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Fast clogging problem of open check dams and a new type suggestion:curved footed type open check dam

Journal of Mountain Science 2023年第5期20卷 1201-1219页

作者： anilan tugce AKCALI Emre Karadeniz Technical University Department of Civil EngineeringTrabzon 61080Turkiye State Hydraulic Works 6th Regional DirectorateAdana 01120Turkiye

Driftwood is one of the important physical components in mountainous rivers which causes severe hazards due to the clogging of bridges,culverts,and narrow sections during ***,the understanding of driftwood dynamics and mitigation measures are crucial for managing wood in *** check dams are the most commonly used engineering measure for preventing driftwood from reaching downstream ***,these open check dams frequently lose their sediment transport function when they are blocked by sediment and driftwood,especially during major flood *** paper proposes a new type of open check dam for preventing from ***,flume experiments were conducted to examine the influence of different types of open check dams on the characteristics of driftwood *** the model with wood length(LWD)=16.5 cm,wood diameter(D)=15 mm,and wood number(N)=172,the highest trapping efficiency was observed with 90.1%and 87.2%retention rates for the classical debris flow breaker and curved footed open check dams,*** tests showed that through this proposed design,woody debris blockage in a very short time was prevented from the accumulation of woods beside the *** addition to this,most of the sediment passed through the check dam and most of the driftwood got *** can be briefly stated that the geometrical design of the structure plays an important role and can be chosen carefully to optimize trapping *** designing this type of open check dams in mountain river basins,it may provide a better understanding of the driftwood accumulation and basis for the optimal design of these *** development of the solution proposed in this work can pave the way for designing different types of open check dams for effective flood management.

关键词： Debris flow Open check dam Driftwood Trapping efficiency Sediment transport Flood management Riverflow

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