松花江哈尔滨城区段汇入支流水质污染评价及影响因素分析

为了解松花江哈尔滨城区段汇入支流水质污染现状,以一级支流发生渠、马家沟、何家沟和运粮河为研究对象,监测分析枯水期、丰水期DO、CODcr、BOD5、TP和TN等主要水质,应用单因子水质标识指数法和综合水质标识指数法评价研究区域水质污染状况,揭示水质指标时空分布特征,分析其主要影响因素。结果表明,研究区域污染较严重,约76.0%监测断面水质类别为Ⅴ类及以上,47.9%监测断面水质类别为劣Ⅴ类及以上;时空分布差异性明显,水体污染程度枯水期丰水期,其中发生渠、马家沟、何家沟污染情况体现为中、上游下游,运粮河污染情况体现为中游上游和下游,主要影响因素是工业废水、集中式排污口的污水排放、农田径流。研究结果为松花江哈尔滨城区段河流管理、城市生态环境治理与保护提供科学依据。

Pollution assessment and influence factors of water quality of tributaries in Harbin urban of the Songhua River

In order to understand the water pollution situation of tributary in Harbin urban of Songhua River,water quality index (DO CODcr BOD5 TP TN) of surface water in dry season and wet season from Fasheng River,Majia River,Hejia River and Yunliang River were collected.Study temporal-spatial distribution of water quality index and evaluate water pollution situation by the single factor pollution index method and integrated pollution index method,and the main affecting factors were analyzed.The research results showed that the pollution of the tributaries in Harbin City was relatively serious,about 76.0％ of the monitoring cross section water quality categories were V categories and above,and about 47.9％ of the monitoring cross section water quality categories were inferior V categories and above.Temporal-spatial distribution was obvious,which was reflected dry season＞wet season,which was reflected middle and downstream＞upstream of Fasheng River,Majia River,Hejia River,which was reflected middle＞downstream and upstream of Yunliang River.The main influence factors was the outlet of sewage from factory,and agricultural runoff.The results would provide scientific basis for river management,urban ecological environment management and protection the section of Harbin City of Songhua River.