摘要
农村生活污水的随意排放已成为流域水质恶化的主要原因之一,准确估算流域农村生活污水氮磷排放量可为污染控制管理提供重要依据.本文对村庄汇水区定点水质监测分析,在了解生活污水水质特性与排污特征的同时,获取生活污水氮磷的人均排放负荷,从而定量估算九龙江流域农村生活污水营养盐污染负荷.研究结果表明,生活污水中总氮、总磷等水质指标浓度均很高,且浓度变化基本反映了居民的生活方式及作息规律.研究区人均排放量为总氮1.562kg/a,总磷0.153kg/a.九龙江全流域生活污水排放负荷为总氮5920t/a、总磷578t/a,分别占全流域农业非点源污染排放量的28%、25%.经济发达、人口集中的沿江两岸地区的氮磷排放负荷较大,应重点控制管理.
Non-point source pollutants such as excess nitrogen and phosphorus originated from household wastewater transport to nearby water body and eventually to estuary,this contributes significantly to eutrophication.A study was conducted to assess the household wastewater quality and give a reliable estimate of household wastewater loads from Jiulong River watershed,with a drainage area of about 141 000 km^2,and a population of 3.8 million distributing mainly in countryside.Prior to this assessment and estimate,two separate day's series of samples were collected at a specific village drainage outlet.All samples were analyzed for total nitrogen(TN),nitrate nitrogen,ammonia nitrogen,total phosphorus(TP),dissolve reactive phosphorus(DRP).The results indicate that the household wastewater has a high nutrient concentration with a day average of above 18.2 mg/L,10.6 mg/L,1.34 mg/L for TN,NH_3-N,TP,respectively.The concentration changes responds to resident's work-rest pattern.Annual TN and TP loads of 5 920 ton and 578 ton from the Jiulong River watershed were estimated based on a discharge coefficient of 1.562 kg/a·capita,0.153 kg/a·capita,respectively.There is a high nutrient load in region with high population density.More attention should be paid on these areas when develop the watershed control program in the future.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第B08期249-253,共5页
Journal of Xiamen University：Natural Science
基金
福建省重大科技攻关项目(2002H009)资助
