黑龙滩水库污染源及水质演变趋势分析

Variation of Water Quality and Trophic State of Reservoir Heilongtan

在黑龙滩水库进行污染源调查及水质分析的基础上,探讨了水库水质和营养盐变化趋势及其主要影响因素.污染源调查结果表明,黑龙滩水库流域CODCr、NH3-N、TN和TP产生量分别为3664.23 t/a、280.37 t/a、335.49 t/a和74.96 t/a,水库污染负荷主要集中在农村面源污染、畜禽养殖污染和旅游污染3个方面,其污染物产生量占总污染负荷的93％以上;水质分析表明,自2006年后,黑龙滩水库水质逐渐好转,但2010后CODMn有上升趋势,2012年主要超标因子为CODMn和TP;2004年～2012年,黑龙滩水库营养状况由贫营养向中营养发展,并在2010年～2012年稳定在中营养状态,水库富营养化整体呈现加剧趋势.

Based on the investigation of pollution source and the analysis on the water quality of Heilongtan Reservoir, this article discussed the variation trend of water quality and its main influence factors. The investigation result showed that the generation amount of pollutants CODcr, ammonia nitrogen, total nitrogen and total phosphorus were 3664. 23 t/a, 280. 37 t/a,335.49 t/a and 74. 96 t/a in Heilongtan Reservoir, and the amount of pollution load was mainly contributed by generated primarily from non - point source pollution, livestock pollution and tourism pollution. The generation amount of these three pollutants accounted for more than 93% of total pollution load. The analysis of water quality showed that the water quality ofHeilongtan Reservoir gradually improved since 2006, with an upward trend of CODMn after 2010. In 2012, the main exceeding standard factors were CODMn and TP. During 2004 to 2012, the trophic status of Heilongtan Reservoir has changed from oligotropher into mesotropher, remaining stable within mesotropher range from 2010 to 2012, and the overall eutrophication of thereservoir showed a trend of aggravation. In the end, this article proposed some countermeasures and suggestions on the basis of analysis conclusion and actual situation of Heilongtan Reservoir.