填海造地化工园区地下水污染调查及原因分析

Investigation and cause analysis of groundwater pollution in reclamation chemical industry

以北方某填海造地化工园区为例开展研究,对园区16眼地下水监测井进行28个周期的连续跟踪监测。污染物调查结果显示,该区主要污染指标为氨氮,其次为耗氧量和有机物。污染程度分区显示,原地貌区地下水污染程度较轻,回填区污染最重。污染趋势分析结果显示,在采取污水管网检漏修补等断源措施后,地下水水质污染存在向好或稳定趋势。污染原因分析显示,地层的不均匀沉降导致的管网污水渗漏,以及回填区历史上鱼虾养殖活动造成的底泥污染,是导致回填区地下水污染严重的主要原因。

Taking a chemical industrial park reclaimed from the sea in the north as an example,the study was carried out,this research carry out the continuous monitored for 28 cycles on the 16 groundwater monitoring wells. The pollutant survey results show that the main pollution in this area is ammonia nitrogen,followed by oxygen consumption and organic matter. It is showed that the groundwater pollution degree is relatively light in the original landform area while serious in the backfill area.Pollution trend analysis showed that the groundwater pollution has a trend of improvement or stability after taking the leakage detection and repairing of the sewage pipe network and other measures to cut off the source. The sewage leakage of the pipe network caused by the uneven settlement of the backfill area and the sediment pollution caused by fish and shrimp farming activities in the backfill area are the main reasons for the groundwater pollution in the backfill area.