无锡市太湖新城主干河网水系底质状况的研究

Study on the Sediment Quality of Main River Network in Taihu new town,Wuxi

以2014—2015年无锡市太湖新城主干河网水系底质的检测结果为研究对象,分析了底质中的营养盐及重金属状况,并采用地积累指数法对重金属的污染进行评价。结果表明:新城河网内底质的TP含量2015年已经达到较清洁状态,且各样点差异较小。TN含量与有机质含量变化趋势基本一致,成正相关性,底质中TN负荷略高。新城2015年主干河网重金属的污染状态较2014年整体无明显变化,大多为轻度污染,主要污染项目为Hg。

Based on the test results of the water system base in the main river2014 to 2015, the nutrients and heavy metal conditions in the sediment were analyzed,and the index of geo - accumulationwas used to evaluate the pollution level of heavy metals in sediment. The result indicated that the inthe river network has reached a cleaner state in2015,and the difference between each monitoring change trend of TN content and organic matter content was basically consistent with positive correlation, and the TN in the sed-iment was slightly higher. The pollution status of heavy metals in the main river network of from that in 2014, most of them was light pollution and the main pollution project was Hg.