水体大气复氧理论和复氧系数研究进展与展望

Advances and prospects in the research of water reaeration theory and reaeration coefficient

作者对水体大气复氧理论和复氧系数计算公式研究进行总结 ,分析了水体在静止和紊动水流条件下大气复氧的理论模型和复氧方程 ,并对计算复氧系数的公式的适用范围进行分析 ,概括了水体大气复氧方程的基本形式。各复氧系数计算公式大多是基于各自的水力条件 ,忽略了其他的因素而不能应用于所有的河流 ,因此可靠性较差 ,但相对而言 ,其中以Thackston

The current research on theory of water reaeration and reaeration coefficient is summarized.Theories for reaeration in static and turbulent water body suggested by various researchers are introduced and analyzed.It is pointed out that the model for static reaeration obeys the molecular diffusion theory and the process of reaeration is the momentum exchange of oxygen molecular at the interface between gas and fluid. The reaeration coefficient formulas corresponding to different theories are presented. At present, the accuracy of formulas calculating the reaeration coefficient is low. It is proposed that to reasonably select the suitable formula according to the relevant conditions is very important. In view of the need of further research on the theory of reaeration, a proposal including the establishment of a lab for study on dynamic simulation of reaeration is suggested.