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Thread: Water treatment (for screenplay)

  1. #1

    Water treatment (for screenplay)

    I am not in the urban planning field but this group is just the type I need to answer my question.

    If a city was to be built in a crater near a river what would be the best method of bringing water to that city?

    Thanks in advance...

  2. #2
    NIMBY asshatterer Plus Richmond Jake's avatar
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    WAG....a pipe?

  3. #3

    ...

    by WAG do you mean the watershed advisory group? I understand a pipe but would there be any additional challenges that would have to be addressed? I suppose it would be similar to a community in a valley.

    Would the pipe be above ground and lead down the crater wall or would the pipe hole be bore through the rock to the river?

    Excuse my ignorance, as you can tell this is a hypothetical inquiry in regards to something I know nothing about.

  4. #4
    It makes no difference in where a city is located. Water from a source is sent to a treatment plant if necessary, then it is distributed via pipes to buildings. If gravity can help, then it is used. But there needs to be sufficient water pressure so most places use pumps.

  5. #5
    Cyburbian Plus Zoning Goddess's avatar
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    I think you just sit in your crater/bowl and wait for the water to flow in? Or would that be against floodplain rules?

  6. #6
    NIMBY asshatterer Plus Richmond Jake's avatar
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    Quote Originally posted by clonedbeef View post
    by WAG do you mean the watershed advisory group? .....
    Nope. WAG = Wild Ass Guess.

    California has re-plumbed the state with a series of canals but....how else would you convey water to an end-user without pumps and pipes?

    To the OP: is this a gag post? I'm treating it as such.

  7. #7

    ...

    It's for a screenplay, I want to make sure my descriptions are accurate to something that could exist.

    The ground was originally going to be too hard to dig but then having pipes all above ground would be just ridiculous, not to mention issues with waste material.

    unless there is a modern city someone knows about that has above ground piping for such things.

  8. #8
    NIMBY asshatterer Plus Richmond Jake's avatar
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    A Screenplay?

    Do you writers have a forum that I could access? I have several questions I want to ask about pron actresses.

    ___________________


    Now that I give your question some more consideration, I think the most important question is: How are you getting the poopie water out of the crater? Does your screenplay contemplate lift-stations or a vacuum suction system? You should consult a civil engineer.
    Last edited by Richmond Jake; 15 Jan 2009 at 8:56 PM. Reason: given my bowels, sewage disposal is so important to me

  9. #9

    ...

    I'm not sure if the first part of your reply was supposed to be condescending but I think my presence on here is harmless enough. I'm not writing a porno but I am sure there are many places to find out about porn stars, they are "accessible" enough

    I'm many drafts into the screenplay and I have mostly neglected the real world applications of much of this until I had the story right. A civil engineer sounds like a good idea for consultation, good call on the lift station and vacuum suction system.

  10. #10
    Cyburbian Plus Zoning Goddess's avatar
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    Quote Originally posted by clonedbeef View post
    It's for a screenplay,
    You should actually tell us if you have an ulterior motive. We might help instead of laughing our asses off.

  11. #11
    Cyburbian Streck's avatar
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    A water "treatment" plant (for sewage) is usually downstream to minimize pumping to get the sewage there.

    It may then be discharged (again out and downstream) or "treated" for reuse as potable water. In that case, after treatment, it is pumped to a higher elevation and stored in elevated water tanks so that gravity is the force that provides water to the end user. It is stored in the elevated water tanks so that pumps do not have to operate full time to provide the pressure in the water lines. Gravity provides constant free pressure.

    I would think that eventually your city in the crater would be flooded by ordinary rains. (But you say there is a river running through it.) If the water has nowhere to go, it would eventually fill up the crater - or the ground just lets the water percolate into the soil. In this case you would probably have no streams or lakes, except in times of periodic downpours as in Arizona.

    Of course, the crater could have filled with natural rain water some eons ago and eventually overtopped the rim, or built up enough pressure before it reached the rim to breech the walls and eventually find its way downstream. (The ultimate "downstream elevation" is sea level. I am pretty sure your crater would be above sea level.) This way your town could still be "in a crater" and have a naturally flowing stream/river/lake situation within the crater - if large enough.

    If the crater is still actively accumulating rain water, you have another active plot line - pending the ultimate breech and downstream flooding and scouring.

    Good luck in your screenplay.

  12. #12
    Cyburbian Cardinal's avatar
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    The first question I would ask is what the elevations are for both the river and for the city in the crater. This may answer your question of whether pumping is necessary. In many places, I would think that pumping the water to the rim of the crater would be an advantage, as you would likely be creating the pressure necessary to serve the city by having water storage above it. The other variable is the material comprising the crater wall. What is the cost (and distance) of boring through the wall versus bringing pipes over the surface. The surface route may be much less expensive.
    Anyone want to adopt a dog?

  13. #13
    Cyburbian otterpop's avatar
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    As an aspiring writer and a professional planner, what comes to mind for me is why a city is built in a crater? Communities are typically built where resources are easily available. How many cities have you seen in a crater? Getting in and out, geologic instablity and provision of water and wastewater make it impracticable, other than it just seeming like a neat place to live for a story. A city in a crater would also be hard to defend (if you are talking some sort of apocalyptic scenerio).

    If someone did build a community inside a crater, then groundwater would be the most practical source of water, though volcanic rock is leaky. A meteor crater would not have that limitation. Groundwater would be cleaner than surface water, barring man-made pollution. If groundwater is not a possible source, then a pipe drilled through the crater wall. Depending on the grade between the crater floor and the river, water would either have to flow by gravity or utilize a lift station to create gravity flow. Regardless, as someone already mentioned, the water would have to be treated at or near the river before it could be piped to the town.

    Another question to resolve is what happens to the wastewater? Flushing it down the volcanic vents or what?

    Just spitballing here.
    "I am very good at reading women, but I get into trouble for using the Braille method."

    ~ Otterpop ~

  14. #14

    ...

    I need to mull this over a bit and come back with some competent answers to your questions so I can follow up on this properly.

    Thanks so far!

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