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| Risk Assessment and Genetic Characteristics of Water Pollution of the Yellow River at Huhhot, China |
| Received:January 27, 2015 |
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| KeyWord:Yellow River;section;water pollution risk;index;assessment |
| Author Name | Affiliation | E-mail | | FENG Li-zhong | College of Water Resources and Civil Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China | | | PEI Guo-xia | College of Water Resources and Civil Engineering, Inner Mongolia Agricultural University, Huhhot 010018, China | peiguoxia@126.com | | LÜ Xin-ge | Autonomous Region Environmental Science Research Institute, Inner Mongolia, Huhhot 010010, China | | | ZHANG Kun | Autonomous Region Environmental Science Research Institute, Inner Mongolia, Huhhot 010010, China | | | WANG Chao | Autonomous Region Environmental Science Research Institute, Inner Mongolia, Huhhot 010010, China | |
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| Abstract: |
| The Yellow River at Huhhot has suffered from industrial and agricultural pollution. Here we adopted the existing Chinese environmental standards and water pollution indexes to perform risk assessment of this water body. Eco-systems and human health index were taken as receptors. Risk assessment model and risk grades were applied to temporal and spatial risk assessments of water pollution based on the water quality data of different sections, different time and different indexes of the Yellow River, Huhhot from the year 2011 to 2013. The results were also compared by using risk index assessment method, probabilistic risk assessment method, and genetic mutation caused by accident model assessment based on the key pollutant monitoring data. Water pollution risk did not show obvious temporal and spatial distributions, but had a strong localization, contingency and variability. The temporal and spatial variation of water pollution risk values were 5.71~7.28, 1.94~17.58;1.37~1.60, 0.21~1.72; 1.30~0.87, 0.68~3.18; 1.18~1.44, 0.68~0.86 for conventional index, metal index, organic compound index, and anion and salt index, respectively. High wastewater discharge at the sections of Hunjinqiao and Xiaoruhuangkou in which the concentrations of BOD, COD and TN were comparatively high led to a highly risk of conventional index in both the main stream and the related tributaries. However, other 3 indexes were at a low or below risk levels. Overall, the risk degree was greater in the tributaries than in the main stream. |
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