Effects of Hurricanes Katrina and Rita on the chemistry of bottom sediments in Lake Pontchartrain, Louisiana, U.S.A.
Effects of Hurricanes Katrina and Rita on the chemistry of bottom sediments in Lake Pontchartrain, Louisiana, U.S.A.
复制标题
卡特里娜飓风和丽塔飓风对美国路易斯安那州庞恰特雷恩湖底部沉积物化学的影响
DOI：
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发表时间：
2006
影响因子：
11.4
通讯作者：
S. Zaugg
中科院分区：
文献类型：
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作者：
P. V. Van Metre;A. Horowitz;B. Mahler;W. T. Foreman;C. Fuller;M. Burkhardt;K. A. Elrick;E. Furlong;S. C. Skrobialowski;James J. Smith;Jennifer T. Wilson;S. Zaugg
卡特里娜飓风和丽塔飓风以及随后路易斯安那州新奥尔良的停水对庞恰特雷恩湖沉积物化学的影响通过对街道泥和悬浮物和底部沉积物样本的化学分析进行了评估。底部沉积物中与城市有关的元素和化合物（如Pb、Zn、多环芳烃和氯丹）的最高浓度超过了美国城市湖泊和沉积物质量指南的中位数浓度。然而，浓度升高的范围很有限，在距离17街运河口几百米的范围内，这与历史评估的结果相似。飓风丽塔前后样品的化学和放射性核素分析表明，湖流和风暴对近岸沉积物的再动员是一个持续的过程。卡特里娜飓风和丽塔飓风对庞恰特雷恩湖沉积物化学的影响在空间上是有限的，而且很可能是短暂的。
The effects of Hurricanes Katrina and Rita and the subsequent unwatering of New Orleans, Louisiana, on the sediment chemistry of Lake Pontchartrain were evaluated by chemical analysis of samples of street mud and suspended and bottom sediments. The highest concentrations of urban-related elements and compounds (e.g., Pb, Zn, polycyclic aromatic hydrocarbons, and chlordane) in bottom sediments exceeded median concentrations in U.S. urban lakes and sediment-quality guidelines. The extent of the elevated concentrations was limited, however, to within a few hundred meters of the mouth of the 17th Street Canal, similar to results of historical assessments. Chemical and radionuclide analysis of pre- and post-Hurricane Rita samples indicates that remobilization of near-shore sediment by lake currents and storms is an ongoing process. The effects of Hurricanes Katrina and Rita on the sediment chemistry of Lake Pontchartrain are limited spatially and are most likely transitory.