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On 15 and 16 August 1952, a storm of tropical intensity broke over south-west England, depositing of rain within 24 hours on an already waterlogged Exmoor. It is thought that a cold front scooped up a thunderstorm, and the orographic effect worsened the storm. Debris-laden floodwaters cascaded down the northern escarpment of the moor, converging upon the village of Lynmouth; in particular, in the upper West Lyn valley, a dam was formed by fallen trees etc., which in due course gave way, sending a huge wave of water and debris down the river. A guest at the Lyndale Hotel described the night to the ''Sunday Express'': The River Lyn through the town had been culverted to gain land for business premises; this culvert soon choked with flood debris, and the river flowed through the town. Much of the debris was boulders and trees. Overnight, more than 100 buildings were destroyed or seriously damaged along with 28 of the 31 bridges, and 38 cars were washed out to sea. In total, 34 people died, with a further 420 made homeless. The seawall and lighthouse survived the main flood, but were seriously undermined. The lighthouse collapsed into the river the next day. At the same time, the River Bray at Filleigh also flooded, costing the lives of three Scouts from Manchester who had been camping alongside the river.〔(Filleigh Village hall Memorial )〕 ==Cause== The root cause of the flood was heavy rainfall associated with a low-pressure area that had formed over the Atlantic Ocean some days earlier.〔 〕 As the low passed the British Isles, it manifested as a weather front which caused exceptionally heavy rainfall, the effect of which was intensified because the rain fell on already waterlogged land; the effect was further exacerbated over Exmoor by an orographic effect.〔 The lack of satellite data in 1952 meant the weather could not be forecast as reliably as it can be today.〔 Similar floods had been recorded at Lynmouth in 1607 and 1796. After the 1952 disaster, Lynmouth village was rebuilt, including diverting the river around the village. The small group of houses on the bank of the East Lyn river called Middleham between Lynmouth and Watersmeet was destroyed and never rebuilt. Today, there stands a memorial garden. On 16 August 2004, a similar event happened in Cornwall, when flash floods caused extensive damage to Boscastle, but without loss of life. The hydrological setting of these two villages is very much the same. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lynmouth Flood」の詳細全文を読む スポンサード リンク
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