An improved method for sand wave morphology discrimination in rivers by combining a flow resistance law and support vector machines

IF 3.5 2区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Yuchuan Bai , Yanjie Sun , Xiaolong Song , Haijue Xu
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引用次数: 0

Abstract

A parameterized expression for sand wave morphology in rivers is established using a flow resistance law while accounting for sediment incipient velocity. A distinct relation is drawn between the proposed characteristic parameters and the sand wave morphology based on flume data. Support vector machines (SVMs) are then used to separate the boundaries of the sand wave morphology due to the high classification accuracy of SVMs. The boundary line data from each sand wave morphology is extracted and fitted to establish a discriminant standard, which is then successfully validated using experimental and quantifiable data. Also, based on the foregoing methodoly, it is further discovered that the short-term significant fluctuation of sand wave morphology is closely correlated with significant channel changes in rivers with a high width-depth ratio, using Yellow River Estuary as an example.

基于流阻法和支持向量机的河流沙波形态识别方法
在考虑泥沙初速度的情况下,利用水流阻力规律建立了河流沙波形态的参数化表达式。根据水槽数据,提出的特征参数与沙波形态之间存在明显的关系。基于支持向量机分类精度高的特点,采用支持向量机对沙波形态边界进行分离。从每个沙波形态中提取并拟合边界线数据,建立判别标准,然后使用实验和量化数据成功验证。此外,基于上述方法,以黄河口为例,进一步发现在高宽深比的河流中,沙波形态的短期显著波动与河道的显著变化密切相关。
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来源期刊
International Journal of Sediment Research
International Journal of Sediment Research 环境科学-环境科学
CiteScore
6.90
自引率
5.60%
发文量
88
审稿时长
74 days
期刊介绍: International Journal of Sediment Research, the Official Journal of The International Research and Training Center on Erosion and Sedimentation and The World Association for Sedimentation and Erosion Research, publishes scientific and technical papers on all aspects of erosion and sedimentation interpreted in its widest sense. The subject matter is to include not only the mechanics of sediment transport and fluvial processes, but also what is related to geography, geomorphology, soil erosion, watershed management, sedimentology, environmental and ecological impacts of sedimentation, social and economical effects of sedimentation and its assessment, etc. Special attention is paid to engineering problems related to sedimentation and erosion.
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