Risk assessment of simultaneous debris flows in mountain townships

Auteur(s) et Affiliation(s)

CUI, P.

CAS Key Lab. of Mountain Hazards and Earth Surface Processes, Inst. of Mountain Hazards and Environment, CAS, Chine

ZOU, Q.

CAS Key Lab. of Mountain Hazards and Earth Surface Processes, Inst. of Mountain Hazards and Environment, CAS, Chine

Univ. of Chinese Academy of Sciences, Chine

Southwest Univ. of Science and Technology, Chine

XIANG, L.-Z.

Chonqing Jiatong Univ., Chine

ZENG, C.

CAS Key Lab. of Mountain Hazards and Earth Surface Processes, Inst. of Mountain Hazards and Environment, CAS, Chine

Univ. of Chinese Academy of Sciences, Chine

Description :
In the Wenchuan earthquake-affected area, the AA. analyzed the compound effects of simultaneous debris flow events, and proposed 3 quantitative methods of debris risk assessment based on kinetic energy, flow depth, and inundation depth. They established a method to determine the vulnerability of different hazard-affected objects, particularly concerning the susceptibility indexes of buildings or structures. By analyzing the elements underlying hazard formation conditions, damage potential, and the socio-economic conditions of mountain townships, they proposed a systematic and quantitative method for risk analysis of mountain townships. Finally, the proposed method was applied to a case study of Qingping Township, which was affected by 21 simultaneous debris flows triggered by a 50-year return period precipitation event. The proposed method analyzed the superposition and chain-reaction effects of disasters and divided the affected area of the township into 3 risk zones.

Type de document :
Article de périodique

Source :
Progress in physical geography, issn : 0309-1333, 2013, vol. 37, n°. 4, p. 516-542, nombre de pages : 27, Références bibliographiques : 2 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, London, Sage Publications

Langue :
Anglais