中文摘要：

采用水槽试验和数值模拟相结合的方法，研究双方柱浮床3种布置形式（串列、并列和错开）对河流水动力特性的影响。结果表明：当浮床并列布置时，浮床几何中心所在横断面平均流速明显增大，浮床对下游影响较明显；在浮床所在水平面，串列、并列和错开布置的平均流速比无浮床布置时分别小1.12％、2.56％和4.24％；串列、并列和错开布置时浮床所在水平面相对紊动强度平均值与无浮床布置时相比分别增大30.3％、31.1％和7.2％，同时，并列布置对浮床下游的相对紊动强度影响最大。总体而言，错开布置对流速分布影响最大；并列布置对相对紊动强度影响最大，最有利于污染物扩散。

英文摘要：

A river’ s hydrodynamic characteristics , as affected by three types of arrangements （ tandem, juxtaposed , and staggered ） of double-square floating beds , were analyzed using both flume experiments and numerical simulation .The results show that the average velocity at the cross-section where the geometric centers of the floating beds were located increased significantly when the floating beds were in a juxtaposed arrangement , and the floating beds significantly influenced the velocity distribution downstream .With the tandem , juxtaposed , and staggered arrangements of the floating beds , the average velocities on the horizontal plane were , respectively , 1.12%, 2.56%, and 4.24% less than those without the floating beds , and the average relative turbulence intensities on the horizontal plane increased by 30.3%, 31.1%, and 7.2%, respectively , compared with the condition without the floating beds .Meanwhile, the juxtaposed arrangement of the floating beds significantly enhanced the relative turbulence intensity downstream .On the whole , the staggered arrangement of the floating beds had a more significant influence on the velocity distribution than the other two arrangements , while the juxtaposed arrangement increased the relative turbulence intensity more significantly than the other two arrangements , which would be propitious to pollutant diffusion in the river .