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Mon, 11 Apr 2016 7:20 am BST- Light Rain
5 Day Forecast

Wind 2.0 mph @ 40°
48.0°F/8.89°C Humidity 93% Pressure 29.65 (S)

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The Norfolk Broads Forum / General Chat / Saline barrier _ trend or coincidence
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Posted By Discussion Topic: Saline barrier _ trend or coincidence

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ruby
Jan-04-2022 @ 10:06 PM                           Permalink
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Just noticed HW saline barrier is being closed again, probably for 36 hours.

My memory tells me it has closed far more frequently this winter than either last year or the year before.

Is this more evidence of increasing salt water incursion or is it my faulty memory making two and two add up to five .

Graham

Paladine
Jan-04-2022 @ 11:10 PM                           Permalink
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I can't answer your question, ruby, but it has raised another one in my mind. What criteria are used when the decision to raise the barrier is made?

Are salinity tests carried out or is it simply done when particular tide and weather conditions occur?

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Bernard
Jan-04-2022 @ 11:46 PM                           Permalink
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My understanding is there are sensors along the river, pretty sure one is at Acle that flag up that it may need raising, knowledge of tides etc come in to play as well.

steve
Jan-05-2022 @ 6:39 AM                           Permalink
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Wether this helps or not but down here in the south east the Thames barrier has been raised a few times recently due to spring tides yesterday it was raised again , with it over lapping onto the banks at gravesend and onwards , sure it mentioned it would again today ,

steve and vicky
( not a broads local,so my views ,knowledge doesn't count )

ruby
Jan-05-2022 @ 8:56 AM                           Permalink
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I don't know paladine but this is the message from the EA that comes with the e mail.

Due to the continuing north westerly winds causing tide locking, we are expecting to see increasing salt levels in the River Thurne over the next few days.

Graham


Paladine
Jan-05-2022 @ 10:10 AM                           Permalink
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Thank you for the replies. It rather seems to be a mixture of  meteorology and chemistry - weather prediction followed by water analysis.

Been hit by another boat? Report the incident to the Marine Accident Investigation Branch’s dedicated accident reporting line on 023 8023 2527 which is monitored 24 hours a day.  Help to make the Broads safer.

Dilligaf
Jan-05-2022 @ 11:02 AM                           Permalink
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The following link is a thread from another forum (no not that one) and I think you will see from the photos posted yesterdays tide was particularly high due to the weather conditions.
Wind speed and direction is one of the main causes.
https://forums.ybw.com/index.php?threads/big-tide-at-the-tide-mill.577263/#post-7877948

Dave.
Formerly 'LeoMagill'

expilot
Jan-05-2022 @ 1:01 PM                           Permalink
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And today's tide here at Potter is even higher than yesterday's with another three hours yet to flood. The Thurne is overtopping the flood defences in the usual places and, doubtless, the IDB pumps will be pumping it from the marshes back into the flooding river!

"There are old pilots.  There
are bold pilots............."

Paladine
Jan-05-2022 @ 1:12 PM                           Permalink
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The output of some of these pumps can be quite ferocious. Perhaps the outfall pipes could be fitted with mini hydro-electric thingies, to offset the cost of the electricity they use.


Been hit by another boat? Report the incident to the Marine Accident Investigation Branch’s dedicated accident reporting line on 023 8023 2527 which is monitored 24 hours a day.  Help to make the Broads safer.

Hylander
Jan-05-2022 @ 2:53 PM                           Permalink
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Dilligaf ,   where is The Mill pictured please?   Not sure I can place it.

Women dont nag they just
point
things out...



M

Dilligaf
Jan-05-2022 @ 5:11 PM                           Permalink
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It's tidemill at woodbridge on the Deben, at normal low water it's mostly a sea of mud there with a trickle down the middle, the marina behind the mill has a cill to keep enough water in so boats can stay floating.

Dave.
Formerly 'LeoMagill'

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