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首页> 外文期刊>Estuarine Coastal and Shelf Science >Storm surge induced flux through multiple tidal passes of Lake Pontchartrain estuary during Hurricanes Gustav and Ike
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Storm surge induced flux through multiple tidal passes of Lake Pontchartrain estuary during Hurricanes Gustav and Ike

机译：在飓风古斯塔夫和艾克期间，风暴潮引起的庞恰特雷恩湖河口多次潮汐通量引起的通量

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摘要

In September 2008, Hurricanes Gustav and Ike generated major storm surges which impacted the Lake Pontchartrain estuary in Louisiana. This paper presents analyses of in situ measurements acquired during these storm events. The main data used in the analyses were from three bottom mounted moorings equipped with conductivity, temperature, and depth sensors, acoustic Doppler current profilers (ADCPs), and a semi-permanent laterally mounted horizontal acoustic Doppler profiler (ADP). These moorings were deployed in the three major tidal channels that connect Lake Pontchartrain with the coastal ocean. A process similar to tidal straining was observed: the vertical shear of the horizontal velocity was negligible during the inundation stage, but a shear of 0.8 m/s over a less than 5 m water column was recorded during the receding stage, 2-3 times the normal tidal oscillations. The surge reached its peak in the Industrial Canal 1.4-2.1 h before those in the other two channels. The inward flux of water lasted for a shorter time period than that of the outward flux. The inward flux was also observed to have much smaller magnitude than the outward flux (～960-1200 vs. 2100-3100 million m~3). The imbalance was believed to have been caused by the additional water into Lake Pontchartrain through some small rivers and inundation over the land plus rainfall from the hurricanes. The flux through the Industrial Canal was 8-12%, while the flux through the other two tidal passes ranged between 17% and 70% of the total, but mostly split roughly half-half of the remaining (～88-92% of the total).
机译：2008年9月，古斯塔夫（飓风）和艾克（Ike）飓风激增，影响了路易斯安那州庞恰特雷恩湖河口。本文介绍了在这些风暴事件中获得的现场测量结果的分析。分析中使用的主要数据来自三个底部安装的系泊设备，这些设备配备了电导率，温度和深度传感器，声学多普勒电流剖面仪（ADCP）和半永久性横向安装的水平声学多普勒剖面仪（ADP）。这些系泊设备部署在连接庞恰特雷恩湖和沿海海洋的三个主要潮汐通道中。观察到与潮汐应变相似的过程：在淹没阶段，水平速度的垂直剪切可忽略不计，但在后退阶段，在不到5 m的水柱上记录到0.8 m / s的剪切，是2-3次正常的潮汐振荡。在其他两个渠道中，激增高峰在1.4-2.1小时的工业运河中达到顶峰。水的内向通量比外向通量持续的时间短。还观察到内向通量的大小要比外向通量小得多（〜960-1200对2100-3100百万m〜3）。据认为，这种不平衡是由于通过一些小河流入庞恰特雷恩湖的额外水，土地被洪水淹没以及飓风带来的降雨造成的。通过工业运河的流量为8-12％，而通过其他两个潮汐通道的流量为总量的17％至70％，但大部分为剩余流量的一半（约占88-92％）。总）。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2010年第4期|p.517-525|共9页
  • 作者

    Chunyan Li; Eddie Weeks; Brian W. Blanchard;

  • 作者单位

    Department of Oceanography and Coastal Sciences, School of the Coast and Environment, Louisiana State University, Baton Rouge, LA 70803, USA College of Marine Sciences, Shanghai Ocean University, 999 Hucheng Huan Road, Shanghai 201306, China;

    Department of Oceanography and Coastal Sciences, School of the Coast and Environment, Louisiana State University, Baton Rouge, LA 70803, USA;

    Department of Oceanography and Coastal Sciences, School of the Coast and Environment, Louisiana State University, Baton Rouge, LA 70803, USA;

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  • 正文语种 eng
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  • 关键词

    in situ measurements; hurricane storm surges; tidal passes; lake pontchartrain; hurricane gustav; hurricane ike;

    机译：原位测量;飓风风暴潮;潮汐蓬查特雷恩湖;古斯塔夫飓风飓风艾克;

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