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http://dx.doi.org/10.9720/kseg.2019.1.013

Suggestion on the Dredging Time of Sediments Behind Debris Barrier Using Rainfall Data  

Song, Young-Suk (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources, Head of Geo-Environmental Hazard Research Center)
Kim, Minseok (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Jung, In-Keun (KCT E&C.)
Publication Information
The Journal of Engineering Geology / v.29, no.1, 2019 , pp. 13-21 More about this Journal
Abstract
The rainfall intensity-duration curve (I-D curve) was used for selecting the dredging time of sediments behind a debris barrier which is located at the study area in Inje-gun, Kangwon Province. The I-D curve was newly suggested by using the data of rainfall-induced landslides for about 30 years from June to September in Kangwon Province. According to the monitoring results, the landslides have been not occurred during the monitoring period of the dredged sediments management system at the study area, and also all of the rainfall events were located below the I-D curve. The weight of the dredged sediments measured at the management system in the field was increased but the weight increment was small. It means that the increase of the dredged sediments was not the effect of landslide but the effect of soil erosion at the ground surface due to heavy rainfall. The weight of the dredged sediments behind a debris barrier could be known in real time using the rainfall data measured at the management system. Also, when the I-D curve is used with the management system, it is possible to select the optimum dredging time for sediments behind debris barrier.
Keywords
debris barrier; dredged sediments management system; dredging time; I-D curve; rainfall data;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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