沟岸侧蚀对泥石流形成和运动过程的影响

发布时间：2018-03-23 20:23

本文选题：两相泥石流　切入点：间歇运动　出处：《水科学进展》2017年04期

【摘要】：沟岸被侧蚀掉的松散物质会通过动量交换将能量传递给龙头,从而影响泥石流的形成和运动过程。前人建立了许多模型来研究泥石流的侵蚀过程对泥石流形成和运动过程的影响,但是模型中大多以底蚀作用为前提条件。通过侧蚀模型和底蚀模型两种水槽实验的对比,针对泥石流的形成和运动过程展开研究。实验发现侧蚀作用更有利于泥石流的形成和运动,泥石流的龙头高度和速度都有波动特征,但侧蚀作用使得这种波动特征更加明显。侧蚀作用使得泥石流的龙身速度更快于龙头速度,龙身颗粒源源不断地堆积于龙头,使得龙头有较大的高度和附加坡降,因此,侧蚀条件下龙头的速度更快。
[Abstract]:Loosely eroded material along the banks of the trenches will transfer energy to the faucet through momentum exchange. In order to influence the formation and movement of debris flow, many models have been established to study the influence of debris flow erosion process on the formation and movement of debris flow. However, most of the models are based on the underlying erosion. Through the comparison of flume experiments between the lateral erosion model and the bottom erosion model, According to the formation and motion process of debris flow, the experimental results show that lateral erosion is more favorable to the formation and movement of debris flow, and the leading height and velocity of debris flow have fluctuating characteristics. But the lateral erosion makes the fluctuation more obvious. The side erosion makes the dragon body speed of debris flow faster than that of the faucet, and the dragon body particles pile up continuously in the tap, which makes the dragon head have higher height and additional slope, so, The speed of the faucet is faster under side erosion.
【作者单位】：清华大学水沙科学与水利水电工程国家重点实验室;中国科学院山地灾害与地表过程重点实验室;
【基金】：国家自然科学基金资助项目(51479091) 中国科学院重点部署项目(KZZD-EW-05-01)~~
【分类号】：P642.23

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