Effectiveness and efficiency of slot-check dam system on debris flow control
Effectiveness and efficiency of slot-check dam system on debris flow control
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DOI：
10.5194/nhessd-3-5777-2015
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发表时间：
2015-09
期刊：
影响因子：
--
通讯作者：
Y. Zou;X. Q. Chen
中科院分区：
文献类型：
--
作者：
Y. Zou;X. Q. Chen
抽象的。槽式坝系统通常用于控制与泥石流相关的泥沙输送并减轻泥石流危害。本文旨在对槽型坝系统的现场性能进行评估，并建立验证方法来评价槽型坝系统及各子系统在泥石流泥沙控制中的效率。对云南神沟盆地一系列槽坝坝群的实地调查表明，各坝坝的留沙量与其在坝群中的相对位置有关，从上游到下游逐渐减少。槽式坝子系统内的累积泥沙量与该子系统控制的流域特征密切相关。它随着子系统中最下游大坝的控制流域面积以及大坝到最上游的距离的增加而增大。提出了流域泥石流控制槽坝系统的保护效率评估模型以及与受控流域特征相关的组内各子系统。基于槽坝子系统的节约效率，提出了流域槽坝系统的布置原则，使槽坝系统的设计更加科学。
Abstract. Slot-check dam system is commonly used to control sediment transport associated with debris flows and mitigate debris flow hazards. This paper aims to estimate the performance of the slot-check dam system in the field and set up a verification to evaluate the efficiency of a slot-check dam system and each subsystem in debris flow sediment control. Field survey on a group of a series of slot-check dams at Shengou Basin in Yunnan, China reveals that the conserving sediment volume of each dam is related to its relative location in the group, gradually decreasing from upstream to downstream. The cumulative sediment volume within a subsystem of slot-check dams closely related to the characteristics of the catchment controlled by the subsystem. It increases with the controlled catchment area of the most downstream dam in subsystem and the distance from the dam to the upstream most. Evaluation models for the conserving efficiency of a slot-check dam system on debris flow control in a river basin and each subsystem within the group associate to the controlled catchment characteristics have been proposed. The layout principle of a slot-check dam system in a river basin has been developed based on the conserving efficiency of a subsystem of slot-check dams which would allow the slot-check dam system to be designed in a more scientific way.