汕头港泥沙来源及运动途径的模糊相似分析

Fuzzy Similarity AnaSysis of Sediment Sourses and Movement in Shan Tou Harbour Channel

在汕头港泥沙运动研究中,由中子活化技术及颗粒级配分析和矿物分析获得样本特征值,由样本特征值建立各子域样本点间的模糊相似关系,从而得到该区域泥沙运动的相似矩阵.由相似矩阵进行模糊聚类分析,得到了汕头港地区底沙输运路径.对于人工开挖航道等造成回淤的情况,本文由线性加权特征值求最大相似度来识别不同泥沙来源淤积量百分比的方法求得航道开挖后淤积物来源百分比,与现场调查分析及物理模型试验结论吻合.

In the research of sediment movement in Shan Tou harbour, the sample characteristic values can be obtained by analyzing the samples from these regions with neutron activation technique, analysis of grain size distribution and mineral analysis. Based on these characteristic values, the fuzzy similarity relationship of sample dots can be developed, and then the similarity matrices of sediment transport in these regions can be obtained. On the basis of these matrices, fuzzy classification analysis can be conducted and each class is souath of sediment transport. As to the silta-tion of artifical navigation channel, a method is proposed by deriving ma-ximun similarity with linear weighted average value to identity the silta-tion percentage of sediment of different sources, which agrees well both with field data and physical model result.