中文摘要：

为揭示不同水文条件及污染源的动态变化对污染物降解系数的影响,本研究以黄河龙门至三门峡河段为研究对象,对河流污染物降解系数的动态特征进行分析研究。以枯水年为代表水文年,根据黄河龙门至三门峡区间各河段的实测资料,用基于Matlab回归分析的参数估计方法反算出各河段不同水文条件下的CODcr和NH3-N的综合降解系数,通过实例模拟对计算结果进行检验和验证。研究结果表明,不同水文条件下采用不同的污染物综合降解系数更符合河流污染物降解的实际情况。

英文摘要：

In order to revealing the effect of different hydrological conditions and dynamic changes of the pollution sources upon the degradation coefficient and at the same time to protect the safety of water resources,the paper analyzes the dynamic characteristics of river degradation coefficient by means of numerical simulation methods.With the dry year as the representative hydrological year,according to the real measure data of river section from Longmen to Sanmenxia section of the Yellow River,based on the parameter estimation method of Matlab Regression analysis,the CODcr and NH3-N comprehensive degradation coefficient of each river section was retrieved in the different hydrological conditions,and the calculated results are verified by example simulation.The results show that using the different comprehensive degradation coefficient in the different hydrological conditions more accords with actual conditions of the river pollutant degradation.