BOSCASTLE FLOODS: CASE STUDY Location: Boscastle, N. Cornwall; Rivers Valency & Jordan Date: 16 August 2004 Causes: immediate: a flash flood following fall of 50mm rain in one hour, 125mm in a few hours; this resulted from warm moist air moving onshore meeting air moving overland from the SW ~ air was forced to rise rapidly,– as air rose, and it rained heavily. Causes: other: A very wet August (2 times average rain) meant that the ground was already saturated; water couldn’t be absorbed…
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