[关键词]
[摘要]
5地表水环境质量标准6 ( GB 3838- 2002) 是当前南水北调中线水质监测评价的主要依据, 但是该标准中部分 指标与5生活饮用水卫生标准6 ( GB 5749- 2006) 和5城市供水水质标准6 ( CJ/ T 206- 2005) 不衔接, 导致供水和用水 双方的水质信息无法充分共享。通过对比 3 部标准中水质指标和浓度限值的异同, 结合南水北调中线水质特征, 从 水质标准衔接和水质从严管控的角度, 初步拟定了南水北调中线输水水质标准, 即以5地表水环境质量标准6 ( GB 3838- 2002) 为基础, 提出将氨氮和粪大肠菌群等 21 项指标浓度限值调低, 继续保留 pH 等 87 项指标的浓度 限值, 明确基本项目中总氮指标的浓度限值为 2 mg/ L, 增加浑浊度、叶绿素 a 和藻密度 3 项指标。
[Key word]
[Abstract]
"Environmental quality st andards fo r surface water" ( GB 383822002) is the main basis for the monito ring and ev alua2 tion of curr ent water qualit y for M iddle Ro ut e o f So ut h2to2Nort h Water Tr ansfer Pro ject, but some o f the indicato rs in t his standard are no t co nnected w ith " Standards fo r drinking water quality "( GB 574922006) and "Water Quality Standa rd fo r Urban Water Supply" ( GB 574922006) . The w ater quality info rmation o f t he w ater supplier and the water user canno t be fully shar ed. By comparing the similarities and differences of the w ater quality indicators and the co ncentration limits amo ng t he three stand2 ar ds, and combined w ith t he water qua lity char acteristics of the Middle Route of South2 to2North Water Tr ansfer Project , the water qualit y standard o f the pr oject w as formulated fr om the perspective o f w ater quality standar d connectio n and strict contr ol of w ater quality. Based on the "Env iro nmental qualit y standar ds for surface w ater" ( GB 383822002) , t he co ncentration limits of 21 indicato rs such as ammonia nitro gen and fecal colifo rms were r educed, the concentr ation limits o f 8 indicat ors such as pH ar e retained, the co ncentrat ion limits of to tal nitro gen index w as co nfirmed as 2 mg/ L, and tur bidity, chloro phy ll2a, alg ae density three indicato rs w ere supplemented.
[中图分类号]
[基金项目]
水体污染控制与治理科技重大专项( 2017ZX071082001)