摘要
污染物在水体中的扩散规律研究已引起越来越多人的关注。通过现场扩散示踪实验求得扩散系数，进而对污染物的扩散规律予以定量描述，是一种可靠易行的方法。对黄河托克托至河曲段的实际研究表明，以Ｃｒ２Ｏ或Ｆ－为示踪剂，运用Ｔａｙｌｏｒ模型进行多沙大河的污染物扩散规律研究可以取得满意的结果。同时，利用现场示踪实验结果与经验公式的结合可以预测不同情况下的纵向扩散系数，从而得出污染物的允许排放量，这将有利于污染物在水体中行为的深入研究。
The study on the dispersion of pollutants in waters has attracted more and more con-cern. In order to quantitatively describe the dispersion of pollutants, the dispersion coeffi-cient must be obtained by means of lield experiments. By using Cr2O2-7 or F- as tracers andTaylor medel to study the dispersion of pollutants in muddy rivers , satisfactory results wereacquired , as shown in the study on Tocto to Hequ reaches of the Yellow River. At the sametime, the field tracer experiment results combine with empirical equation could be used topsedict longitudinal dispersion coefficients in different circumstances, froni which thepesmissijble discharge of pollutants can be calculated. This will facilitale the further study onthe behavior of water pollutant.
关键词
河流
扩散示踪
污染物
river
dispersion of pollutants
