Electromagnetic Observations of Water Flow in the Menai Straits
Electromagnetic Observations of Water Flow in the Menai Straits
复制标题
梅奈海峡水流电磁观测
DOI：
10.1111/j.1365-246x.1971.tb02176.x
复制
发表时间：
1971
影响因子：
2.8
通讯作者：
W. J. Gould
中科院分区：
文献类型：
--
作者：
J. Simpson;A. Forbes;W. J. Gould
本文用电磁法研究了狭窄潮汐通道中的水流。用直流电流计测定了电压-水流速度关系，结果表明，仅由局部感应引起，因此可用作截面平均速度的指示器。此校准数据已被用来，连同潮汐过滤器，以确定在通道中的非潮汐运输及其与潮差和风应力的关系。在无风的情况下，平均大潮时的余流为-800 m3 s-l，小潮时的余流为-330 m3 s-l。风应力的影响是显着的，与流量的变化为-190 m3 s-l的100 m2 s-'风应力作用沿着海峡的方向。当西南风强劲时，主导气流会向西南方向移动。
Summary The flow of water in a narrow tidal channel has been investigated by the electromagnetic method. A determination of the voltage-water velocity relation using direct current meters, has shown that the e.m.f. is due to local induction only, and may therefore be used as an indicator of mean velocity across the section. This calibration data has been used, together with a tidal filter, to determine the non-tidal transport in the channel and its relation to tidal range and windstress. In the absence of wind, the residual flow is -800m3 s-l at mean springs, and -330 m3 s-l at neaps. The effect of windstress is marked, with a change in flow of - 190 m3 s-l for 100 m2 s-' windstress acting along the direction of the Straits. Reversal of the predominant flow to the S.W. occurs for strong S.W. winds.