Dee Estuary

Coordinates: 53°18′32″N 3°09′25″W / 53.309°N 3.157°W / 53.309; -3.157
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Dee Estuary
Notification
1954 /1984
Natural England website
Designations
Official nameThe Dee Estuary
Designated17 July 1985
Reference no.298[1]

The Dee Estuary (

North Wales Coast Line follows the course of the Dee Estuary between Prestatyn and Chester
.

Geology

The estuary is unusual in that comparatively little water occupies so large a basin. One theory is that larger rivers such as the

mudstones underlying the area. The inner parts of this channel were filled by glacially derived sands and gravels long ago, and infilling by mud and silt has continued since. It is also thought that prior to the ice ages, the estuary received larger river flows as the upper Severn flowed into the Dee near Chirk. For a period, the Mersey may also have flowed into the Dee by means of a channel which it cut through the base of the Wirral Peninsula.[2][3]

Conservation

The estuary is a major wildlife area and one of the most important estuaries in Britain, amongst the most important in Europe for its populations of waders and wildfowl. The Environment Agency is the Conservation Authority, and the estuary is protected or listed under several schemes:

Large parts of the area are within the

RSPB
's Dee Estuary Nature Reserve.

Fishery

The Dee estuary at Parkgate, Wirral

The estuary supports some important natural fisheries, including salmon and trout on their way to and from the freshwater river, as well as sea-fisheries and shell-fisheries, especially cockles.

Trade and industry

From earliest times, the Dee estuary was a major trading and military route, to and from

Burton, Neston, Parkgate, Dawpool, and "Hoyle Lake" or Hoylake.[4] The excavation of the New Cut in 1737, to improve access to Chester, diverted the river's course to the Welsh side of the estuary, but failed to stem the silting up of the river, and Chester's trading function declined as that of Liverpool on the River Mersey grew.[2]
However, Chester was still a major port of passenger embarkation for Ireland until the early 19th century.

The Dee Estuary was industrialised from quite early on in the

colliery. There are also commercial docks at Mostyn
although their use is limited by the tide.

Signs of past industry are visible along the whole length of the estuary especially on the

LeBlanc process used at the James Muspratt alkali works at Flint
.

The Dee estuary also supported industries concerned with the synthesis of PCBs and some pharmaceuticals and was also home to several industrial waste oil-reclamation industries.

As a consequence of its industrial heritage, there are extensive areas of contaminated ground along the shores of the estuary.

The estuary also plays a part in the most modern of industries as it provides the first stage of transport of Airbus A380 wings on their way to Toulouse via barge to Mostyn docks.

References

  • "Dee Estuary citation sheet" (PDF). English Nature. Archived from the original (PDF) on 16 December 2013.
  1. ^ "The Dee Estuary". Ramsar Sites Information Service. Retrieved 25 April 2018.
  2. ^ a b Proudman Oceanographic Laboratory – Dee Estuary Archived 2008-03-12 at the Wayback Machine
  3. ^ Davies et al 2004, Geology of the Country around Flint. memoir of the British Geological Survey, sheet 108 (E&W)
  4. ISBN 978-1-86077-512-3
  5. ^ "Galligu". Archived from the original on 23 December 2011. Retrieved 20 December 2011.

External links

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