底泥对河流的二次污染浅析

On contribution of sediment to secondary pollution of river

根据底泥中污染物质累积和释放过程和底泥对河流二次污染的机理，运用适用的模式和苏州河的实测资料，可得到二次污染ＢＯＤ和ＣＯＤ的年释放量，以及增加上覆河水的ＢＯＤ和ＣＯＤ度。由此认为，对于底泥污染严重的河流，疏浚是必不可少的，其目的在于清除或隔绝黑色富集层对上覆河水的二次污染。

According to the investigation of river sediment polluted materials depositing and releasing courses and the mechanism of river sediment secondary pollution, a suitable mathematics model and observed data of Suzhou Creek in Shanghai were used to gain annual amount and concentration of COD and BOD in the water of river. As a result, the dredge was suggested to be ues to serious polluted river so that the most serious polluted layer could be apart from upper water of river.