Abstract:

Variations of water quality and pollutant fluxes of Tuhai,Dehuixin,Majia Rivers during 2003-2010 were analyzed.Results showed that the major standardexceeding pollutants of Tuhai and Dehuixin River were CODCr,CODMn,BOD5,NH3N,and petroleum which showed aerobic pollution and toxic organic pollution.The major standardexceeding pollutants of Majia River were CODCr,CODMn,BOD5,NH3N,petroleum,TP,and VHB,and these water quality indices exceeded the III water quality standard 9,7,12,6,7,9 and 13 times respectively.Majia River showed aerobic pollution,nutrient pollution and toxic organic pollution.For the major standardexceeding pollutants of CODCr,CODMn,BOD5,NH3N,and petroleum,the average concentrations of the five pollutants of Tuhai,Majia,and Dehuixin Rivers were 42,92,5,255,015 mg/L,80,128,7,215,021 mg/L,179,509,50,717,040 mg/L.Among these three rivers,Majia River has been polluted the most severely.During the study period,for these three rivers,the range of aerobic pollution indices were 48-134，62-226，94-1054,respectively.The range of nutrient pollution indices were 03-180，02-18，22-214,respectively.The range of heavy metal pollution indices were 05-09，06-09，05-09,respectively.The inorganic toxic pollution indices were 07-07，07-50，12-20,respectively.The range of organic toxic pollution indices were 20-60，00-64，538-358,respectively.The inorganic and organic toxic pollution indices of Dehuixin River exhibited an increasing trend,while other pollution indices of pollutants in the three studied rivers were decreased,indicating the pollution condition of the three rivers was relieved.Riverine fluxes of pollutants into sea of three rivers showed an increasing trend during 2006-2010,except TN and TP in the Tuhai River.Fluxes of CODCr,CODMn,NH3N,TN,TP,and petroleum in Tuhai,Majia,and Dehuixin Rivers were 73 871,12 963,1 025,26,69,162 t,16 075,2 997,365,304,13,31 t，51 571,10 801,1 738,626,934,140 t,respectively. The order of contribution of pollutant fluxes of three rivers was:Tuhai River>Majia River>Dehuixin River.Although with the development of Haihe River Basin pollution prevention and control,the concentrations of pollutants in three rivers were decreased,but the fluxes of major pollutants into sea were still increasing for the increasing of runoff into sea.The increasing of fluxes into sea would have a bad influence on the near shore water body eutrophication and marine ecosystem.So the water pollution prevention and control of Haihe River Basin were still needed to process.The pollutant amount control was needed to implement on the pollutant load discharged by town life source,industrial source and agriculture source.Besides,the pollutant load should be cut according to the cut aim