泗河水质评价与污染源分析

Evaluation of Water Quality and Analysis of Pollution Source of Sihe River

利用2013年10月泗河流域21个断面的水质监测数据,采用平均综合污染指数法,进行河流水质评价、重污染监测点的筛选和污染源的分析。结果表明,泗河所有监测断面平均综合污染指数Pj的平均值为2.9(>2),其中Pj>2的重污染监测断面占76.2%,这些断面TN和TP的单项污染贡献率分别为97.4%和65.8%,说明泗河总体上污染严重,TN和TP主要来自重污染断面;CODMn、TP、TN的单项污染分担率依次为13.1%、18.8%、68.1%,说明泗河首要污染物是TN,其次为TP和CODMn。综合分析表明,流域附近城镇未经处理的生活污水以及工业废水的排放等点源污染是造成流域水质污染的主要原因,农业面源污染应引起重视。

Based on monitoring data of 21 sections of Sihe River in October 2013 ,the average comprehensive pollution index （Pj） was adopted for water quality evaluation,heavy pollution monitoring site selection and pollution source analysis. The results showed that Pj of all monitoring sections was 2.9 （ 〉 2）, among which, the percentage of heavily polluted sections （Pj 〉 2 ） was 76.2%. The average value of individual soiled contribution rates of TN and TP of those sections were 97.4% and 65.8% respectively,indicating that the pollution of Sihe River was still at high level ,TN and TP were mainly from heavily polluted sections. The value of individual soiled share rate of CODMn, TP, TN were 13.1%, 18.8%, 68. 1% respectively,indicating that TN was the primary pollutant of Sihe River, followed by TP and CODMo. Integrated analysis indicted that the point pollution resources such as the discharge of untreated sewage and industrial waste water was still the main influence factors of water quality in Sihe River. Meanwhile, the agricultural non-point pollution resources should be paid more attention.