摘要
为研究自然因素所导致的北仑河口地形改变状况,建立一个平面二维潮流泥沙数值模型,采用有限体积法数值求解,运用实测水文泥沙资料对模型进行率定、验证。结果表明,模型较好地复演了河口的潮流、悬沙运动过程。在此基础上,对河口的悬沙输运和底床冲淤变化进行分析计算,结果显示:夏初时节河口的悬沙含量较小,约3—70mg·L 1,落潮含沙量大于涨潮含沙量;除局地冲淤达0.05m·a 1外,大部分区域冲淤变化不超过0.05m·a 1,河口处于微冲微淤的动态平衡。
To study the seabed change in the Beilun Estuary caused by natural factors, a two-dimensional current sediment numerical model is set up using the finite volume numerical method. This numerical model is validated by the measured hydrological and sediment data. The results show that the model is able to effectively simulated the movements of current and suspended sediment. We also calculate and analyze the suspended sediment transport and seabed scour of the estuary. The results reveal that the suspended sediment concentration is small in early summer, about 3-70 mg·L-1, and the sediment concentration during the ebb tide is larger than that during the flood tide. The changes of erosion and deposition in most regions are no more than 0.05 m·a-1. The estuary is in a dynamic balance of little erosion or deposition.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2013年第6期16-21,共6页
Journal of Tropical Oceanography
基金
国家自然科学基金(40766001)
广西自然科学基金重大项目(2010GXNSFE013001
2012GXNSFEA053001)
关键词
北仑河口
潮流泥沙模型
有限体积法
悬沙输运
底床冲淤
Beilun Estuary
current sediment model
finite volume method
suspended sediment transport
seabed erosion and deposition
