闽江福州段支流污染负荷研究

借助地理信息系统对闽江福州段进行流域划分，通过污染源数据的调查和分析，在流域层面上进行了污染负荷研究．研究以COD、NH3-N为主要指标，计算各子流域污染负荷，并确定其主要来源和比例关系．结果表明：闽江流域福州段COD入河总量为9371．75t，NH3-N入河总量为992．63t，工业源与城镇生活源是主要污染源．市区内河是污染最严重的子流域，COD、NH3-N的入河量占流域总负荷的34。4％与61．3％．市区内河、闽江干流北港段、磨溪等流域水体受到各种点源污染的影响，而梅溪干流、大樟溪干流等流域水体则主要受到非点源污染的影响．

Study on the Pollution Load of Minjiang River in Fuzhou Section

With the help of GIS and based on the investigation and analysis of the pollution sources, a study of pollution load of Minjiang River in Fuzhou section over the watershed scale was carried out. The assessment of pollution load was mainly based on COD and NH3 - N index, by which the pollution sources and ratios were determined. Results indicated that in the study section, 9 371.75 t COD and 992. 63 t NH3 -N were discharged into Minjiang River, mainly came from industrial sources and ur- ban life. The most polluted watershed was inland rivers in Fuzhou City which accounted for 34. 4% of COD discharge and 61.3% of NH3 - N discharge. Point source pollution was the main pollution source in inland rivers, and in the north branch of Minjiang River and Moxi river, non-point source pollution was the main pollution source in the main stream of Meixi River as well as in the main stream of Dazhangxi River .