厦门筼筜湖纳潮排污能力研究

A study on ability to remove contaminates by tidal flow in Yundang Lake of Xiamen

自 1 971年围垦后 ,厦门港成为内湖 ,没有海水进出交换 ,从而积蓄多种有机污染物和重金属 .但自从 1 984年采取纳潮排污后 ,该湖水质有所改善 .本研究于1 999年主要对湖水质进行调查和评价 .结果显示污染物含量虽然有所降低 ,但仍属于污染状态 .其纳潮排污 ,每天可排放出 :石油烃 40 .8kg ,有机氯农药 0 .0 1 1kg ,铜 4.54kg ,铅 0 .2 84kg ,锌 1 1 .97kg ,镉 0 .3 6kg ,汞 0 .0 1 1kg .由于湖水水质仍未完全改善 ,非常有必要继续进行监测 .

After reclamation in 1971,Yundang Harbour in Xiamen become an inner lake without seawater exchange any more and started to accumulate organic pollutants and heavy metals. The lake water quality started to have some improvement after taking tidal seawater exchange. This study focused on the lake water quality and its assessment. The results from investigation of sediment and water samples showed that the pollutant loading decreased, but still in contamination state. By taking tidal seawater exchange, the pollutants can be removed every day as follows:petroleum hydrocarbons 40.8kg,organic chlorinated pesticides 0.011kg,Cu 4.54kg,Pb 0.284kg,Zn 11.97kg,Cd 0.359kg and Hg 0.011kg. The lake water quality is still not improved completely. So continuoue monitoring is very necessary.