摘要
钱塘江河口与长江河口比邻,其水体和物质交换必然受到相当的影响.针对此类情况,以浓度分布受河口上游径流控制的溶解态保守物质作为示踪剂,建立相应的水动力和对流扩散模型,并在此基础上,利用淡水组分法计算了在不同径流量条件下钱塘江河口水体的冲洗时间。结果表明,钱塘江河口水体冲洗时间枯季为146.4d、常年平均流量下为136.3d、洪季为121.8d,河口水体的冲洗时间随径流量增大而变短。
As Qiantang Estuary locates next door to Yangtze Estuary,the exchange of water and material is bound to be considerably affected.For such a case,using one type of dissolved conservative material whose concentration distribution is controlled by freshwater input as a tracer,a 2D hydrodynamic equation and an advection-diffusion equation are established.And on that basis,the flushing time is calculated by the fraction of freshwater method under different discharge conditions.The result shows that the flushing time is 146.4 d in dry season,136.3 d for yearly averaged discharge and 121.8 d in flood season.The flushing time turns shorter with the increasing of discharge in Qiantang Estuary.
出处
《浙江大学学报（理学版）》
CAS
CSCD
2012年第6期711-716,共6页
Journal of Zhejiang University（Science Edition）
关键词
钱塘江河口
冲洗时间
淡水组分法
数值模拟
Qiantang Estuary
flushing time
fraction of freshwater method
numerical simulation
作者简介
姚炎明(1964-),男,博士,副教授,主要从事海岸工程环境数值计算,E-mail:hotfireyao@163.com.;
