摘要
以狮子洋为例探究了多汊道潮汐通道的纳潮量计算方法,验证了海湾纳潮量计算公式应用在多汊道潮汐通道系统中的可行性,分别采用基于直接观测的流量计算法和基于卫星遥感资料与实测潮位订正的公式法,计算狮子洋1999-07及2005-01的纳潮量,2种方法计算结果误差在18%之内。为进一步研究近年来狮子洋纳潮量变化及其原因,采用公式法计算了2007—2016年每年7月狮子洋纳潮量,结合1999—2011年地形演变特征,说明地形对纳潮量变化的影响。研究发现:狮子洋纳潮量具有4a的周期变化规律,变化特征表现为1999—2007年因航道整治影响,纳潮量增大约10%;2007—2012年,河势较为稳定,纳潮量继续微幅增大;2013—2016年纳潮量小幅减小。
By taking the Shiziyang channel as the example,the method for calculating the tidal prism of tidal channels with multiple branches is studied and the feasibility of the application of the formula for calculating the tidal prism of the bays to a tidal system of multi branching channels is validated.To calculate the tidal prism of the Shiziyang channel in July 1999 and January 2005,the flow calculation method which is based on the direct flow observations and the formula calculation method that is set up based on rectifying the satellite remote sensing data with the measured tidal levels are used respectively.The error of the two methods is within 18%.For further studying the changes of the tidal prism of the Shiziyang channel in recent years and the changing reasons,the tidal prisms of the Shiziyang channel from July 2007 to July 2016 are calculated by using the formula,and the influences of topography on tidal prism are explained by combining with the topographic variations from 1999 to 2011.It is found that the tidal prism of the Shiziyang channel has a changing period of 4 years,showing that from 1999 to 2007 the tidal prism of the Shiziyang channel increased by about 10% due to the channel regulation;from 2007 to 2012 the tidal prism continued to increase slightly while the rivers are relatively stable;and from 2013 to 2016 the tidal prism reduced slightly.
出处
《海岸工程》
2017年第4期59-66,共8页
Coastal Engineering
关键词
狮子洋
纳潮量
多汊道潮汐通道
Shiziyang
tidal prism
tidal channel with multiple branches
