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摘要: 通过底泥疏浚的围隔试验,对疏浚前后水质状况、浮游生物、微生物数量以及水体对生物的毒性进行对比,结果显示,疏浚使水质有所改善,水体中重金属浓度基本处于稳定;对微生物的数量没有太大的不良影响,且可以很快恢复到原来的水平;疏浚后水体的生物毒性降低,表现在疏浚后河水对发光细菌的毒性降低,试验动物死亡率下降,肝体比下降,精子异常发生率下降.因此,苏州河合理的底泥疏浚有利于水生生态系统的恢复.Abstract: This study investigated the effects of dredging on the water quality, the quantity of plankton and microbe, and the toxicity of sediment. The results were as follows: after dredging, the water quality was improved; the concentration of heavy metal in water held the line; the variety of the microbe quantity was not obvious and might be recovered soon; and the toxicity of sediment was relatively weak, it included that the toxicity of sediment for the luminescent bacteria was depressed; the death rate of animal declined; the rate of liver in avoirdupois declined; and the rate of exceptional mouse sperm declined. It is suggested that dredging in Suzhou creek helped for the recovery of the aquatic ecosystem.
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