At bottom layer of the moutn of the Huanghe River the AOU (Apparent oxygen utilization) is as high as 2.04ml/L in summer, as a result of the oxidation of organic matter adhereing on suspended matter.

• 夏季；黄河口门底层水的表观耗氧量高达2.；04ml?L。 反映了黄河悬浮物所携带的有机物氧化的结果。