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Monitoring and Prediction of Tributyltin in the Elizabeth River and Hampton Roads, Virginia

机译：弗吉尼亚伊丽莎白河和汉普顿路的三丁基锡的监测和预测

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Tributyltin (TBT) concentrations were measured in the Elizabeth River and Hampton Roads regions of Virginia 13 times at 9 stations over a 21-month period. Concentrations of TBT were highly variable over the study period suggesting intermittent kilogram cfaantity inputs from commercial drydocks or other sources. In general, concentrations were low in the Hampton Roads/Naval Station area (<10 ng TBT/l), increasing up-river to maximum levels in the vicinity of a commercial shipyard and then decreasing further up-river. Highest levels were observed during December, 1985 (mean river concentration of 87 ng/l), while lowest values were observed in June, 1986 (mean TBT concentration 2 ng/l). Dynamic Estuary Model (DEM) results predict TBT concentrations at/or below 1 ng/l in Hampton Roads and generally less than 25 ng/l in the Elizabeth River based on estimated TBT releases from hulls and drydocks in the vicinity of Hampton Roads and Elizabeth River. These are generally consistent with measured concentrations. Intermittent higher concentrations in the Elizabeth River suggest that improved commercial drydock cleanup procedures would reduce the flux of TBT into the estuary.
机译：在21个月的期间内，在弗吉尼亚州的伊丽莎白河和汉普顿路地区的9个站点进行了13次三丁基锡（TBT）浓度的测量。在研究期间，三丁基锡化合物的浓度变化很大，这表明来自商业干船坞或其他来源的间歇性公斤清水投入。通常，汉普顿公路/海军基地区域的浓度较低（<10 ng TBT / l），在商业造船厂附近使上游河道上升到最大水平，然后进一步下降上游河道。 1985年12月观测到最高水平（河流平均浓度为87 ng / l），而1986年6月观测到最低水平（平均TBT浓度为2 ng / l）。动态河口模型（DEM）结果基于汉普顿路和伊丽莎白附近船体和干船坞的估计TBT释放量，预测汉普顿路的TBT浓度为/或低于1 ng / l，伊丽莎白河中的浓度通常低于25 ng / l河。这些通常与测得的浓度一致。伊丽莎白河中间歇性的较高浓度表明改进的商业干船坞清洁程序将减少三丁基锡化合物流入河口的流量。

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