Improving the Evaluation of Slit-Check Dam Trapping Efficiency by Using a 1D Unsteady Flow Numerical Model

Campisano, Alberto; Cutore, P.; Modica, Carlo

doi:10.1061/(asce)hy.1943-7900.0000868

Cited by 31 publications

(20 citation statements)

References 30 publications

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“…When the deposit front reaches the barrier, the formation of a secondary deposit layer can be expected on top of the previous deposit. Thus, the deposit evolves in a succession of quasi-equilibrium states until it reaches the barrier height (Armanini and Larcher, 2001;Campisano et al, 2014;Jordan et al, 2003;Piton and Recking, 2016a). Such hydraulically controlled sediment deposition patterns upstream of permeable barriers occur in case (1.ii), also with a constant sediment supply and discharge but for overflown barriers.…”

Section: Experiments Designmentioning

confidence: 99%

“…Thus, barriers cause backwater, and a hydraulic jump occurs in the upstream. According to the literature (Armanini and Larcher, 2001;Campisano et al, 2014;Piton and Recking, 2016a), the hydraulically controlled formation of sediment deposits upstream of the barrier is initiated immediately downstream of this hydraulic jump. The additional volume of this sediment deposit provokes an increase in the length of the backwater and, in turn, causes a shift of the hydraulic jump in the upstream direction.…”

Section: Experiments Designmentioning

confidence: 99%

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Analysis of mechanical-hydraulic bedload deposition control measures

et al. 2017

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Section: Experiments Designmentioning

confidence: 99%

Section: Experiments Designmentioning

confidence: 99%

Analysis of mechanical-hydraulic bedload deposition control measures

et al. 2017

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“…2) were decided. This type of solutions intends to control the transport and deposition processes of the sediments carried downstream by debris flows, and it is nowadays widely applied all over the world as a short-term mitigation measure [2][3][4]. Whenever properly designed and built, slitcheck dams are normally assumed to allow for finer (harmless) sedi- ments to pass through, while trapping larger blocks.…”

Section: Introductionmentioning

confidence: 99%

“…The successful application of slit dams for debris flow mitigation has been claimed in several experimental and numerical studies [3,[5][6][7][8][9][10][11]. All those studies concluded that the slit width is the key parameter to decrease the debris flow peak discharge and retain the harmful sediments upstream of the dam.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of slit-check dams

Silva¹,

Costa²,

Canelas³

et al. 2016

Int. J. SDP

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This paper presents and discusses the results of laboratory tests and numerical simulations carried out to assess the efficiency of slit dams (open-type retention dams) and applicability as a short-term structural mitigation measure against debris flows in steep torrential channels. Inspired by common slit dam solutions, two different layouts of piers were tested in the experimental study -aligned and V-shaped. Some of the major experimental results about the sediment control efficiency are presented, showing that aligned layout is more appropriate to mitigate stony-type debris flows than the tested V-shaped solution. Actually, it was proved that slit-check dams mitigation efficiency is influenced by various variables and parameters, most of them previously studied by several authors, but also by pier layout in plan view. Considering aligned layout, 1.0d 95 to 1.4d 95 slit widths shall be considered to design effective slit dam solutions. Further, a numerical study was performed, providing relevant data that greatly enriched the experimental efforts and also support future slit dam design phases. The numerical results show similar quantities of retained solid material comparing with the experimental tests, indicating that the model provides reliable results, thus being able to support engineers and decision makers regarding debris flows mitigation.

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“…[2,[5][6][7]), closed-type check dams tend to fail its function in a few years after their construction. In order to overcome this ineffective behaviour, open-type check-dam solutions have been developed since half of the 20 th century and they are widely used at present in countries such as Austria, Japan, and Taiwan [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of plan layout on the sediment control efficiency of slit-check dams for stony type debris flows mitigation

Silva¹,

Costa²,

Cardoso³

2015

WIT Transactions on Ecology and the Environment

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There has been an increasing acknowledgement of debris flows as one of the most relevant geomorphic modifiers of many steepland valleys and fans. Despite it being a well-known phenomenon, debris flows are somehow unpredictable and complex to simulate. Due to several past harmful debris flows worldwide, there are already a significant number of mitigation structures with water and sediment control functions, which are essential features of short-term countermeasures against debris flows. This paper is based on laboratory experiments carried out to test slit dams (open-type retention dams), usually used as a structural countermeasure to mitigate debris flows in steep torrential channels. Flume tests were conducted using a straight channel to assess the influence of different slit-dam solution types on the sediment retention efficiency against stony-type debris flows. Inspired by common slit dam solutions, two different piers layouts in plan view were tested. The experiments were performed with two different discharges and two different slopes. Experimental results about the sediment control efficiency are presented for the different tested solutions.

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Improving the Evaluation of Slit-Check Dam Trapping Efficiency by Using a 1D Unsteady Flow Numerical Model

Cited by 31 publications

References 30 publications

Analysis of mechanical-hydraulic bedload deposition control measures

Analysis of mechanical-hydraulic bedload deposition control measures

Experimental and numerical study of slit-check dams

Effect of plan layout on the sediment control efficiency of slit-check dams for stony type debris flows mitigation

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