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BRITARCH  November 2007

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Subject:

Re: aqueducts - Colchester

From:

Robin Upton <[log in to unmask]>

Reply-To:

British archaeology discussion list <[log in to unmask]>

Date:

Sun, 18 Nov 2007 18:41:18 -0000

Content-Type:

text/plain

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Hello.

During the Roman period and right up to the late 19th century, and some 
places even later, the water table was a lot higher, some places 100's of 
feet higher than today, even here in Slindon, Sussex postcards from around 
1900 show streams emerging 100ft higher then than now, 60 years ago the 
springs were 50ft higher than now, all due to water extraction.
For Colchester you would need to study the Hydrological properties of the 
under laying rock stratas.
Colchester is in the London Basin which is an artisan basin, the underlaying 
chalk overlays the impermeable gault clays. The Chiltern Hills and the North 
Downs act as a natural artesian aquifer there for the pressure of the water, 
water finds it's own level. Therefore Colchester would not have needed any 
type of external water supply.
Where the Legions built the fort there would have been springs and it would 
not take the engineers long to build an artesian well.
For more information read Principles of Physical Geography by F.J. 
Monkhouse.
----- Original Message ---
From: "John Phillips" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, November 18, 2007 12:14 AM
Subject: Re: [BRITARCH] aqueducts - Colchester


> To: [log in to unmask]
> Subject: Re: [BRITARCH] aqueducts - Colchester
>
> I should add that the spring in the village never seems to dry up. The 
> road
>
> nearby seems to be always wet, even in today's times when the watewr
> companies
> tap every source of subterranean spring. I imagine the springs were
> probably
> much stronger a thousand or so years ago. I daresay it would be nigh on
> impossible to make out such a pipeline by aerial view or magnetometry so,
> perhaps, a theory is all it will remain. One thing is for sure, Colchester
> needed a
> lot of fresh clean water. It must have got it from somewhere as I am  not
> aware of any Roman wells in the town. Norman yes but not Roman. Would it
> have
> been via  rainwater trap/resevoir or had they invented the steam  engine 
> and
>
> were pumping it up to the town? Perhaps what we need is a good
> archaeological
> dig on the site to see what can be found. It is in open fields.  They 
> didn't
>
> build the church on the site, perhaps because it was too wet!
>
> Sdapeze
>
>
>
> 


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