self-purification of water body 水体自净 ; 自净作用
self-purification of water bodies 水体自净
biological self purification of water 水体生物自净
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.
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。
It was a quantitative target for describing of self-purification capacity of water environment of area.
它是描述一个地区水环境自净能力大小的定量指标。
To improve the self-purification ability and pollution situation of river water, control the pollution load and ensure the river basic flow are two important ways.
在控制污染负荷排放的同时，也要保证河流基本流量，提高水体自净能力，改善渭河水体的污染现状。
应用推荐