摘要
为研究潮滩表面沉积物抗剪强度对认识潮滩的地貌演变、沉积过程等的重要作用。以江苏斗龙港潮滩为研究对象,提出了利用沉积物组分间接获取临界起动切应力的反演方法。通过对潮滩表层沉积物进行现场采样和临界起动切应力原位观测,分析了沉积物组分含量与临界起动切应力的关系。结果表明:沉积物临界起动切应力与沉积物D50、黏土含量、粉砂含量和砂含量的相关性相对良好,临界起动切应力与砂含量相关性最高,与D50和黏土含量的相关性较低;临界起动切应力与沉积物D50和砂含量呈线性负相关关系,与沉积物黏土含量和粉砂含量呈线性正相关关系。
It is of great significance to study the critical shearing stress of tidal flat surface sediments for understanding the geomorphic evolution and sedimentary process of tidal flat.Taking the tidal flat of Doulong,Jiangsu Province as the research area,this paper presents an inversion method for indirectly obtaining the critical shearing stress by using sediment components.Based on in-situ sampling and in-situ observation of the critical shearing stress on the surface sediments of the tidal flat,the relationship between the sediment components and the critical shearing stress is analyzed.The results show that the critical shearing stress has a relatively good correlation with D50,clay content,silt content and sand content,and the critical shearing stress has the highest correlation with sand content,but has a low correlation with D50 and clay content.The critical shearing stress has a linear negative correlation with D50 and sand content,and a linear positive correlation with sediment clay content and silt content.
作者
张孝严
Zhang Xiaoyan(Shanghai Investigation,Design&Research Institute,Shanghai 200335,China)
出处
《绿色科技》
2022年第22期125-128,133,共5页
Journal of Green Science and Technology
基金
国家重点研发计划资助项目(编号:2018YFC0407501)
国家自然科学基金资助项目(编号:51620105005)。
关键词
潮滩
沉积物
临界起动切应力
tide beach
sediment
critical startup stress
