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The transverse dynamics of flow in a tidal channel within a greater strait

机译：大海峡内潮汐通道内水流的横向动力学

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Vessel-mounted ADCP measurements were conducted to describe the transverse structure of flow between the two headland tips in Khuran Channel, south of Iran (26A degrees 45' N), where the highest tidal velocities in spring tides were similar to 1.8 m/s. Current profiles were obtained using a 614.4 kHz TRDI WorkHorse Broadband ADCP over nine repetitions of three cross-channel transects during one semidiurnal tidal cycle. The 2.2-km-long transects ran north/south across the channel. A least-square fit to semidiurnal, quarter-diurnal, and sixth diurnal harmonics was used to separate the tidal signals from the observed flow. Spatial gradients showed that the greatest lateral shears and convergences were found over the northern channel and near the northern headland tip due to very sharp bathymetric changes in this area. Contrary to the historical assumption, the across-channel momentum balance in the Khuran Channel was ageostrophic. The current study represents one of the few examples reported where the lateral friction influences the across-channel momentum balance.
机译：进行了安装在船上的ADCP测量，以描述伊朗南部（26A度45'N）在库兰海峡的两个岬角尖端之间的横向流动结构，其中春季潮汐的最高潮汐速度类似于1.8 m / s。在一个半日潮汐周期内，使用614.4 kHz TRDI WorkHorse宽带ADCP在三个交叉通道样线的九次重复中获得了当前剖面。 2.2公里长的横断面横跨该通道向北/向南延伸。半日，四日和六日谐波的最小二乘拟合用于将潮汐信号与观测到的流量分开。空间梯度表明，由于该地区非常严重的测深变化，在北部通道和北部岬角尖端附近发现了最大的横向剪切和收敛。与历史假设相反，Khuran通道的跨通道动量平衡是陈旧的。当前的研究代表了少数几个侧向摩擦影响跨通道动量平衡的例子之一。

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