1974年台風18号による四国中央部の山地崩壊の実態

Abstract

The 18th typhoon in 1974 carried heavy rain with it, and a lot of mountains inShikoku were damaged by landslides. The writer has walked around to see what are theactual condition of landslides in central Shikoku, and obtained results as follows.1) The landslides have two types; a small scale of landslide and a debris flow, andthey are closely connected with the geological condition of the mountains around.2) From a geomorphological viewpoint, the landslides are largely seen in areas witha steep slope and a high valley density.3) The greater part of the small scale of landslides occurred at the zero oder vally.