Sediment Trap Function of Open-type Steel Sabo Dam with respect to Shape and Installation Slope

Hiura, Motoki; Nakatani, Kana; Hasegawa, Yuji; Satofuka, Yoshifumi; Mizuyama, Takahisa

doi:10.13101/ijece.10.100

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…Discharge has a significant influence on open Sabo dams. Hiura et al . (2017) investigated the trapping functions of the vertical and horizontal members in an open Sabo dam.…”

Section: Original Articlementioning

confidence: 99%

Method for Evaluating the Trapping Effects of Woody Debris Using a Distinct Element Method

Horiguchi

Katsuki

Ishikawa

et al. 2019

IJECE

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Seventy percent of Japan is mountainous, and there are a number of residential areas near piedmonts and/or downstream alluvial flows. Debris flows, including driftwood, have occurred recently. Hence, it is necessary to take measures against such occurrences. Over the past 30 years, open Sabo dams with steel pipes that are a countermeasure against woody debris and debris flows have been constructed. However, it is difficult for designers to select the optimum spacing between pipes. Therefore, the concept of general entrapment tends to employ smaller spacing intervals between pipes to protect downstream areas, which have a high expectation of security, although open Sabo dams gradually lose their function of routine sediment transport to pass through. Furthermore, in current design methods, the maximum grain size () is applied to determine the optimum spacing interval for entrapment, which does not take into account driftwood and roots. Thus, an effective method to evaluate the effects of woody debris is required to analyze the problems that arise due to trapping effects. We propose a novel method for evaluating the optimum spacing interval of open Sabo dams using a distinct element method. Moreover, the trapping mechanism of woody debris was investigated for open Sabo dams.

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“…Discharge has a significant influence on open Sabo dams. Hiura et al . (2017) investigated the trapping functions of the vertical and horizontal members in an open Sabo dam.…”

Section: Original Articlementioning

confidence: 99%

Method for Evaluating the Trapping Effects of Woody Debris Using a Distinct Element Method

Horiguchi

Katsuki

Ishikawa

et al. 2019

IJECE

Self Cite

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Improving the evaluation of the blockade behavior of open check dams: a small-scale physical modeling

Sun

You

et al. 2022

Bull Eng Geol Environ

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Experimental study on sediment trap capacity of ring net barrier with varying basal openings

Putri

Legono

Rahardjo

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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Ring net barrier is originally developed as a protection from rockfalls, but some countries have proven that this type is also effective in trapping debris flow sediment. In Indonesia, ring net barrier as sediment control is applied by Sabo Research and Development Center in Lumajang, East Java on a slope of 3.48o and is placed 0.8 m above the river bed surface. To identify the optimal position of the basal opening, a hydraulic flume test is performed with a scale of 1:60, 0.6 cm of diameter of ring, and a variety of discharge (11 liters/sec, 8 liters/sec, and 1.8 liters/sec). These numbers are based on the scaling with 10% sediment concentration and a flow time of 144 seconds. The basal opening position is varied from the same elevation as river bed, placed as deep as 1.66 cm and 3.2 cm The results show that ring net can retain more sediment if the net is placed 3.2 cm deep. Therefore, the sediment trap capacity of ring net barrier that is applied in Lumajang can be optimized by shifting the basal opening’s position to 1.92 meters deep from the river bed.

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Sediment Trap Function of Open-type Steel Sabo Dam with respect to Shape and Installation Slope

Cited by 3 publications

References 5 publications

Method for Evaluating the Trapping Effects of Woody Debris Using a Distinct Element Method

Method for Evaluating the Trapping Effects of Woody Debris Using a Distinct Element Method

Improving the evaluation of the blockade behavior of open check dams: a small-scale physical modeling

Experimental study on sediment trap capacity of ring net barrier with varying basal openings

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