地形情報を用いた地すべり危険地域の判別

概要

論文の詳細を見る
An examination using data for two districts was made of the applicability, to the discrimination of landslide-prone areas, of a quantification-metod-II treatment of six quantities which are obtainable from a topographic map and likely to be related to landslides. The six quantities are elevation, slope inclination, depth from the summit level, height above the river level, relative relief, and valley density. The two districts are the drainage basins of the Sai and Dojiri rivers in the northern part of Nagano Prefecture. A large number of landslides have occurred in these districts. Data were collected from each 5-mm grid square laid in the 1/25,000 topographic map Shinanonakajo. The discrimination for the two districts showed a reliability of 70%, as judged from a comparison with actual landslide data. Of the six quantities, elevation, valley density, and height above the river level had major contributions to the discrimination.
日本自然災害学会の論文
1989-05-31