鸭绿江中上游水域水质理化特征分析

Physical and Chemical Characteristics of Water in the Middle and Upper Reaches of Yalu River

目的通过对鸭绿江中上游水的监测、分析、统计、评价,研究该水域水质理化特征和季节变化动态。方法按环境保护总局HJ/T 52-1999《水质河流采样技术指导》采集水样,按GB/T 5750-2006《生活饮用水标准检验方法》进行检测。结果鸭绿江水域基本处于良好状态,pH值在7.0~8.11之间,水质略偏碱性。硝酸盐氮含量差异较大,三道沟含量最高（平均2.10 mg/L）,砬子河最低（平均0.28 mg/L）。结论该水属钙型软水,经净化消毒处理后,可以作为人类生活饮用水水源及珍稀水生生物栖息地。

Objective To study the physical and chemical characteristics of water quality in the middle and upper reaches of Yalu River and its seasonal dynamics.Methods Based on HJ/T 52-1999 Water Quality-Guidance on Sampling Techniques of Rivers,and GB/T 5750-2006 Standard Examination Methods for Drinking Water,water samples were collected and detected.Results The water of Yalu River was basically in good condition,pH value was 7.0-8.11.Nitrate nitrogen content had large differences in La ditch county（the average content of 2.10 mg / L） and Wei Shahe county（the average content of 0.28 mg / L）.Conclusion The water in the middle and upper reaches of Yalu River is calcium-based soft water.After purification and disinfection treatment,it can be used as source of drinking water and habitat for rare aquatic animals.