In situ measurements of saltwater flux through tidal passes of Lake Pontchartrain estuary by Hurricanes Gustav and Ike in September 2008
In situ measurements of saltwater flux through tidal passes of Lake Pontchartrain estuary by Hurricanes Gustav and Ike in September 2008
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DOI：
10.1029/2009gl039802
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发表时间：
2009-10
影响因子：
5.2
通讯作者：
Chunyan Li;E. Weeks;J. L. Rego
中科院分区：
文献类型：
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作者：
Chunyan Li;E. Weeks;J. L. Rego
风暴潮通过多个进水口引起的咸水流量从未被记录在案。本文报道了2008年9月头两周连续两次风暴潮冲击路易斯安那州庞恰特雷恩湖河口时，通过主要潮汐通道的盐水通量的现场测量。内流盐分通量主峰持续1.9天，外流盐分通量主峰持续8天以上。通过北航道的盐通量接近200吨/秒，通过南航道的盐通量达到16吨/秒。在古斯塔夫期间，盐分的外流通量在后退阶段达到了1600多万吨，是流入该湖的盐通量的两倍多。显然，没有测量的陆上洪水导致了对盐分流入的这种有偏见的估计。然而，飓风艾克并没有在盐的流入和流出方面造成如此显著的差异。
Storm surge induced saltwater flux through multiple inlets has never been documented. This article reports in situ measurements of saltwater flux through major tidal passes by two consecutive storm surges impacting Lake Pontchartrain estuary in Louisiana during the first two weeks in September 2008. The main peak of inward saltwater flux lasted for 1.9 days during the flood, followed by more than 8 days of outward salt flux. The salt flux rate reached close to 200 tons/sec through the northern channel and 16 tons/sec through the southern channel. Outward flux of salt during Gustav amounted to more than 16 million tons during the receding stage, more than twice of that measured for the flux into the lake. Apparently, overland inundation, which was not measured, caused this biased estimate of influx of salt. Hurricane Ike, however, did not cause such a dramatic difference in influx and outflux of salt.