平原河网地区农村生活污染入河机制

Mechanism of Rural Domestic Pollution Flowing Into Rivers in Plain River Network Area

以太滆运河流域前黄镇和雪堰镇为研究区,设计"农村生活非点源污染调查问卷",采用随机抽样的方法,调查了39个行政村中85个自然村的农村生活污染情况。通过对问卷的统计分析得到了厕所使用类型的比例、化粪池中上清液和固体残渣的去向以及生活垃圾处置等信息。在对农村生活污染进行分类的基础上,估算出该地区农村生活污染入河系数为:CODCr,6.6%～13.3%;TN,18.1%～18.6%;TP,8.2%～12.5%。

A questionnaire about rural domestic non-point source pollution was designed and used during the investigation of 85 natural villages in Qianhuang and Xueyan Towns of the Taige Canal Watershed by means of random sampling.Through statistic analysis of the feedback in the questionnaires,information about ratio of different types of toilets,and fate of the supernatant and solid residue in the septic-tank,and disposal of domestic waste were obtained and summarized.Based on the classification of rural domestic pollutions,coefficients of the pollution flowing into the river were estimated as follows：CODCr 6.6%-13.3%;TN 18.1%-18.6%;and TP 8.2%-12.5%.