摘要
2007年9月底的大潮和中潮期间,在长江口徐六泾处结合采用1台光学后散射浊度仪OBS3A和1台现场激光粒度仪LISST-100(B型)并同步现场采集含沙样本对悬浮泥沙浓度进行了定点现场观测.在对絮凝体中水的体积与絮凝体体积相等这一假设条件进行修正的基础上,利用现场观测得出的絮凝体粒径和有效密度之间的关系以及每个粒径范围的絮凝体所占整个絮凝体的权重,修正了利用单一絮凝体粒径的有效密度代表所有絮凝体的假设,最终得到了更为合理的悬浮泥沙现场沉降速度.
In-situ measurements of settling velocities were conducted at Xuliujing in Changjiang Estuary during a flood tidal and medium tidal from Sept. 2007 to Oct. 2007. An OBS3A and a LISST-100 （Type B） were used together with sufficient water samples to estimate the settling velocity of suspended sediments. Based on the results of measured relationship between the average floe size and floe density, improvement on the original approach was implemented to relax the basic assumption： （1） floe density are the same for all floc size;（2） the volume of void water was included. Thus a better settling velocity of suspended sediment can be estimated.
出处
《华东师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第3期120-126,169,共8页
Journal of East China Normal University(Natural Science)
基金
国家自然科学基金重点项目(50339010)
国家自然科学基金面上项目(50709007)
江苏省普通高校研究生科研创新计划项目(CX07B_135z)
2008年河口海岸科学全国博士生学术论坛资助
关键词
长江口
徐六泾
现场测量
沉降速度
Changjiang Esturay
Xuliujing station
in-situ measurement
settling velocity
