长春南湖水体富营养化治理效果分析

Analysis of Control Results of Water Eutrophication in Nanhu Lake of Changchun

通过对南湖水质污染现状评价与历史追溯,判断长时期的生态治理与近年来的挖泥清污工作对4个代表区域水质的改善效果。选择能够代表水质污染特点的典型指标——BOD5、CODCr、TN、TP、透明度5项因子,对南湖1988年、1999年和2001年水质状况进行了综合比较。结果表明,南湖水质近年来有所改善,长时期的生态治理对南湖水质改善作用功不可没;近年来的挖泥清污工作使各区域水质亦有改善,但效果不如生态治理。为了达到最优控制效果,挖泥清污工作应继续进行,并应引进新的水源。

Nanhu Lake of Changchun is a phosphorus - control - plankton engineering was conducted for eutrophication control to Nanhu Lake of dredging Changc respond style Lake. An ecological hun in 1997. After that, sediment work was also conducted for eutrophication control in 2001. For assess the effects of the long - term ecology treatment and the recent years dredging work, five factors of including BOD5, CODCr, nitrogen, phosphorus, and the transparency were chosen to analyze and evaluate the water quality situation to Nanhu Lake in 1988, 1999, and 2001. The results showed that the water quality of Nanhu Lake had the improvement in recent years, the long - term ecology treatment had been lasting achievements to the Nanhu Lake water quality improvement function; in the recent years dredging work also had the improvement the degree was inferior to the ecology treatment, the dredging work should to various regions water quality, but continue to carry on.