该负责人同时提醒广大市民，由于目前湘江流量偏少，湘江水的自净作用减弱，因而水质会有一定影响。
The official also reminded the general public, less than normal due to the current flow of the Xiangjiang River, Xiangjiang reduced self-purification of water, so water will have some impact.
绘制了自净曲线，计算了自净百分率和自净速率常数，并讨论了温度、河水流速及浊度对自净作用的影响。
Self-purification curves are presented, percentages and rate constants of the purification are calculated, and influence of temperature, flow rate, and turbidity on self-purification are discussed.
悬浮物中汞以腐殖质结合态为主，这与腐殖质对汞的螯合能力甚强，能对汞污染起自净作用有关，这对汞污染治理有参考价值。
Mercury in suspended matter is dominated by mercury bound to humus, because the strong combining ability of humus, this can be reference for mercury pollution harness.
水污染物的总量控制是建立在天然水体对污染物具有稀释扩散和自净作用理论上，即天然水体对污染物具有一定环境容量的基础上。
Total emission control of water pollutants is based on natural water dilution of pollutants and autopurification theory, in another word, natural water has some environmental capacity on pollutants.
由于山溪与河流的水文和地质条件不同，所以它们对有机污染物的自净作用机理也很不一样。
Mountain streams are different from common rivers in hydrological and geological features. So different also are their self - purification mechanism to organic pollutants.
因为污染物除随河水流动方向流动以外，还会向河水流动不同方向扩散。污染物也可能由于水体的自净作用而在流动过程中逐渐消失。
Due to the diffusional effect, the pollutant will flow not only towards the down-stream, but also in other directions, including the direction against the flow stream.
因为污染物除随河水流动方向流动以外，还会向河水流动不同方向扩散。污染物也可能由于水体的自净作用而在流动过程中逐渐消失。
Due to the diffusional effect, the pollutant will flow not only towards the down-stream, but also in other directions, including the direction against the flow stream.
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