[目的]研究溶解氧对地表饮用水源水质中锰、氨氮、总磷的影响.[方法]针对河北省保定市饮用水源地西大洋水库取水口夏季锰和氨氮超标问题,研究了溶解氧对库区水质中锰、氨氮、总磷的影响.[结果]水体中溶解氧浓度偏低促使底质中元素的释放是影响地表饮用水源地夏季水体锰和氨氮超标的原因之一.自2003年保定市全面取缔库区的网箱养鱼之后,库区水质得到明显改善.[结论]该研究为改善饮用水源地水库水质提供了参考.%[Objective] The research aimed to study influence of the dissolved oxygen on Mn, NH3-N and TP in surface drinking water source. [Method] For Mn and NH3-N overproof problem in water intaking of Xidayang Reservoir in summer, influence of the dissolved oxygen on Mn, NH3-N and TP in the reservoir was studied. [Result] Low dissolved oxygen concentration promoted element release of the substrate, which was one of reasons for Mn and NH3-N overproof problem in surface drinking water source in summer. Since cage fish culture was prohibited in the reservoir in 2003 , water quality was improved obviously. [ Conclusion] The research provided reference for improving water quality in surface drinking water source.
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