Observations on powder snow avalanches using videogrammetry

被引：32

作者：

Vallet, J

Turnbull, B

Joly, S

Dufour, F

机构：

[1] Swiss Fed Inst Snow & Avalanche Res, WSL, SLF, CH-7260 Davos, Switzerland

[2] Ecole Polytech Fed Lausanne, Lab Photogrammetry, CH-1015 Lausanne, Switzerland

来源：

COLD REGIONS SCIENCE AND TECHNOLOGY | 2004年 / 39卷 / 2-3期

关键词：

videogrammetry; image processing; powder snow avalanches; avalanche modelling;

D O I：

10.1016/j.coldregions.2004.05.004

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A large powder snow avalanche was artificially triggered at the Swiss Vallee de la Sionne test site on February 7th, 2003. Two synchronised digital video cameras were used to track manually identified features on the surface of the powder cloud. By identifying the same features on different cameras, their three-dimensional location was determined using stereoscopic projection. The surface of the avalanche was inferred from these measurements and used to calculate such quantities as flow height, flow volume and flow velocity. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：153 / 159

页数：7

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