滑坡涌浪的初始形态及其衰减规律的研究  

Research on initial formation and attenuation of landslide-generated waves

作　　者：岳书波[1] 刁明军[1] 王磊[1] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《水利学报》2016年第6期816-825,共10页Journal of Hydraulic Engineering

摘　　要：通过滑坡涌浪模型试验,运用高速摄像机记录滑坡入水形成涌浪的过程,并采用多功能监测系统测量滑坡涌浪形成后沿程传播的水位变化过程线,揭示了滑坡涌浪的初始运动形态特征和衰减变化规律。由于滑坡体的高速入水,水体的形态从冲溅形态发展到前涌形态再到后溃形态,伴随着冲溅形态水体的大片落下、前涌形态水体的前涌和后溃形态水体的向后溃倒,最终形成初始形态的涌浪。创新性地引入涌浪初始形态Froude数,并据其数值范围将涌浪的初始形态分为三种形态:常规涌浪、推移涌浪、跃冲涌浪。在运动的过程中,常规涌浪衰减为波形较稳定的波;推移涌浪将慢慢地衰减为常规涌浪;跃冲涌浪先衰减为推移涌浪再衰减为常规涌浪。An experimental model system is designed to study landslide- generated waves, a high- speedcamera is used to film the forming process of landslide-generated waves and a system of multi-functionalmonitor is applied to record the height of landslide-generated waves along the channel. The formation andthe attenuation of landslide-generated waves are revealed. After the landslide body with high speed rushinginto the water,waves are generated firstly from swash to forward fall and then back collapse. Introducing alandslide-generated wave pattern Froude number,the initial form of landslide-generated waves is divided in-to three kinds：conventional landslide-generated waves,translation landslide-generated waves and jump land-slide- generated waves. Conventional landslide- generated waves presents stable waveform, translation land-slide-generated waves slowly attenuate to conventional landslide-generated waves,and jump landslide-gener-ated waves first attenuate to translation landslide-generated waves and then to conventional landslide-generat-ed waves.

关 键 词：滑坡涌浪 初始形态 常规涌浪 推移涌浪 跃冲涌浪 衰减规律 

分 类 号：TV135.2[水利工程—水力学及河流动力学]