AS Geography Flooding Case Studies Case studies for As level Geography 3.5 / 5 based on 4 ratings ? GeographyCase studiesASAll boards Created by: Jack BurrowsCreated on: 12-01-11 14:22 Boscastle Floods 16th Augst 2004-Southern Britain, Cornwall, Bostcastle Thundery down pours had developed due to intensive low-preassure, causing the uplift of warm & moist air 200mm of rain fell in 24 hours, most of it between miday-5pm Rainfall most intensive between 3pm-4pm when it exceeded 100mm h Rainfall very localised Heaviest rain to the east of Boscastle on the higher ground High land encouraged precipitation in the form of orographic rainfall The ground was already saturated due to previous wet weather, so infiltration into the ground was limited 1 of 3 Boscastle Floods Boscastle located in a deep valley down stream of the confluence of the rivers Valency and Jordan Runoff into the river was rapid Flooding was first reported at 4pm 60 or so properties were submerged under floodwater-Not all in Bostcastle, some in the catchment of the tributary of the River Jordan 70-80 cars were swept away 100 people airlifted Significant damage to property, roads, bridges, and servicesbut no loss of life 2 of 3 MEDC:Southern Britain, July 2007 Summer weather conditions were exceptional Rainfall totals for May-July 2007 were the highest on record for England and Wales since 1766 20 July there was exceptional rainfall 145 mm of rainfall in Pershore in Worcestershire 111mm at Chieveley (Berkshire) 120 mm at Brize Norton (Oxfordshire) Such a storm only expected every 100 years 3 of 3
Comments
Report