中文摘要：

通过调查第二松花江10个典型断面沉积物、江水中总汞及江水中不同形态的汞浓度,研究了建坝对于库区汞污染的影响。建坝之后,由于水文条件改变,悬移质发生沉降,库区沉积物中汞浓度将会增加,库区会变成汞的汇。库区下游出水处江水汞浓度将降低至0.032μg/L。每年通过推移质输沙向库区输入约4.37 kg汞,通过悬移质输沙向库区输入约856.8 kg汞。由于输沙的影响,每年将会在库区形成厚约1.23 cm的沉积物。库区上游沉积物的再悬浮、水库淹没区汞的溶出,对库区汞通量影响不大。

英文摘要：

With economic development,a dam will be built on the Hadashan,which was on the downstream of the Second Songhua River.The total mercury contents in sediments,those in water and the different mercury contents in water of ten sample sites were investigated in order to discuss the impact of the dam on the mercury pollution of the reservoir which would form after the dam was finished.It showed that the suspend particles would deposit resulted from the hydrological conditions changed,which led to the rise of total mercury contents in the reservoir formed by the dam.In the reservoir,the mercury would be sunk.Total mercury contents in water of the drainage site of the reservoir would reduce to 0.032μg/L.The reservoir would be imported in 4.37 kg mercury in the processed particles and 856.8kg mercury in the suspend particles every year.About 1.23cm depth of sediment would be formed by the bedload transported by water in the bottom of the reservoir.The total mercury of re-suspend particles in the upstream of the reservoir and the released mercury in the submerge area have no significantly impact on the mercury pollution of the reservoir.