京杭运河杭州段水污染源特征与截污措施建议

The pollution sources assessment and interception in Hangzhou section of the Grand Canal

京杭运河杭州段地势低洼,一直是杭州城市和沿线郊区的污水受纳场所。经调查,在城区运河干流沿线两岸的合流管线污染源共有521处,其中生活污染源占95.2％,排入运河主河道污水量21820 m3／d。采用等标污染负荷法评价污染源,得出主要污染源80个,主要污染物为COD、BOD和NH3-N。提出了截污的基本原则和设想。

The Hangzhou section of the famous Grand Canal was highly polluted due to the wastewater discharged from the metropolitan and suburban area of Hangzhou. A program of pollution sources investigation was conducted, 521 combined wastewater outfalls (95.2% of them domestic) with total capacity of 21 820 cubic meters per day were founded. Equivalent standard pollution load method (ESPLM) was applied to assess the sewage resources and 80 sewage sources were ensured as the main pollution sources. The COD, BOD and NH3 - N were illuminated as the main pollution factors of these pollution sources. The sewage interception measure was also proposed in this paper.