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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,  Sukwoo Kim ORD ID 2,  Ju Ung Yun 3,  Jun Kye Won ORD ID 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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