动态图像法应用于海滩沉积物粒度粒形测试及其与筛析法的比较

发布时间：2018-03-10 19:11

本文选题：动态图像法　切入点：Camsizer　出处：《沉积学报》2016年05期 　论文类型：期刊论文

【摘要】：筛析法是海滩沉积物粒度分析较经典和常用的方法。随着科学技术的发展,利用动态图像法分析沉积物粒度逐渐得到推广。本文利用动态图形法和筛析法对海南岛5个海滩剖面20组沉积物样品进行粒度粒形测试,并将两种方法所测得的粒度进行比较。测试分析结果显示,该方法的测试结果重复性好,精度高;通过与筛析法的对比显示,动态图像法与筛析法的测试结果非常接近,粒度级配曲线基本一致,各个粒度参数值很接近且相关性非常好(R20.94);由动态图像法得出的粒形参数可以看出,粒径相当的不同海滩沉积物粒形参数有很大差别,同一海滩不同部位的球形度和宽长比变化很大,对称度和凹凸度变化稍小。研究表明,动态图像法与筛析法之间的粒度分析差异主要来自于两者测量原理的不同和天然海滩砂颗粒形状的不规则;动态图像法解决了不规则沉积物粒度的测量。因此,动态图像法可以替代筛析法来测量沉积物粒度,应用前景广阔。
[Abstract]:Sieve analysis method is a more classical and commonly used method for the analysis of beach sediment particle size. With the development of science and technology, Using dynamic image method to analyze sediment grain size has been popularized gradually. In this paper, 20 groups of sediment samples from 5 beach sections of Hainan Island were measured by dynamic pattern method and sieve analysis method. The results of test and analysis show that this method has good repeatability and high precision, and the dynamic image method and sieve analysis method are very close to each other. The grain size distribution curve is basically the same, and the particle size parameter values are very close and the correlation is very good. The grain shape parameters obtained from the dynamic image method can be seen that there are great differences in the grain shape parameters of different beach sediments with the same particle size. The sphericity and aspect ratio of different parts of the same beach vary greatly, while the symmetry and convexity change slightly. The difference of particle size analysis between dynamic image method and sieve analysis method is mainly due to the difference of measuring principle and irregular shape of natural beach sand. Dynamic image method solves the measurement of irregular sediment particle size. Dynamic image method can be used to measure sediment particle size instead of sieve analysis method.
【作者单位】：华东师范大学河口海岸学国家重点实验室;德国莱驰科技;
【基金】：海洋公益性行业科研专项(201405037)~~
【分类号】：P736.21

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