeshifting) you dig a tunnel from a few miles back to the ocean. The tunneling process will be a hassle, since there aren't many rules for it, but you should be able to work something out with Walls of Stone or transmute mud to rock. Once you have your big pipeline to the ocean (hope you brought Air Bubble spells) you tap it to fill multiple underground silos. Each silo is lined with black rock and capped with a large lens-shaped dome that directs the maximum amount of sunlight down into the water and the black rock.
Light becomes heat, heat vaporizes water, water vapor is either collected and channeled into the cistern or vented into the atmosphere to increase average humidity (and therefore increase average rainfall, decrease average temperature, and make the place nicer to live).
You'll be building/digging a lot of those water silos, and you'll need squads of dudes to go in at night and scrape away the salt build-up on the walls, but salt is still a trade good too, so it should mitigate the cost if not pay for itself. Best of all since none of it requires continuous magic you can leave it in the hands of no-class-level-having experts and commoners and it will keep working when you wandered off to have extra-planar adventures.
Or maybe not, this design is entirely theoretical from my ignorant imagination.
Also, this plan doesn't require level 7+ spells.
LazarX |
Would this feasibly work? Debatable.
Woud it look cool? Yes and that's good enough.
Remember how much the average Star Trek episode just BSes it's way though hoping the audience is basically ignorant of the physics they're faking? Fantasy RPG's aren't any different when it comes to setting details and plot devices.
LazarX |
But the GM described it saying it was a desert, and there is a desert wasteland from the coast for miles. I did mention that salt water was available. Going and getting icebergs will probably be to long/expensive. I'm wanting something that doesn't cost very much as to make a profit from selling water. Hiring people will probably cost more than they make.
Making a profit from selling water pretty much depends that a plentiful supply be available in the first place.
For a desert town this usually means that the town has to be centered on an oasis from which access is controlled very severely.
If you're going to eliminate exotic and most magical means, you really don't have any alternative.
LazarX |
I'm not eliminating exotic or magical means, I just don't want to have to spend a month or more porting icebergs. So unless I can teleport them safely it wont help much. I have access to lv7 wizard spells and lv5 cleric spells.
If the city is already there than it already HAS to have water. So break your way into the water supply Robert Heinlein style and start hawking that... and don't get caught.
boring7 |
Somehow, buying a 9,000gp decanter seems a lot easier than mind controlling a purple worm to dig tunnels, then grinding out some giant lenses and hiring people to regularly clean out the tunnels.
Oh it's absolutely easier.
At the very least it is easier on the front end and maybe harder on the back end.
If you operate on the assumption that magic is untrustworthy/unreliable (Mystra dies a lot and long-running artifacts get stolen/demon-corrupted) the city might want less magic in their solution. Perhaps I am being paranoid. This is another reason Gates are suboptimal, too. There's a certain formerly-flying city in a Golarion Jungle (Mwangi expanse?) that used to use the elemental plane of water as it's cistern, there is now a colony of Marids ruling that section of the ruin.
I also tend to assume you will be selling the water source to the state, unless you plan on being the king yourself, he'll want it to secure his own power. And who wants to be tied down like that? Murderhobo 4 lyfe.
Also, theoretically only the silos would really need to be cleaned out. The underwater tunnel itself would be like an underground river. But like I said it's just a (pun incoming!) pipe dream of terraforming technology I've been toying with.
Tarantula |
Well, create demiplane lesser filled with water. Bring bags of holding in with you. You and up to 7 more people can come in. So thats 8 bags of holding if you each only bring one. Eject everyone when you're done. Each type 4 bag of holding is 1870 gallons. But they also cost 10,000gp. Instead, you could buy a decanter of endless water for 9,000gp and have 432,000 gallons a day.
boring7 |
They ship their water in from the sounds of it. They needed a port for this ocean and it surrounded by desert and there's not a potable water source around. So they port all their water in. That's why selling it is profitable.
There is no possible way that would be sustainable, people drink to much waterYeah, even if they have wells, a river, or a pipeline water would be rationed and expensive. California has severe drought problems often and they aren't the Arabian Peninsula. Like salt or food, you're looking to out-supply current dealers and undercut their prices, or simply expand the market (more water means more potential irrigation).
And yeah, Decanter of Endless Water filling up an underground cistern you dug (you want a cistern, it gives you wiggle-room) is your simple answer, deal-bound Water elemental is a more interesting answer, and in either case it's a potential plot hook if it gets stolen or broken. Then you have 150 days to get a new water chipa limited amount of time to find the stolen decanter/elemental bowl and save the city.
Claxon |
Then you have150 days to get a new water chip
I like this reference
Why is the decanter of endless water not good enough? Its cheap at 9,000gp, and gives you up to 30 gallons a round of fresh water. Plenty enough to put into a holding tank and sell waterskins of it all day long.
I thought the goal was to supply a sustainable community on its own, not to just profiteer off of water. Honestly, trying to break into whomever else's profit seems like it would be met with attempted assassinations, etc.
Chess Pwn |
The goal is to profiteer off of water. We've already gone through the city to have a permit to sell. Currently it's just limited temporary water, but if we could get larger permanent volumes of water then we can sell more and at a higher price. But this is a side-story to our main plot, so that's why I can't really use any option that takes a lot of time.