论文部分内容阅读
以水质一维流方程为基础,建立了水源地区非点源污染物入河量计算的反演模型;计算了浙江省湖州市老虎潭水库水源地区各条支流的非点源污染物入河量;并通过对实测水文水质参数的统计,采用Monte Carlo模拟方法,分析了模型各输入参数的敏感性.由于该模型所有敏感参数都可以实测获得,避免了关键参数取值的人为主观因素的影响,保证了非点源污染过程定量分析的客观性;该模型在计算非点源污染物入河量时不受时间的限制,可以根据研究区域的水文水质监测频率计算任意时段内的非点源污染物入河量.结果表明,该水源区所有溪流中的氮、磷污染物负荷量都与溪流流量呈极显著正相关(r>0.90,p<0.01),因此,丰水期是非点源污染物入河的集中期;对输入参数的敏感性分析显示,对模型输出结果影响最大的是溪流的流量,其次是段末浓度和背景浓度,综合降解系数和流速的影响较小.
Based on the one-dimensional flow equation of water quality, an inversion model for calculating non-point source pollutants in the water area was established. The non-point source pollutants in each tributary of the Laohutan reservoir water source area in Huzhou City, Zhejiang Province were calculated. The sensitivity of each input parameter of the model was analyzed by using Monte Carlo simulation method based on the statistics of measured hydrological water quality parameters.As all the sensitive parameters of the model can be measured, the influence of the subjective factors of the key parameters was avoided , Which guarantees the objectivity of quantitative analysis of non-point source pollution process. The model is not limited in time when calculating the inflow of non-point source pollutants into the river, and can calculate the non-point source at any time according to the monitoring frequency of hydrological water quality in the study area The results showed that the load of nitrogen and phosphorus in all the streams in the water source area was significantly and positively correlated with the streamflow (r> 0.90, p <0.01). Therefore, the wet season was a non-point source The concentration of pollutants into the river; analysis of the sensitivity of the input parameters showed that the greatest impact on the output of the model is the flow of streams, followed by the end of the concentration and background concentration, the integrated degradation coefficient and flow The less affected.