华东师范大学学报(自然科学版) ›› 2009, Vol. 2009 ›› Issue (3): 120-126.

• 河流与海洋 • 上一篇    下一篇

长江口徐六泾洪季泥沙沉降速度研究

邵宇阳1,2，严以新1，马平亚2   

  1. 1. 河海大学 水文水资源与水利工程科学国家重点实验室，南京210098；2. 弗吉尼亚海洋研究所，美国 弗吉尼亚23062
  • 收稿日期:2008-11-09 修回日期:2009-03-02 出版日期:2009-05-25 发布日期:2009-05-25
  • 通讯作者: 邵宇阳

Settling velocity at Xuliujing in Changjiang Esturay

SHAO Yuyang1,2,YAN Yixing1,Jerome MAA PengYea2

  

  1. 1. State Key Laboratory of Hydrology, Water Resources and Hydraulic Engineering,Hohai University, Nanjing210098, China; 2. Virginia Institute of Marine Science,College of William and Mary, Gloucester Point,VA23062, USA
  • Received:2008-11-09 Revised:2009-03-02 Online:2009-05-25 Published:2009-05-25
  • Contact: SHAO Yuyang

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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.

关键词: 长江口, 徐六泾, 现场测量, 沉降速度, 长江口, 徐六泾, 现场测量, 沉降速度

Abstract: 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 floc size and floc density, improvement on the original approach was implemented to relax the basic assumption: (1) floc 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.

Key words: Xuliujing station, insitu measurement, settling velocity, Changjiang Esturay, Xuliujing station, insitu measurement, settling velocity

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