Affiliations: State Key Hydraulics Lab. of High Speed Flow, Sichuan
University, Chengdu 610065, China. E-mail: wangwei@mail.sc.cninfo.net
Abstract: Chengdu-Kunming Railway is an important transport line on
southwestern China. However, this railway's safety is often threatened by
debris flows. How to effectively forecast and alarm the debris flow disasters
and reduce the losses is the aim to study the prevention system in this paper.
The factors to cause or influence debris flow are divided into four parts - the
basin environmental factors, the basin meteoric factors, the prevention work's
elements and the flood-relief work's elements, and the prevention system is
made up of three models - a judgment model to assess the debris flow gully's
seriousness, a forecast model to predict the debris flow's occurrence and an
alarm model to evaluate the debris flow's disaster. Afterwards, a concise
structure chart is worked out and verified by the field data from
Chengdu-Kunming Railway. This prevention system will provide beneficial
reference for the debris flow's monitoring network to be executed on
Chengdu-Kunming Railway.
Keywords: debris flow disaster, Chengdu-Kunming Railway, prevention system