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Abstract

Advancements in Civil Engineering & Technology

Recovery Period of Fluvial Sediment Transport after a Major Earthquake

  • Open or Close Guan Wei Lin* and Hsien Li Kuo

    Department of Earth Sciences, National Cheng Kung University, Taiwan

    *Corresponding author: Guan-Wei Lin, Department of Earth Sciences, National Cheng Kung University, Taiwan

Submission: May 25, 2018; Published: June 21, 2018

DOI: 10.31031/ACET.2018.01.000514

ISSN 2639-0574
Volume1 Issue3

Abstract

Fluvial sediment transport reflects the rate of geomorphic change in river catchment. By retrospection long-term observation data of fluvial sediment, the recovery period of sediment transport after a large earthquake can be assessed. We proved that the recovery period in a given catchment is positively correlated with the peak ground motions triggered by an earthquake. The correlation indicates that a recovery period of more than four years is required if a catchment is affected by an earthquake with a ground acceleration greater than 400gal. Major earthquake is an important factor for sediment yield, especially within a few years after a large earthquake. Therefore, within a few years after a major earthquake, fast geomorphic change in river catchment should be considered as one of environmental conditions for engineering and natural-disaster prevention work.

Keywords: Recovery period; Fluvial sediment; Earthquake; Unit concentration

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