The Norfolk BroadsThe Norfolk Broads
Username Password
Norfolk Broads Weather

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)

Welcome to The Norfolk Broads Forum
This is THE Worlds Largest Forum devoted to the Norfolk Broads, here you can discuss issues about the Norfolk Broads. Or just somewhere to chat with others interested in the Norfolk Broads area.

Please Help Support The Norfolk Broads Forum
OR

The Norfolk Broads Forum / Ask JP 5 / Further dredging
login
join
Graphics Off
Search
Forum Members - Book your Hoseasons holiday today, Just call 0345 498 6296

This is a moderated forum Reply to this DiscussionReply to Discussion | Start new discussionNew Discussion << previous || next >> 
Posted By Discussion Topic: Further dredging

Similar Threads That Might Help :
Who lives the furthest away| Far too Easy!| Further Adventures Of Learning To Sail| how far in a week| Like the famous 5 but with a far more cowardly dog| Good food and beer not far from Norwich??...|

book mark this topic Printer-friendly Version  send this discussion to a friend  new posts last

BuffaloBill
Nov-22-2018 @ 6:12 PM                           Permalink
reply
edit
profile
send p.m.
Mardles sometimes
Posts: 3080
Joined: Dec 2008
BuffaloBill
          

Add To Ignore List
Why hasn't the lower Bure by the Yacht Station down to
The Yellow post been dredged, particularly close to and
under the bridges meaning boats having to pass quite
close, and some don't give way and come through the
middle of the Red Arrows leaving no room for boats going
with the tide. It has caused me a couple of problems
over the last 2 years. Can it not be dredged to give us
more room?

The older I get...
The better I was....!!

JP
Nov-22-2018 @ 6:21 PM                           Permalink
reply
edit
profile
send p.m.
Forum Regular
Posts: 222
Joined: Dec 2005
JP
          

Add To Ignore List
Evening BBill,

Will investigate in the morning and come back to you.

Regards

John

BuffaloBill
Nov-23-2018 @ 9:09 AM                           Permalink
reply
edit
profile
send p.m.
Mardles sometimes
Posts: 3080
Joined: Dec 2008
BuffaloBill
          

Add To Ignore List
Thanks John.
I also meant to add that it may help with Batrabill's
comments about lowering water levels around Potter as
the Bure narrows here and I'm sure contributes to
restrictions on the outflow from the Bure. There is a
significant build up of mud around that area which also
can make navigation difficult at times as I mentioned
in my post above.

The older I get...
The better I was....!!

BuffaloBill
Nov-27-2018 @ 8:58 AM                           Permalink
reply
edit
profile
send p.m.
Mardles sometimes
Posts: 3080
Joined: Dec 2008
BuffaloBill
          

Add To Ignore List
Not forgot about me have you John?

The older I get...
The better I was....!!

JP
Nov-27-2018 @ 11:02 AM                           Permalink
reply
edit
profile
send p.m.
Forum Regular
Posts: 222
Joined: Dec 2005
JP
          

Add To Ignore List
Good morning BB,

No certainly not forgotten about you - just been really busy.

The Lower Bure has had a consistent dredging regime for the last 5 seasons, with over 50,000m3 of accumulated sediments being removed.

The section between the Yacht Station and the entrance to Breydon is a canalised channel (heavy sheet piles line the river walls) and this means dredging has to done differently.

Heavy piles rely upon a large proportion of the pile being below the river bed level, this gives the piling its stability and stops the weight of the ground pushing the piling over. Therefore dredging or removing material from the piled edge is not done.
The piled edge is also where the vast majority of obstructions are located (hidden, submerged items deposited into the river system) so staying more central is best when transiting this section.

The nature of the tidal range at this location, coupled with the canalised channel means that the tidal action alone is enough to sweep most sediment out into the sea channel, although this does also mean that some sediment is swept back in on the flood tide.
The channel past the Yacht Station is adequate for two vessels to pass side by side as long at the adhere to the posted speed limit, they understand what the tide is doing (ebbing or rising) and they avoid hugging the edge (too close to the piled edge).

Therefore when we survey this lower section of the Bure, it does not normally need any sediment removal in order to maintain its specification.

Hope that answers your question.

With regards

John


Home Photo Gallery Days Afloat Contact Us
Chat Room Downloads Norfolk Broads @ Amazon Make My Logo
Shops & Businesses Members Gear Norfolk Broads @ EBay Holiday Calendar
Pub Guide Tide Tables SOS List Popular Threads
2017 Calendar Contest Make A Donation Links Hireboat Info
Norfolk Broads @ CafePress FAQ Broads Quiz Forum Events
Advertise With Us Forum Shop Boating Bits Stickys and FAQs Boating Bits Hirecraft List

 

 

 



Copyright © 2005 Y2KInternet, All Rights Reserved.