引黄前后汾河上游水质变化对比分析

The Comparative Analysis the Water Quality Changes of Fen River Upstream Region before and after the Yellow River Inpouring

根据汾河上游区域1985～1995年水质资料,采用单因子评价方法和水质指数法,对汾河上游沿途进行取样分析。结果表明:在2003年黄河水进入前后,汾河上游污染物浓度和种类有一定变化,主要表现在水质类别大多从Ⅱ、Ⅲ类上升为Ⅳ类以上;黄河向汾河输水期间沿程水质化学需氧量、氨氮及高锰酸盐指数从喇嘛湾—万家寨水库—汾河头马营口—宁化—东寨—河岔—汾河水库均呈明显下降趋势;东寨水质好于其他取样点。

The water quality data of Fen River upstream region during 1985-1995 was used.The Fen River water samples which along the way of the upstream region were analysed by the single-factor evaluation and water quality index methods.The results showed that the concentrations and types of pollutant were changed after the Yellow River water entered the upstream region in 2003 and mainly showed the water quality categories changed from the Ⅱ,Ⅲ to above Ⅳlevel.The chemical oxygen demand,ammonia nitrogen and permanganate were declined along the Lama Bay-Wanjiazhai-Mayingkou-Ninghua-Dongzhai-Hecha-Fen reservoirs.The water quality of Dongzhai was better than the other sampling sites.