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The Severn Estuary (Welsh: Aber Hafren) is the estuary of the River Severn, flowing into the Bristol Channel between South West England (from North Somerset, Bristol and South Gloucestershire) and South Wales (from Cardiff, Newport to Monmouthshire).
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 ...
On 30 January 1607, around noon, the coasts of the Bristol Channel and Severn Estuary experienced coastal and tidal flooding in many counties. Pre-dating any modern flood defence construction low-lying land in Devon, Somerset, Gloucestershire, and across South Wales was flooded.
West of this line is the Bristol Channel. In the Severn Estuary (or the Bristol Channel in the last two cases, depending where the boundary is drawn) are the rocky islands called Denny Island, Steep Holm and Flat Holm. The estuary is about 2 miles (3 km) wide at Aust, and about 9 miles (14 km) wide between Cardiff and Weston-super-Mare.
6 February 1809, the Newnham on Severn to Arlingham Passage ferryboat sank in full view of people on both banks of the Severn. Two boatmen on board drowned. 1 February 1868, at the bridge over the Severn at Caersws an approach embankment, damaged by flood water, collapsed under a goods train. The driver and fireman were killed.
The Severn Barrage is any of a range of ideas for building a barrage from the English coast to the Welsh coast over the Severn tidal estuary. Ideas for damming or barraging the Severn estuary (and Bristol Channel) have existed since the 19th century. The building of such a barrage would constitute an engineering project comparable with some of ...
The Severn bore is a tidal bore seen on the tidal reaches of the River Severn in south western England. It is formed when the rising tide moves into the funnel-shaped Bristol Channel and Severn Estuary and the surging water forces its way upstream in a series of waves, as far as Gloucester and beyond. The bore behaves differently in different ...
The Severn Estuary has the second highest tidal range in the world [16] [17] second only to the Bay of Fundy in Eastern Canada. [17] [18] The estuary's funnel shape, its tidal range, and the underlying geology of rock, gravel and sand, produce strong tidal streams and high turbidity, giving the water a notably brown colouration. [19]