摘要
黄河口海域盐度变化受黄河入海径流量、气候及海洋动力条件的影响,河口沉积物的沉降、固结及侵蚀等动力学行为与黄河口海域盐度变化有密切关系。为研究不同盐度环境对河口沉积物抗侵蚀性变化的影响,在现代黄河三角洲刁口河路潮滩上进行原位试验,模拟不同盐度的沉积环境,使用黏结力仪(CSM)对细粒沉积物进行抗侵蚀性测试。结果表明细粒沉积物的临界剪应力为0.728~1.581Pa,且随着沉积环境盐度增加,细粒沉积物的临界剪应力呈线性增加。当沉积环境盐度增加1时,其临界剪应力增加约0.02Pa。
Climate and ocean dynamic conditions always affect water salinity in the Yellow River Estuary,and the dynamic behavior of estuarine sediments is closely related to the salinity fields.In order to study the impact of different environment onto the erosion-resistance pattern of estuarine sediments,in-situ measurement of the erosion and resistance of fine-grained sediment have been conducted using CSM(Cohesive Strength Meter)on the tidal flat of the modern Yellow River delta,simulating different salinity fields.The results show that the critical erosion shear stress of fine-grained sediments varies between0.728~1.581 Pa.The critical shear stress of fine sediments linearly increases with the increase in salinity.When the salinity increases by 1,corresponding critical shear stress increases about 0.02 Pa.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2016年第5期35-41,共7页
Marine Geology & Quaternary Geology
基金
国家自然科学基金项目(41372287
41272316
41402253)
关键词
细粒沉积物
盐度环境
临界剪应力
抗侵蚀性
抗剪强度
fine-grained sediments
salinity fields
critical shear stress
erosion-resistance
shear strength