Puzzle, where does beach sand come from?

Discussion in 'Off-Topic Discussion' started by clueless1, Apr 5, 2012.

  1. clueless1

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

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    Ok, it sounds like a daft question, and probably is really. Where does beach sand come from? Obviously it's just bedrock that's been pulverised by tides and currents for millenia.

    But, here's the bit that puzzles me. Here in Redcar, we are in a wide bay (about 7 miles of beach in all). North easterly winds are not unusual, and when the wind gets up, sand is carried from the beach onto the roads, into people's gardens, everywhere. In a day, hundreds of tonnes of the stuff can end up in great drifts on the roads, and that's not to mention the amount that just disperses over everything.

    Then I got to thinking, as nobody actually puts it back (which would be a pretty impossible and futile task), how come it never runs out?

    Before you all think I've finally cracked completely, there is logic behind my questioning. See, we have an expanse of dunes along our bit of the coast. The dunes are made of nothing more than drifted beach sand, yet they are now covered in lovely grass and so many different wildflowers it's more diverse than anything we could make, so I've toyed with the idea of pinching a few bags of sand from an as yet uncolonised patch of dunes but then I thought if I do that, then would I be upsetting some delicate balance? That's when I thought, there is no way I can carry in a year even a fraction of what goes onto the roads in one day of gales. So that got me to thinking, how exactly does it get replenished indefinitely at a rate roughly equal to the loss through drift?
     
  2. Freddy

    Freddy Miserable git, well known for it

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    I reckon there's a philosophical answer to this... :old:
     
  3. ARMANDII

    ARMANDII Low Flying Administrator Staff Member

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    I was up your way, Clueless, last weekend, at Stockton-on-Tees, but didn't get time to visit Redcar as I did last time. You're right about the beaches and dunes there, they are fantastic.

    I think you're right about not taking the sand from the Dunes as there is a natural process of change going on there, and it won't take long for them to get colonised by plants and insects.

    The Sea is supplying the sand as it does every where. The sea will transport sand around the coasts changing the nature of beaches as it does so in a never ending process. Storms, and heavy weather will drive the Sea to do it in a more brutal way moving thousands of tons of sand in a day or night, while the normal currents will do it more gently but relentlessly. The loss and replacement might seem to be in balance but it's not really. It sways one way or the other and if it goes too far either way the beach will change. Your beach is a big beach and it will take a lot of weather and high seas to change it but that's what put it there in the first place.:snork:
     
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    • HarryS

      HarryS Eternally Optimistic Gardener

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      1st law of life..........everything has to be somewhere. So beaches thought the seaside is a great place to be :doggieshmooze:
       
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      • gcc3663

        gcc3663 Knackered Grandad trying to keep up with a 4yr old

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        Take a Wheelbarrow, Broom and Shovel to Redcar Beach Roads after a storm and clean the streets. Ola a barrowload of sand - not nicked from the beach, and a bit of Civic Pride re-installed.
        Clueless, you'll be a local hero - and have the sand you need.
         
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        • lazydog

          lazydog Know nothing but willing to learn

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          Anyone remember them test tubes with the different coloured sand in with a cork at the bottom!
          [​IMG]
           
        • JWK

          JWK Gardener Staff Member

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          It's from Alum bay on the Isle of Wight

          [​IMG]
           
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          • HarryS

            HarryS Eternally Optimistic Gardener

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            You beat me to the coloured sand answer John :blue thumb: I have been to Alum bay , it is an incredible place. There is also a little wireless shack there used by Marconi for his wireless experiments in the late 1800's . He used a 300 foot ariel and just managed to contact Bournemouth ! We have come a hell of a long way in just over 100 years .
             
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            • shiney

              shiney President, Grumpy Old Men's Club Staff Member

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              When I was a lad :old: - we used to climb the cliffs at Alum Bay and collect our sand. I think you're not allowed to do that nowadays - 'Elf and Safety!
               
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              • HarryS

                HarryS Eternally Optimistic Gardener

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                Did you actually meet Marconi while you were there shiney ?:snork:
                 
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                • shiney

                  shiney President, Grumpy Old Men's Club Staff Member

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                  No, but I had some spaghetti :heehee:
                   
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                  • JWK

                    JWK Gardener Staff Member

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                    Yes it's a great place for a day out for kids. We took ours there a few times and until recently I was unaware of the 'secret' rocket launching site on the needles battery above Alum Bay. In fact I thought it was an April Fools joke when I first read about it:
                    http://www.theneedlesbattery.org.uk/rocket.php
                    We went to visit it a couple of years ago, a quite amazing place with all the underground tunnels as well.
                     
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                    • Phil A

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                      Sand gets washed along the coast by a process known as Longshore drift. Not sure what direction it goes up your way Dave but on the South Coast its from West to East.

                      If they put up an unnatural barrier then it builds up on the West side & gets eroded from the East.

                      I've got a pic of West Bay in Victorian times not long after the 2 Harbour arms were built & there was a lot of beach on the East side.

                      Just before they re built it about 10 years ago, the beach had gone to the extent that you could fish off the East side. They've now replaced the sand with thousands of tonnes of imported sand, but even that is starting to receed already.

                      They put the wrong shingle on the West side, so when you visit the "Jurassic" coast, you are sitting on red Devonian shingle:doh:
                       
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                      • clueless1

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

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                        I'm still pondering it.

                        Lets say I want a total of 250kg of sand.

                        On one hand, if I liberate it from our local beach just between the tide line and the foot of the dunes, it is as local as it gets. About 1 mile from source to destination. No quarrying, no great wagons, no JCBs, no hundreds (or thousands) of miles on the road.

                        On the other hand, I'm not clever enough to understand the potential impact of taking from a natural process, plus if I did it and everyone else did it, then it wouldn't be long before a very visible and long term difference was made. In any case sand is cheap enough to buy and have delivered (about £40 per tonne I think) so that's the much easier option, as opposed to bagging it up, then manually hauling several hundred yards from beach to car.

                        I've decided I'm not going to pinch it from the beach, because like I say its easier to just order it in and let someone else figure out how to get it to my house, but pushing law, cost, and effort to one side, I wonder which would be the most eco-friendly option.
                         
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                        • Jack McHammocklashing

                          Jack McHammocklashing Sludgemariner

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                          Buying it in would ultimately be the eco friendly option
                          You as but one, will make no difference using the delivery that hundreds have already used, so one more delivery emission is like a gnat on an Elephants back

                          IF you went and pinched the sand,it would make a minute - difference to the beach and would make one minute + difference to delivery as you would also have to transport it home (using a car not a wheel barrow)
                          Though if you had to use your car more often to earn the monies to pay for the sand and delivery then it would be more eco friendly to pinch it

                          You need to pinch it then

                          Jack McH
                           
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