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Thread: Watchet web cam

  1. #11
    Join Date
    Aug 2010
    Location
    Bristol Channel
    Posts
    777

    Default Re: Watchet web cam

    Quote Originally Posted by pondfish View Post
    I would have thought the faster the water leaves the marina more mud would go out.
    Indeed but the current arrangement needs to augmented by a lifting sluice so more of outflow between top of tide and level when gate is needed, is from the bottom where the mud is. A bit like a version of the Underfall in Bristol Docks but less efficient as no lock gates. Alternatively just pipe the river back where is belongs.
    A boat is for going places

  2. #12
    Join Date
    Aug 2016
    Location
    Bristol
    Posts
    269

    Default Re: Watchet web cam

    Have they now turned the webcam inwards?

    Can't find a link to the marina one anymore .
    YouTube: Gorjus Boating
    Boat: Sealine 195

  3. #13
    Join Date
    Oct 2013
    Location
    Shropshire - Sundance, Bristol Channel
    Posts
    1,028

    Default Re: Watchet web cam

    http://www.visit-watchet.co.uk/index.php

    It does pan and stop in places though so give it time if it's pointing the other way.
    Tom, Sundance
    2wheels1keel.com

  4. #14
    Join Date
    Aug 2016
    Location
    Bristol
    Posts
    269

    Default Re: Watchet web cam

    Quote Originally Posted by Yellow Ballad View Post
    http://www.visit-watchet.co.uk/index.php

    It does pan and stop in places though so give it time if it's pointing the other way.
    Ah yes, thank you... it panned as I loaded it up .

    Yep... mud still there.
    YouTube: Gorjus Boating
    Boat: Sealine 195

  5. #15
    Join Date
    Jun 2001
    Location
    uk
    Posts
    2,318

    Default Re: Watchet web cam

    It looks as if the yacht harbor is full of mud to the sill depth. Any afloat berths any more?
    David

  6. #16
    Join Date
    Nov 2011
    Location
    Boat in Milford Haven
    Posts
    2,225

    Default Re: Watchet web cam

    Quote Originally Posted by pondfish View Post
    I would have thought the faster the water leaves the marina more mud would go out.
    No, it does not work like that. Mud when settled is hard to erode (because clay clings together electrically). A fast outflow would not touch most of the mud flat that is the marina berthing area, but might scour a relatively deep and narrow trench in front of the gate.

    The answer as often stated is:

    1. To coffer dam the marina and dig out all the mud to bedrock

    2. To ensure that when the gate is closed the water remains sufficiently agitated to prevent significant settling of mud in a still water column. The stream might, or might not, achieve this, depending on the mud load of the seawater and the velocity and turbidity of the stream.

  7. #17
    Join Date
    Mar 2003
    Location
    falmouth
    Posts
    16,893

    Default Re: Watchet web cam

    Quote Originally Posted by bitbaltic View Post

    2. To ensure that when the gate is closed the water remains sufficiently agitated to prevent significant settling of mud in a still water column. The stream might, or might not, achieve this, depending on the mud load of the seawater and the velocity and turbidity of the stream.
    It never did so before. It just left the trench you mentioned. But in any case, if the cill is at a level to provide floating depth for the bots then there is that same level of water left in the marina to deposit its silt. If left alone, the bed of the marina would rise to the point where it was level with the top of the cill.
    this post is a personal opinion, and you should not base your actions on it.

  8. #18
    Join Date
    Aug 2016
    Location
    Bristol
    Posts
    269

    Default Re: Watchet web cam

    Quote Originally Posted by birdseye View Post
    It never did so before. It just left the trench you mentioned. But in any case, if the cill is at a level to provide floating depth for the bots then there is that same level of water left in the marina to deposit its silt. If left alone, the bed of the marina would rise to the point where it was level with the top of the cill.
    So over time, cill height becomes the new ground level?

    I wonder how long it would take if a sprinkler system was placed along the walls, the cill removed, and for a few hours at low tide, turn on the sprinklers to flush out the collected mud... then put the cill back up at the start of the season? Would the water / sprinklers be cheaper than machinery?

    Possibly even from a tub of collected seawater... sucked from the top, after it's had the mud settled to the bottom per tide?

    Ok, I'm barking mad / spouting garbage, I know!
    YouTube: Gorjus Boating
    Boat: Sealine 195

  9. #19
    Join Date
    Jul 2012
    Location
    Cardiff
    Posts
    188

    Default Re: Watchet web cam

    At leased when their small dredger was working some berths had water now the dredging has stopped there are no water berths not even the hammerheads,

    The hight of the mud is higher than the cill,
    This needs to be sorted out if they want boats back using the marina and spending money in their community.

  10. #20
    Join Date
    Jun 2005
    Location
    Mid Devon
    Posts
    6,385

    Default Re: Watchet web cam

    Does anyone know the cost of a full harbour and marina dredge?
    Brexit: Taking back our freedom as a sovereign nation.

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