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(Article of periodic en Anglais - 2011)

Document title

Real-time measurement and preliminary analysis of debris-flow impact force at Jiangjia Ravine, China

Authors(s) and Affiliation(s)

HU K. (1 2) ; WEI F. (1 2) ; LI Y. (1 2) ;
(1) Key Lab. of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu, CHINE
(2) Inst. of Mountain Hazards and Environment, CAS, Chengdu, CHINE

Abstract

Impact forces associated with major debris flows (Jiangjia Ravine, China, August 25, 2004) were recorded in real time by a system consisting of 3 strain sensors installed at different flow depths. An approach including low-pass filtering and moving average methods were used to preprocess the recorded signals. It was found that the peak grain impacts at different depths were non-synchronous within the debris flows. The impact loadings were far greater than, and not proportional to the fluid pressures. Analysis of the impact force of 38 debris flow surges gives an empirical value for the ratio of the hydrodynamic pressure to the momentum flow density, i.e. the product of debris-flow density and mean velocity square, which provides a very valuable basis for understanding debris flow dynamics and designing debris flow management systems

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2011, vol. 36, no9 [pp. 1268-1278]

Bibliographic references : 33 ref.

Collation : 10 fig., 4 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2155

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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