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首页> 外文期刊>Natural Hazards >Coastal circulation along the central west coast of India during cyclone Phyan: measurements and numerical simulations.
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Coastal circulation along the central west coast of India during cyclone Phyan: measurements and numerical simulations.

机译：Phyan飓风期间沿印度中西部海岸的沿海环流：测量和数值模拟。

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摘要

Measurements and numerical simulations carried out off Mumbai coast for the period 22 October-22 November 2009 showed significant variations in water level and currents during cyclone Phyan. Changes in the meridional component of the current velocity were found to be highly significant during Phyan. The strong southward flow due to the cyclone resulted in a complete nullification of a flood current and continued the net flow towards south for approximately 18 h. This enhanced the ebb flow by about 0.12 m/s off Worli and 0.16 m/s off Satpati. The shift in the cyclone generated currents towards north resulted in an enhancement of flood current by 0.3 m/s off Worli and 0.2 m/s off Satpati. During the first 7 h of Phyan, a strong current system associated with an anti-cyclonic eddy was formed off Mangalore, which propagated towards north up to Ratnagiri and disappeared while the cyclone entered the land. Water level variations of 0.38 and 0.44 m were observed due to Phyan off Worli and Satpati, respectively. Positive and negative surges, that is, a fall in water level up to -20 cm and a rise up to 20 cm, were observed during Phyan and these were associated with shift in the wind direction.
机译：2009年10月22日至11月22日在孟买海岸外进行的测量和数值模拟显示，在Phyan飓风期间，水位和水流存在显着变化。发现在Phyan期间，当前速度的子午分量变化非常显着。由于旋风的作用，强烈的向南流动导致洪水流完全消失，并使净水流继续向南流动约18小时。这使落差流量从Worli下降约0.12 m / s，在Satpati下降约0.16 m / s。旋风产生电流向北移动，使洪水电流比Worli上升了0.3 m / s，Satpati上升了0.2 m / s。在Phyan的前7小时内，Mangalore附近形成了与反气旋涡相关的强流系统，该系统向北传播至Ratnagiri，并在旋风进入陆地时消失。由于Phyan off Worli和Satpati，分别观测到0.38和0.44 m的水位变化。在Phyan期间，观察到了正向和负向的波动，即水位下降到-20 cm和上升到20 cm，这与风向的变化有关。

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