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.%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.
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