Looks like a Sea around the Mump

Discussion in 'Off-Topic Discussion' started by Phil A, Jan 26, 2014.

  1. ARMANDII

    ARMANDII Low Flying Administrator Staff Member

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    While serving out at Aden, many Moons ago, at RAF Khormaksar and on Guard Duty after working a 14 hour shift repairing aircraft radar I was put in charge of 14 locals. They were tasked with digging a ditch to lay some pipes in. Unfortunately, a lot of the area, which is surrounded on three sides by the Indian Ocean, is below sea level so when they'd got to a certain depth the ditch started to fill up with sea water. I did try to to explain to them when they started to bale the water out that they'd got a lot of water to go but they kept on baling and it kept coming in.:dunno::snork:
     
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    • pete

      pete Growing a bit of this and a bit of that....

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      I'm now thinking, Levels?
      If this place is Level, there is no way in the world it will drain.
      It could be 1000ft above sea level, but if it is all the same height then its like a sump.
       
    • clueless1

      clueless1 member... yep, that's what I am:)

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      Have you been watching the weather reports? The south west is taking the brunt of the weather. Up here, touch wood, if we didn't have TVs and the interweb we'd have no idea that there was any problem. Yes the ground is wet, with some fields showing standing water, but nothing out of the ordinary for this time of year.

      The south west is get battered by the weather, and even if the levels are above sea level, they are lower than most of the rest of the land, and water is kind of influenced quite a lot by gravity.
       
    • ARMANDII

      ARMANDII Low Flying Administrator Staff Member

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      Not quite, Pete, there is energy in the flow of the water in the river channel from the weight of the water and the power of gravity pushing it from the usually higher source.:dunno::coffee:
       
    • clueless1

      clueless1 member... yep, that's what I am:)

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      If the ground was impervious to water, yes. But it isn't. So as long as there is somewhere for the ground water to escape to, even if via the soil, then it will. What seems to be happening in Somerset is rainfall is topping it up faster than it can drain away. If you reduce the resistance to the water on its escape route, then maybe it will drain faster than it is replenished. Don't forget, its not just rainfall on the flooded area that's the problem. It is rainfall on the higher ground surrounding it too, which runs down. If the path of least resistance for all that water was a channel such as a river, then that's which way most of it would go. If such channels are shallow and full of mud, busted bits of tree, and who knows what else, then some of the water will still go that way, but once that becomes overwhelmed, the path of least resistance becomes open ground.
       
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      • Phil A

        Phil A Guest

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        Like most of the Thames basin, the levels have been reclaimed from marsh land since Roman times. If you used the time travelling helicopter then London would have looked very similar to Somerset 2000 years ago.

        Difference is, they gave up on dredging down here in the 1980's whereas London has had new sewers, the Thames Barrier and Boris:biggrin:
         
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        • ARMANDII

          ARMANDII Low Flying Administrator Staff Member

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          Well, river channels were formed by the grinding power of water making the channels deeper and deeper. Some of the rivers that I fish have really high banks from the original level of the land and where the water flow cut through the land. But when you get the exceptional circumstances of these floods with the lack of vital dredging and maintenance that has happened over the years by ill informed and short sighted Governments then the normal rules of Nature get overwhelmed.:coffee:
           
        • Phil A

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          I drove my Chevvy to the Levée but the Levée was wet :snork:
           
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          • ARMANDII

            ARMANDII Low Flying Administrator Staff Member

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            I remember it well!!

            So bye-bye, Miss American Pie
            Drove my Chevy to the levee, but the levee was dry
            And them good old boys were drinkin' whiskey and rye
            Singin' "This'll be the day that I die
            This'll be the day that I die"

            :hapydancsmil::hapfeet:
             
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            • Jack McHammocklashing

              Jack McHammocklashing Sludgemariner

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              Now all this water and effluent from the Somerset levels cess pits drain down through the soil into the water table that we are about to drink ?

              Jack McH
               
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              • pete

                pete Growing a bit of this and a bit of that....

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                Which is the point I'm trying to make, if gravity can t shift it, then no man made pumps will do the job during such a deluge.
                I should point out it aint that dry around here at the moment, and the North does seem to be missing a lot of this rain.

                I'm not sure how many millions it cost to build the Thames barrier, but there is no way any government of what ever colour, could justify spending that kind of money on farm land.
                Sounds bad I know, but its reality.

                You dont actually get any grinding power from a river that is barely flowing due to there being no fall.
                How can you create fall in a river that is very near to sea level, you can dredge as much as you like, but the water level will still remain the same during a flood.
                 
              • Jack McHammocklashing

                Jack McHammocklashing Sludgemariner

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                So you do not drink milk, eat bacon and eggs, bread, meat, cereals, pulses, cheese ???

                Oh that is it FOOD comes from Supermarkets doesn't it

                Jack McH
                 
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                • ARMANDII

                  ARMANDII Low Flying Administrator Staff Member

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                  Actually. you do as water is heavy and a cubic metre of water weighs a tonne so multiply that by however many cubic metres of water are flowing, however slowly, through the river channel then that's a huge energy machine and is constantly cutting into banks etc over time.. Six inches of flowing water can make you fall and it's the power/energy of that flow x weight that is so devastating.
                  We have had cases recently though where the flow of rivers has been stopped by the exceptionally High Spring Tides accentuated by the high winds on the coast and the closeness of the Moon and it's pull on the tides.:dunno: But in this exceptional [?] present situation what we have is the normal energy flow being lost due to the overflow over the banks, the already saturated ground unable to drain what it has already in it's strata, and the mass of water losing it's energy as it spreads in less depth of over a massive area.
                   
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                  • Phil A

                    Phil A Guest

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                  • Phil A

                    Phil A Guest

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                    Is it just me or has this thread come down to Pete not having any sympathy for anyone who doesn't live on a hill?
                     
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