嘉陵江河口段枯水期水质分析

对嘉陵江河口段2010年2,3,4月枯水期选取总磷(TP)、叶绿素a(Cha)含量、pH值、溶氧量等作为指标进行水质检测分析。结果表明:随着降雨量的持续减少、气温的回升、蒸发的加快、水位的下降等使得干旱期嘉陵江富营养化有加重的趋势。4月份嘉陵江降雨增加、旱情有所缓解,各项指标出现一个相对稳定的下降,同时在温度上升、营养盐输入等大环境的影响下各富营养指标会有一个相对稳定的上升。三峡大坝建成后富营养化成为水环境突出问题之一,特别是对干旱期内嘉陵江富营养化应引起足够重视,加强监督保护嘉陵江生态相对稳定。

Selecting total phosphorus （TP）, chlorophyll-a （Chl-a） content, pH value and DO as water quality indexes, the water quality of Jialing river estuary section during dry period （February, March, April） in 2010 was detected and analyzed. The results showed： with continuous decrease of rainfall and temperature rising, speedy evaporation and lowering of water level, the eutrophication of Jialing river was aggravated in dry season. But in April, Jialing river rainfall began to increase, it caused the various indexes to appear a stable decline relatively; at the same time, the eutrophication indexes appeared a stable rising relatively with temperature rising and nutrient input. Eutrophication has become one of outstanding water environment problems after the completion of the Three Gorges Dam. Entrophication of Jialing river in dry period should be pay enough attention, supervision and protection should be strengthened for maintaining the ecological stability of Jialing river.