摘要
底泥污染是造成茅洲河流域水质黑臭的关键因素之一。本文通过对底泥勘查取样检测,采用底泥沉积物单因子污染指数法对底泥营养盐污染进行分析评价,结果显示,营养盐、有机质污染均达到了重度污染等级。采用单一重金属潜在生态风险系数和多金属潜在生态风险系数法对重金属污染程度进行分析评价,结果显示,重金属污染达到了极强生态风险等级。根据底泥污染程度的不同,结合垂向变化分析,确定了不同区域底泥达标清淤深度在0.7~2.5m之间,继而确定了清淤量为331万m^(3),为茅洲河流域污染底泥清淤提供了可靠依据。其研究路线、方法可为类似工程参考。
Sediment pollution is one of the key factors causing black and smelly water quality in Maozhou River Basin. In this paper, through the investigation and sampling of sediment, the single factor pollution index method of sediment is used to analyze and evaluate the nutrient pollution of sediment. The results show that the pollution of nutrient and organic matter has reached the level of severe pollution.The single potential ecological risk coefficient of heavy metals and the potential ecological risk coefficient of multiple metals were used to analyze and evaluate the degree of heavy metal pollution. The results showed that heavy metal pollution reached a very strong ecological risk level.According to the different degree of sediment pollution, combined with the analysis of vertical variation, it is determined that the standard dredging depth of sediment in different regions is between 0.7 and 2.5 m, and then the dredging amount is 3.31 million m^(3), which provides a reliable basis for dredging polluted sediment in Maozhou River Basin. The research route and method can be a reference for similar projects.
作者
路文典
龚浩
徐超
LU Wendian;GONG Hao;XU Chao(Powerchina Eco-environmental Group Co.,Ltd.,Shenzhen 518101,China)
出处
《水资源开发与管理》
2022年第3期43-49,共7页
Water Resources Development and Management
关键词
茅洲河
底泥
污染分析
技术路线
达标清淤量
Maozhou River
sediment
analysis of pollution
technical route
dredging quantity up to standard
