The Qinhuai water quality in recent years have improved Nanjing agriculturalÂuniversity students insist on 14 years of monitoring shows that: the Qinhuai water quality in recent years have improved The Qin Huai River water quality? In recent years, with or without a change? Resources and Environment College of Nanjing Agricultural College adhere to the 14 years of monitoring results show that the Qinhuai River every year, but visitors can not see the place dirty. According to reports, the Resources and Environment College of Nanjing Agricultural College from 1999 to start the Qinhuai green line "summer social practice activities, during the summer months will Qinhuai Sanchahe, Pasture Gate Bridge, cool Bridge, Stone, three-Hill Bridge, crane bridge water point sampling of 16 monitoring points, pH, total nitrogen, total phosphorus, chemical oxygen demand (COD), turbidity of the water were measured. The monitoring report shows that in 14 years, both inside and outside Qinhuai the water quality in recent years is gradually changed for the better. For example in chemical oxygen demand COD COD value of the greater body of water contamination in the more serious. In 1999, measured Qinhuai COD value of 53.32 mg / l in 2001 to 36.59 mg / l in 2004 to 27.18 mg / l in 2008 to 20.46 mg / l, and this year was 17.496 mg / l; look outside the Qin Huai River, from 1999 to 2012, the COD value decreased from 50.61 mg / L to 26.131 mg / l. The total nitrogen content of total phosphorus is also a measure of water pollution indicators. Outside the Qinhuai of total nitrogen increased from 2009 to 0.85mg / L dropped to 0.305 mg / l total phosphorus decreased from 0.179 mg / l to 0.153 mg / l. The Qinhuai outside Qinhuai water quality is better than the Qin Huai, Eutrophication has improved. "Nanjing agriculture university 2012" the Qinhuai environmental line "summer social practice captain Zheng Chu Chu Jieshao. By The survey also found that visitors to see the place is relatively clean, the other place was dirty. The Qinhuai pollution sources to sewage, organic pollution is still more serious, especially within Qinhuai. I am an expert from balljointbearings.com, while we provides the quality product, such as Deep Groove Ball Bearings , China KOYO Bearing, Angular Contact Ball Bearing,and more.
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