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Magnitude and Frequency of Debris-flows Controlling the Storage Pattern on the Flat-board Debris-flow Breaker

  • Crisisonomy
  • Abbr : KRCEM
  • 2017, 13(4), pp.137-149
  • DOI : 10.14251/crisisonomy.2017.13.4.137
  • Publisher : Crisis and Emergency Management: Theory and Praxis
  • Research Area : Social Science > Public Policy > Public Policy in general
  • Received : April 5, 2017
  • Accepted : April 24, 2017
  • Published : April 30, 2017

Jin Hak Kim 1 Chun Kun Woo 2 Jung Il Seo ORD ID 1 Kim, Sukwoo ORD ID 2 Ju Ung Yun 3 Kye-Won Jun 2

1공주대학교
2강원대학교
3국립공원관리공단

Accredited

ABSTRACT

To examine change in storage pattern by magnitude and frequency of debris flows on the flat-board debris-flow breaker (FDB) equipped with side screen and to derive design criteria for a longitudinal length of FDB, we surveyed the amount and grain-size of bed-materials stored by 10-cm distance on the upper surface of FDB using an experimental flume. The results showed that, on the upper surface of FDB, large-sized materials composing storage peak were moved to downstream with increasing volume of supplied bed-materials due to their increasing transport velocity and kinetic energy, thereby increasing total exported volume. In addition, its slit apertures were reduced by the bed-materials stored previously. Therefore, the bed-materials supplied secondarily destroyed and overpassed the peak formed previously, due to the limitation of the FDB length.

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