博斯腾湖大湖区环境因子动态分析研究

为促进干旱区湖泊健康发展,分析了博斯腾湖大湖区湖水多年溶解氧与五日生化需氧量、高锰酸盐指数、总磷、总氮和氨氮的动态特征:1991年-2014年(2009、2012除外)水体溶解氧为6.71~9.20 mg/L,最高值与最低值分别在2005年和2006年,此与2005年水位最高,而后下降的特征一致;五日生化需氧量在0.5~6.99 mg/L变幅较大,并与溶解氧同年出现最高值,且二者符合线性回归关系y=0.213x+7.053;高锰酸盐指数波动明显;总氮和总磷则较平稳;氨氮从0.01 mg/L升至最高值0.45 mg/L.高锰酸盐指数和总氮对水质影响最大.

Analysis on Dynamic Environmental Factors in Bosten Lake in Recent 20 Years

For the sustainability of lakes in arid area, this paper takes the open water region from Bosten Lake as a example to analyzes the dynamics of 6 water quality indices, include DO, BOD5, CODMn, TP, TN and NH3 -N.The results indicate that DO varies between 6.71 mg/L and 9.20 mg/L.Its minimum and maximum happen in 2005 and 2006, respectively.This is con-sistent with the highest water level in 2005 from its history.BOD5 has its maximum in the same year with DO.It drastically chan-ges from 0.5 mg/L to 6.99 mg/L.They show a significant positive linear correlation and accord with such an equation that is y=0.213x+7.053.CODMn changes sharply up and down.However, TN and TP are smooth and steady.NH3 -N leaps between 0.01 mg/L and 0.45 mg/L But CODMn and NH3 -N are only to the third or the forth of it.