Abstract
The stretch of the Isarco valley between the localities of Fortezza and Mules (South Tyrol, Italy) is an area prone to debris flows due to the particular combination of climate, morphology and geological conditions. On 14 August 1998 the steep side streams located on the lateral slopes of the valley were swollen due to heavy rainfall and water issuing from joints in the rock mass. This resulted in debris flows which caused damage and resulted in the death of five people on a highway passing through the valley. This rainfall event is compared with previous similar occasions. The paper also assesses empirical formulae developed to estimate the total sediment volume that may be mobilised in a torrent catchment during an extreme rainstorm.
Published Version
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