淤泥质和粉沙质海岸分类标准研究*

在海岸性质分类标准研究成果的基础上，根据黏粒含量15%～25%泥沙水力特性试验成果，引入黏粒含量作为间接、量化指标开展淤泥质和粉沙质海岸分类标准深化研究。分析表明，中值粒径大于0.10 mm、黏粒含量几乎等于0%的海岸属于沙质海岸；中值粒径介于0.03～0.10 mm、黏粒含量小于10%的海岸属于粉沙质海岸；中值粒径小于0.03 mm、黏粒含量大于等于25%的海岸属于淤泥质海岸，黏粒含量介于10%～25%的海岸定名为淤泥质与粉沙质过渡区海岸。研究成果为国内外淤泥质海岸研究在海岸工程的应用上提供了新的研究实例。

Classification criteria of muddy and silty coasts

Based on the previous research on the classification criteria of different coasts,we carry out an in-depth research on the classification criteria of muddy and silty coasts according to the hydraulic experiment of sediment with clay content between 15% and 25%.It is shown that coasts with median diameter greater than 0.10 mm and clay content no better than 0% are defined as the sandy coast.The coasts with median diameter between 0.03 mm and 0.10 mm and clay content less than 10% are defined as the silty coasts.The coasts with median diameter less than 0.03 mm and clay content greater than or equal to 25% are defined as the muddy coasts,and that clay content ranging from 10% to 25% are defined as transition zone between muddy and silty coasts.The results provide a new case study for the application of the domestic and foreign research on the coastal engineering of the muddy coast.