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摘要: 为了解海河水系水污染防治重点区域永定河怀来段污染特征,于2016年11月—2017年10月进行了为期一年的监测。选择6个采样点的6项监测指标,阐述河流氮、磷的时空变化特征,并采用氮磷比和对数型幂函数普适指数公式法分析水体氮、磷营养盐结构时空变化规律,评估水体富营养化程度,解析富营养化风险。结果表明:永定河怀来段水体污染较为严重,其中TN浓度超过《国家环境保护标准“十三五”发展规划》中地表水环境功能区划分Ⅲ类水体浓度限值的13.25倍,有机氨(ON)和NAbstract: In order to understand the pollution characteristics of the Huailai section of the Yongding River, which is the key water pollution prevention and control area of the Haihe river system, the water quality monitoring was performed for a period of 1 years from November 2016 to October 2017. Six sampling points with 6 monitoring indicators were selected to expound the temporal and spatial variation characteristics of nitrogen and phosphorus in the river. The N/P ratio and the universal index formula using logarithmic power function were used to analyze the temporal and spatial variations of nutrient structure of nitrogen and phosphorus in water, assess the degree of eutrophication, and analyze the eutrophication risk. The results show that the water pollution in the Huailai section of the Yongding River is comparatively serious. TN is 13.25 times over the Class Ⅲ concentration limit of the surface water environment function area. The ON and N
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Key words:
- Yongding River /
- nitrogen /
- phosphorus /
- eutrophication /
- risk assessment
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