基于河流阻力规律的非粘性河型分类方法研究

发布时间：2018-06-16 16:48

本文选题：非粘性河流 + 河流阻力规律　；参考：《天津大学》2014年硕士论文

【摘要】：在自然界中,河流系统分布广泛,且与人类活动密切相关,河流形态特征的变化规律是人类认识与改造河流的主要课题,了解其类型特点是河流研究中的重要内容。水流在其行进过程中遵守阻力规律,由于周围环境的不同,其宏观表现形式也多种多样。河流的阻力规律决定于其形态特征,同时河流形态特征也反映其阻力规律。本文考虑影响河流水力损失的多种因素,引入无量纲的河流形态参数,得到自然河流的阻力规律表达式。由该阻力规律出发,得到河流形态参数的表达式,并将其作为河流分类标准。本文还加入了地貌因素的影响,应用得到的表达式细致划分了河流类型。为了证明该分类方法的正确性,本文采用经典数据集验证和室内试验验证两种方法进行分析,对比发现,本文中所得到的河流理论类型与其他学者得到的结果符合良好,虽然存在少量偏差数据点,但通过文中的详细分析,更为证实了该方法的优越性。研究结果表明,该分类方法计算简单,对于非粘性河流应用效果较好。
[Abstract]:In nature, the river system is widely distributed and closely related to human activities. The change law of river morphology is the main topic of human understanding and transformation of rivers, and understanding its type is an important part of river research. The flow obeys the law of resistance in the course of its travel, and its macroscopic forms are varied because of the difference of the surrounding environment. The resistance law of rivers is determined by their morphological characteristics, and the characteristics of rivers also reflect their resistance laws. In this paper, considering many factors affecting river hydraulic loss, the dimensionless parameters of river form are introduced, and the expression of resistance law of natural river is obtained. According to the law of resistance, the expression of river shape parameters is obtained, and it is regarded as the standard of river classification. The effects of geomorphological factors are also included in this paper, and the derived expressions are used to divide the river types in detail. In order to prove the correctness of the classification method, the classical data set verification method and the indoor test verification method are used in this paper. The comparison shows that the river theory types obtained in this paper are in good agreement with the results obtained by other scholars. Although there are a few deviation data points, the advantages of this method are proved by the detailed analysis in this paper. The results show that the classification method is simple and effective for non-viscous rivers.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV147

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