【摘要】 针对西安市饮用水中铁含量的变化规律建立了时间序列模型,分析了近几年该市水源水、出厂水、管网水中铁含量在整个供水系统中演变的时空变化规律,结果显示该市饮用水中铁含量具有明显的周期性、季节性和不稳定性的变化特点。在模型建立的基础上,按其变化规律预测了将来可能发生的延续及变化,诊断结果令人满意,拟合结果相关性可高达0.7以上,预测精确度也可达到0.862。确定了该市饮用水铁超标主要是由于原水水质污染、不完善的水处理工艺和长距离的原水输送造成的。更多还原

【Abstract】 A time series model was set up based on the variation of iron content in Xi’an drinking water system,and space-time variation of iron content in source water,treated water and network water in the whole water supply system were analyzed.The results indicated that the iron content in the drinking water system had the features of periodicity,seasonal and instability.Based on the model,possible continuity and change according to the variation rules were predicted.The satisfied results were obtained with relativity of fitting more than 0.7,accuracy of prediction about 0.862.Pollution of raw water,imperfect water treatment process and long distance raw water distribution would be the main reasons of excessive iron content in drinking water.更多还原