生态河道种植圈对水流水力特性的影响

Influences of cropping loops in ecological river on hydraulic behavior of flow

采用三维超声波多普勒测速仪对河道生态修复中种植圈布设前后的工况量测,比较了布设种植圈前后的流速分布、紊动强度和雷诺应力的变化.结果表明,布设种植圈后,纵向流速分布波动明显,相对紊动强度和雷诺应力均略有增加.

By using the three-dimension acoustic Doppler velocimeter to measure velocities of flow in an ecological river before and after arrangement of cropping loops, the velocity distribution, turbulence intensity and Reynolds stress before and after arrangement of cropping loops are compared. Results show that the longitudinal velocity distribution fluctuates significantly, and that the relative turbulence intensity and Reynolds stress have a little increase.