Statistical analysis of landslide events in Central America and their run-out distance

被引：46

作者：

Devoli G. ^{[1
,2
]}

De Blasio F.V. ^{[1
,2
]}

Elverhøi A. ^{[1
,2
]}

Høeg K. ^{[1
,2
]}

机构：

[1] International Centre for Geohazards, c/o Norwegian Geotechnical Institute, Oslo 0806, Ullevaal Stadion

[2] Department of Geosciences, University of Oslo, Oslo 0316, Blindern

来源：

Geotechnical and Geological Engineering | 2009年 / 27卷 / 1期

关键词：

Central America; Debris flows; Lahars; Landslides; Nicaragua; Run-out distance;

D O I：

10.1007/s10706-008-9209-0

中图分类号：

学科分类号：

摘要：

Statistical analyses of landslide deposits from similar areas provide information on dynamics and rheology, and are the basis for empirical relationships for the prediction of future events. In Central America landslides represent an important threat in both volcanic and non-volcanic areas. Data, mainly from 348 landslides in Nicaragua, and 19 in other Central American countries have been analyzed to describe landslide characteristics and to search for possible correlations and empirical relationships. The mobility of a landslide, expressed as the ratio between height of fall (H) and run-out distance (L) as a function of the volume and height of fall; and the relationship between the height of fall and run-out distance were studied for rock falls, slides, debris flows and debris avalanches. The data show differences in run-out distance and landslide mobility among different types of landslides and between debris flows in volcanic and non-volcanic areas. The new Central American data add to and seem consistent with data published from other regions. Studies combining field observations and empirical relationships with laboratory studies and numerical simulations will help in the development of more reliable empirical equations for the prediction of landslide run-out, with applications to hazard zonation and design of optimal risk mitigation measures. © Springer Science+Business Media B.V. 2008.

引用

页码：23 / 42

页数：19

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