韦帕台风对连云港典型水域波能损耗及悬沙含沙量影响研究  

The influence of Typhoon Wipha on the loss of wave power and the suspension sediment concentration during wind process on muddy coast in Lianyungang

作　　者：杨氾[1,2] 张玮[1] 

机构地区：[1]河海大学港口航道及近海工程学院,江苏南京210098 [2]南京水利科学研究院,江苏南京210024

出　　处：《海洋工程》2012年第4期82-89,共8页The Ocean Engineering

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA112509);江苏省交通科学研究计划资助项目(20100714-30HDKY001-2);2011年度江苏省研究生培养创新工程(CX2211-0449)

摘　　要：旨在建立淤泥质海岸条件下波能功率沿程损耗和水体悬沙垂向悬浮功率之间的时间对应关系。通过韦帕台风时期连云港波浪数学模型,求解了测点处波能功率沿程损耗的变化过程。结合实测资料进行分析后认为,该过程与波高过程存在相位差,同时与实测水体悬沙含沙量变化过程对应关系较好。结合以往研究成果,说明利用波能功率衰减变化推求淤泥质海岸风天条件下的水体含沙量变化可以同时满足空间和时间上对应关系。还分析了底部摩阻损耗与底部含沙量之间的对应关系,两者在时空分布上也较为吻合。通过韦帕台风实测资料和数学模型结果,推求出波能功率沿程损耗与悬沙垂向悬浮功率之间的转化因子为0.3。This paper aims to establish the temporal relationship between the on-way loss of the wave power and the vertical power of the suspension sediment on the muddy coast.First,the process of the wave power on-way loss was calculated through the mathematical wave model at Lianyungang in Typhoon Wipha（2007）.Both the observation data and the model result show that the process of wave power on-way loss lags behind that of wave height and is in good agreement with the process of suspension sediment concentration.The result of this paper and the existing research achievements show that the wave power on-way loss has both spatial and temporal correspondence with the vertical mean sediment concentration.This paper also analyzes the relationship between the wave power friction loss and sediment concentration at base,which also has a temporal correlation.Finally,based on both the field data in Typhoon Wipha and the result of mathematical model,the efficiency factor between wave power on-way loss and the vertical suspension power of the sediment is calculated,and it is 0.3.

关 键 词：淤泥质海岸 台风 波能损耗 含沙量 连云港 

分 类 号：TV148[水利工程—水力学及河流动力学]