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Concept
Canal de Bristol
Résumé
The Bristol Channel (Môr Hafren, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales (from Pembrokeshire to the Vale of Glamorgan) and South West England (from Devon, Somerset to North Somerset). It extends from the smaller Severn Estuary of the River Severn (Afon Hafren) to the North Atlantic Ocean. It takes its name from the English city and port of Bristol
Long stretches of both sides of the coastline are designated as Heritage Coast. These include Exmoor, Bideford Bay, the Hartland Point peninsula, Lundy Island, Glamorgan, Gower Peninsula, Carmarthenshire, South Pembrokeshire and Caldey Island.
Until Tudor times the Bristol Channel was known as the Severn Sea, and it is still known as this in both Môr Hafren and Mor Havren.
The International Hydrographic Organization defines the offshore western limit of the Bristol Channel as "a line joining Hartland Point in Devon () to St. Govan's Head in Pembrokeshire ()".
The nearshore limit of the Bristol Channel is between Sand Point, North Somerset (north of Weston-super-Mare) and Lavernock Point (south of Penarth in the Vale of Glamorgan). East of this line is the Severn Estuary. Western and northern Pembrokeshire and north Cornwall are outside the defined limits of the Bristol Channel, and are considered part of the seaboard of the Atlantic Ocean or more specifically, the Celtic Sea.
According to the officially defined limits, the Bristol Channel is approximately from west to east. Taken as a single entity, the Bristol Channel/Severn Estuary system extends eastward inland to the limit of tidal influence at Gloucester Docks. The channel shoreline alternates between resistant and erosional cliff features, interspersed with depositional beaches backed by coastal sand dunes; in the Severn Estuary, a low-lying shoreline is fronted by extensive intertidal mudflats. The Severn Estuary and most of the embayments around the channel are less than 30' (10 metres) in depth.
Source officielle
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