【摘要】 基于葫芦河静宁、秦安水文站数据以及实测断面数据,采用分析借用法、二断面实测法以及经验公式法分析了葫芦河中上游静宁、庄浪工业、农业用水区(属于二级水功能区)的综合降解系数,确定该区的水质模型.结果表明,葫芦河流域静宁水文站-高家峡段化学需氧量和氨氮降解系数分别为0.22和0.17/d,相比其他河流较小;常规水质监测表明, 2018年葫芦河经过专项治理,水质得到显著改善,基本满足Ⅲ类水质标准,葫芦河2018年枯水期降解性能较差可能受流量、流速较小的限制;通过对模型参数(设计流量、流速等)的分析确定了河段污染物枯水期的一维水质模型.更多还原

【Abstract】 Based on the data from Hulu River Jingning and Qin’an hydrological station and the measured section data, a comprehensive degradation coefficient of Jingning, Zhuanglang industrial and agricultural water use area in the upper and middle reaches of the Hulu River（belonging to the secondary water function area） was analyzed via the methods of analysis and borrowing, two-section measurement and empirical formula, and the qualitative model in this area was further determined. The results showed that the degradation coefficients of chemical oxygen demand and NH₃-N in the Jingning Hydrological StationGaojiaxia section of the Hulu River Basin were 0.22 and 0.17/d, respectively, smaller than those of other rivers. Routine water quality monitoring showed that the water quality of the Hulu River has been significantly improved after special treatment in 2018, basically meeting the water quality standards of class Ⅲ,but its discharge and flow rate were relatively small. The poor degradation performance of the river in the dry season in 2018 might have been limited by the flow rate and velocity. Through an analysis and study of model parameters（design flow rate, design flow rate, etc.）, a one-dimensional water quality model of pollutant in the dry season of the Hulu River was finally determined.更多还原