The seasonal Kendall method is a research approach which is widely used in the field of analyzing water quality tendency.Selected Shenwo reservoir as the study area,the trend of water quality change and its reason are numerically studied by using seasonal Kendall method.It is found that the concentration of DO, COD and TP have no obvious increasing or decreasing trend but the concentration of ammonia nitrogen has a significant increasing trend.Additionally, through analyzing the trend of flow control concentration,it is found that the water quality of Shenwo reservoir is mainly affected by the pollutant discharge of urban life and bottom sludge,while river flow has relatively low impact on water quality.%季节性Kendall检验法是一种广泛应用于流域水质趋势分析的研究手段.以太子河干流主要控制性水利工程——葠窝水库为研究对象,通过构建Kendall检验模型对库区水质变化趋势及影响因素进行研究,为水库水环境综合整治提供科学依据.研究结果表明,库区溶解氧、化学需氧量及总磷浓度在研究时间段内未出现明显升降趋势,而氨氮浓度则呈显著上升趋势.此外,对流量调节后的各指标浓度变化趋势分析可知,葠窝水库水质主要受流域周边地区生活生产废水排放、库区底泥污染物释放等污染源因素影响,河水流量因素对其影响相对较小.
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