tome
New member
All very well ranting, but can you point me to any studies which agree?
I need to know
I need to know
Aggregates
- Thread starter tome
- Start date
oldgit
Well-known member
Suspect a similar amount is removed from the Thames Estuary.
tome
New member
Yes, 6.7 million tonnes from the Thames
Should add that much of this was sand rather than aggs
Should add that much of this was sand rather than aggs
flipper
New member
hardly a rant but I used to do a lot of sport diving on th SW coast a few years ago and the silt attributed to dredging had decimated the scallop population where once you could pick them off the sea bed by the dozen. In any case what would you imagine the sea water quality to be like downtide of a dredging vessel?
Sixpence
Active member
a fair ammount of research was done on the East coast from the Wash down to the Thames apparently , it did show that when you protect one area of coastline it just moved the erosion problem along the coast
BrendanS
Well-known member
There was interesting coverage of dredging off Nash Bank off South Wales in a recent episode of the new series of Coast.
flipper
New member
tome
New member
Thanks for the link, very interesting
My remit is narrow, but such background info helps me understand the subject better
My remit is narrow, but such background info helps me understand the subject better
Sixpence
Active member
I don't envy you Tom , it sounds like you're going to have your work cut out doing anything in that field . Care to give more details of what you'll be involved with ? , or have I missed it ?
alec
New member
[ QUOTE ]
What we're missing here is the fact that attempts to protect the coastline from erosion in one place is leading to erosion further along so maybe it's best to just leave well alone and let the normal course of events take over
[/ QUOTE ]
Yes - we can all cope with that.
I think that this is a wonderful resource that is doing a great job for man.
You can only use it once though. Then it's gone. Rather like oil it, takes millions of years to make.
What we're missing here is the fact that attempts to protect the coastline from erosion in one place is leading to erosion further along so maybe it's best to just leave well alone and let the normal course of events take over
[/ QUOTE ]
Yes - we can all cope with that.
I think that this is a wonderful resource that is doing a great job for man.
You can only use it once though. Then it's gone. Rather like oil it, takes millions of years to make.
PembrokeshirePromise
Member
A range of studies here:
http://www.marinet.org.uk/mad/scientificstudies.htm
Not sure quite what your remit is - but they might at least provide background
http://www.marinet.org.uk/mad/scientificstudies.htm
Not sure quite what your remit is - but they might at least provide background
tome
New member
[ QUOTE ]
You can only use it once though. Then it's gone. Rather like oil it, takes millions of years to make
[/ QUOTE ]
Yes - 13.7 years and then we've had it
You can only use it once though. Then it's gone. Rather like oil it, takes millions of years to make
[/ QUOTE ]
Yes - 13.7 years and then we've had it
2Tizwoz
Well-known member
Rather a lot of sand gravel and silt, supermarket trollies, three piece suites, trees, are carred into the sea each year down our rivers.
Where does the balance lie. Are we retrieving more than is carried down?
Where does the balance lie. Are we retrieving more than is carried down?
2Tizwoz
Well-known member
Re: Aggregates *DELETED*
Post deleted by 2Tizwoz
Post deleted by 2Tizwoz
BrendanS
Well-known member
Way more. Some of the banks that are being dredged have been there for thousands of years or more, and river deposits are a miniscule fraction of what is being dredged.
DanTribe
Well-known member
I thought it was all used for football pitches.
I often hear football results such as :~ Tottenham Albion beat Manchester Hotspurs
10- 2 "on aggregate"
Why don't they play on grass?
I often hear football results such as :~ Tottenham Albion beat Manchester Hotspurs
10- 2 "on aggregate"
Why don't they play on grass?
WoodyP
Well-known member
On the East Coast there has been extensive beach re-nourishment to protect the sea defences using materials derived from deep sea sources. In particular, the Lincolnshire coast, the North Norfolk coast, parts of Suffolk and Essex.
There have also been huge shipments of rock armour from Norway. In fact earlier in the season in the middle of the night I nearly navigated into a 16000 tonne rock barge between Folkestone and Dungeness. Who Put that there? /forums/images/graemlins/shocked.gif
No-one has yet come up with an alternative strategy to protect people and property. Certainly the huge quantities involved are out of sight, and out of mind, unlike inland quarrying, but although there is limited evidence of environmental damage, common sense would indicate that there must be knock on effects to the ecology of the sea.
It ain't going to change though, in the words of Margaret Thatcher, There is no alternative.
There have also been huge shipments of rock armour from Norway. In fact earlier in the season in the middle of the night I nearly navigated into a 16000 tonne rock barge between Folkestone and Dungeness. Who Put that there? /forums/images/graemlins/shocked.gif
No-one has yet come up with an alternative strategy to protect people and property. Certainly the huge quantities involved are out of sight, and out of mind, unlike inland quarrying, but although there is limited evidence of environmental damage, common sense would indicate that there must be knock on effects to the ecology of the sea.
It ain't going to change though, in the words of Margaret Thatcher, There is no alternative.
BrendanS
Well-known member
It is changing. Dredging in Bristol Channel is being phased out.
Do a Google on Nash Bank Dredging. Similar in different parts of the UK
In terms of sea defence strategy, many of the 'strategists' are now in favour of doing nothing and letting nature take it's course in many areas, and only protecting very limited areas of coastline.
Do a Google on Nash Bank Dredging. Similar in different parts of the UK
In terms of sea defence strategy, many of the 'strategists' are now in favour of doing nothing and letting nature take it's course in many areas, and only protecting very limited areas of coastline.
Sgeir
Well-known member
More granularity required
[ QUOTE ]
Did you know that we dredge and land 2.5 million tons of marine aggregates on the s coast each year between poole and shoreham? This represents over 50% of the total 'mined' in England
Top 3 ports for landing with tonnage:
1 Southampton 834,000
2 Shoreham 768,000
3 Bedhampton 212,000
Just wanted to share this
[/ QUOTE ]Dear TomE
I have the utmost respect for your opinions on matters electrical, but you have given us statistics, which, on the basis that 83.7% have been made up on the spot anyway, lack credibility in the provenance department. You may wish to consider some concrete steps on the path to greater granularity.
[ QUOTE ]
Did you know that we dredge and land 2.5 million tons of marine aggregates on the s coast each year between poole and shoreham? This represents over 50% of the total 'mined' in England
Top 3 ports for landing with tonnage:
1 Southampton 834,000
2 Shoreham 768,000
3 Bedhampton 212,000
Just wanted to share this
[/ QUOTE ]Dear TomE
I have the utmost respect for your opinions on matters electrical, but you have given us statistics, which, on the basis that 83.7% have been made up on the spot anyway, lack credibility in the provenance department. You may wish to consider some concrete steps on the path to greater granularity.
BrendanS
Well-known member
Re: More granularity required
What are your reasons to doubt, if these figures are public domain?
What are your reasons to doubt, if these figures are public domain?