水体自净的耗散结构特征

THE CHARACTER OF THE DISSIPATIVE STRUCTURE IN SELFPURIFICATION OF WATER BODY

本文用耗散结构的理论解释了河流的水体自净问题，利用Ｓｔｒｅｔｅｒ－ｐｈｅｌｐｓ的ＢＯＤ／ＤＯ水质模型，讨论了河流的稳定性，并指出耗氧速率常数Ｋ１同温度、污染物性质和时间有关。最后得出结论：①在利用河流水体自净进行污染物处理时，必须充分考虑环境容量的大小；②在临界点附近进行人工处理，其效果最好。

The article explains the selfpurification in river water body by applying the dissipative structure theory,makes use of the model of BOD/DO water quality put forward by streeterphelps to discuss the stabilize of river,and shows the coefficient K1 is related to temperature,time and character of pollution.Finally,we conclude 1.When making use of the selfpurification of river,we must fully consider the environmental capacity.2.Nearby the critical point,the effect of artificial disposal is best.