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泥石流堵河已成为当前地质灾害领域研究的热点问题,众多堵河判别式的提出,有效地丰富了泥石流堵河的理论认识和实践防治,但往往缺乏详尽的数据支撑进行验证和反演。针对大渡河中游典型泥石流堵河案例的开展运动过程与堆积区特征分析,得出以下结论:2013年7月4日四川石棉熊家沟泥石流为一次典型的泥石流堵河事件,主要的特征表现为堰塞体形成、主河水位陡涨、对岸建筑物破坏严重、熊家沟具有泥石流沟道形成的流域、动力、物源特征,堵河后,熊家沟泥石流总物源量和动储量较堵河前分别增加116.55%,85.28%。熊家沟的地质灾害孕灾背景有利于堵河事件的频发性,现已进入活跃期;通过多种方法手段,获取了熊家沟泥石流堵河事件的原始数据,分别为10项主河特征数据、11项支沟特征数据,均为当前堵河判别式所需的绝大部分参数,具有很强的客观性和真实性。可为相关泥石流堵河研究提供参考。
The blockage of debris flows has become a hot issue in the current field of geological disasters. The identification of many obstruction drains has effectively enriched the theoretical and practical prevention and control of debris flow. However, it often lacks detailed data support for verification and inversion. According to the analysis of the movement process and the characteristics of the accumulation area of the typical debris flow blockage in the middle reaches of the Dadu River, the following conclusions are drawn: On July 4, 2013, the debris flow in Xiongjiagou, Sichuan asbestos was a typical debris flow blocking event with the main characteristics Weir body formation, the main river level rose sharply, the other side of the building destroyed, Xiongjiagou debris flow channel with the formation of watersheds, power, provenance characteristics, blocking the river, Xiongjiagou debris flow of total amount of resources and reserves of dynamic Clogged before the river increased by 116.55%, 85.28%. The background of the geohazards pregnant in Xiongjiagou is conducive to the frequent occurrence of plugging in rivers and has now entered an active phase. The raw data on the mudslides and river plugging in Xiongjiagou were obtained through various methods and measures, including 10 main rivers The characteristic data and the 11 branch channel characteristic data are the most parameters needed by the current plug-river discriminant, which has strong objectivity and authenticity. It can provide a reference for the research of related debris flow blocking river.