Influence of the South-North Water Diversion Project and the mitigation projects on the water quality of Han River.
Influence of the South-North Water Diversion Project and the mitigation projects on the water quality of Han River.
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DOI：
10.1016/j.scitotenv.2008.08.008
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发表时间：
2008-11
期刊：
影响因子：
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通讯作者：
Y. Zhu;Hongen Zhang;Lei Chen;Jing Zhao
中科院分区：
文献类型：
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作者：
Y. Zhu;Hongen Zhang;Lei Chen;Jing Zhao
汉江流域位于中国中部，社会经济发展迅速，一些人为干预即将到来，将对流域水环境产生深远影响。应用由降雨径流模型(NAM)、非点源负荷评价模型(LOAD)、水动力模型(MIK11 HD)和水质模型(Ecolab)组成的MICE11模型系统，研究了南水北调中线工程对汉江的影响以及南水北调中线22座污水处理厂(WWTP)和长江汉水调水工程两项缓解工程的效果。研究得出的结论是，一切照旧将导致汉江水质持续快速恶化。2010年南水北调中线工程的实施将带来灾难性的后果，中下游地区的污染水平将显著上升，藻类爆发的风险也将很高。拟建的污水处理厂只会将河段的污染水平降低约10%，而长江汉水引水工程可以显著改善下游200公里河段的水质。预测结果表明，襄樊市至潜江市中游地区未来将出现严重的水质问题。2030年南水北调工程(二期)的实施将进一步加剧这一问题。为了有效地改善汉江水质，建议在拟建的污水处理厂中采用除氮工艺，并有效控制非点源污染负荷，特别是来自上游河南省的污染负荷。
Situated in the central part of China, the Han River Basin is undergoing rapid social and economic development with some human interventions to be made soon which will profoundly influence the water environment of the basin. The integrated MIKE 11 model system comprising of a rainfall-runoff model (NAM), a non-point load evaluation model (LOAD), a hydrodynamic model (MIKE 11 HD) and a water quality model (ECOLab) was applied to investigate the impact of the Middle Route of the South–North Water Diversion Project on the Han River and the effectiveness of the 2 proposed mitigation projects, the 22 wastewater treatment plants (WWTPs) and the Yangtze–Han Water Diversion Project. The study concludes that business as usual will lead to a continuing rapid deterioration of the water quality of the Han River. Implementation of the Middle Route of the South–North Water Diversion Project in 2010 will bring disastrous consequence in the form of the remarkably elevated pollution level and high risk of algae bloom in the middle and lower reaches. The proposed WWTPs will merely lower the pollution level in the reach by around 10%, while the Yangtze–Han Water Diversion Project can significantly improve the water quality in the downstream 200-km reach. The results reveal that serious water quality problem will emerge in the middle reach between Xiangfan and Qianjiang in the future. Implementation of the South–North Water Diversion Project (phase II) in 2030 will further exacerbate the problem. In order to effectively improve the water quality of the Han River, it is suggested that nutrient removal processes should be adopted in the proposed WWTPs, and the pollution load from the non-point sources, especially the load from the upstream Henan Province, should be effectively controlled.