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本文介绍了一个在溃坝水流条件下河床和堤岸都由均匀可蚀材料组成的河道地形演变的理想实验,实验目的是研究溃坝水流条件下河道的地形变化,包括河床纵剖面的变化以及河流横断面形状的变化。实验结果与实际观测到的瞬间水流改变河床地形的情况具有良好的一致性,并且可以多次重复模拟河流断面形状的一般演变情况。实验中,采用非侵入式激光板技术对河流断面的变化进行测量,进而获得了一套完整的河道地形随时间演变的观测资料,该资料可用于验证模拟溃坝水流条件下河道地形演变的数学模型。
This paper presents an ideal experiment for the evolution of the terrain of a channel composed of uniformly erodable material under the conditions of damped water flow. The purpose of the experiment is to study the terrain changes of the channel under the conditions of dam-break flow, including the change of the longitudinal profile of the riverbed, Cross-sectional shape changes. The experimental results are in good agreement with the fact that the observed instantaneous water flow changes the river bed topography, and the general evolution of the river cross-section shape can be simulated repeatedly. In the experiment, the non-invasive laser plate technology was used to measure the change of the river section, and then a complete set of observation data about the evolution of the river course over time was obtained. This data can be used to verify the mathematical simulation of the terrain evolution under the condition of damped water flow model.