基于FCM方法的黄河水下三角洲沉积动力环境分区

发布时间：2018-01-12 17:41

本文关键词：基于FCM方法的黄河水下三角洲沉积动力环境分区　出处：《海洋学报》2016年09期 　论文类型：期刊论文

【摘要】：客观定量地确定沉积动力环境分区是理解区域沉积动力过程的重要基础。本文以黄河水下三角洲表层沉积物的粒度分析数据为基础,运用模糊c均值聚类(FCM)等方法对该区域的沉积动力环境进行了分类、识别、分区及制图表达。结果表明,研究区域的沉积动力环境可分为3个类别,分别代表了冲刷、冲淤混合和淤积3类不同形式的沉积动力环境。各类别沉积动力环境的隶属度分布图具有指示其在不同空间位置处出现的可能性大小及其优势分布区的作用,而由模糊隶属度值生成的沉积动力环境分区图也与研究区域实际的沉积动力空间格局有着较高的吻合度,表明制图结果是合理和有效的。研究结果可为黄河三角洲滨海区地貌演变趋势分析和海岸防护提供重要的参考价值。
[Abstract]:Objective and quantitative determination of sedimentary dynamic environment zoning is an important basis for understanding the regional sedimentary dynamic process. This paper is based on the grain size analysis data of surface sediments in the Yellow River underwater delta. The sedimentary dynamic environment of this area is classified, identified, zoned and expressed by means of fuzzy c-means clustering and FCM. The results show that the sedimentary dynamic environment of the studied area can be divided into three categories. Represents a scour. There are three different types of sedimentary dynamic environment. The distribution of membership degree of each kind of sedimentary dynamic environment has the function of indicating the possibility of its appearance at different space position and its dominant distribution area. And the zoning map of sedimentary dynamic environment generated by fuzzy membership value also has a high consistency with the actual sedimentary dynamic spatial pattern in the study area. The results show that the mapping results are reasonable and effective, and the results can provide an important reference value for the analysis of geomorphological evolution trend and coastal protection in the Yellow River Delta coastal area.
【作者单位】：淮海工学院测绘工程学院;华东师范大学河口海岸学国家重点实验室;盐城师范学院城市与资源环境学院;
【基金】：国家自然科学基金项目(41306077) 淮海工学院自然科学基金项目(Z2014017) 教育部高等学校青年骨干教师国内访问学者项目
【分类号】：P736.21
【正文快照】： 1引言沉积动力环境分区是海洋沉积学的重要研究内容之一,它是正确认识区域沉积环境特征的前提,也是理解区域沉积动力过程的基础。沉积动力环境分区研究一般涉及两方面的基本内容:一是沉积环境特征识别,二是分区及制图表达。由于粒度及其分布特征是沉积过程的客观记录,因此粒度

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