The plant species with high propagation capability and growth rate had the advantage in competition, which ensured their survival in the water-levelfluctuation zone.
高繁殖力和高生长率的物种在竞争中具有优势，确保其能在消落带生存。
2
The tailrace surge chamber shared by two units , common in hydropower stations with diversion systems , has problems of waterlevelfluctuation and hydraulic disturbance.
The characteristics of fluid flow in the mould of two ports SEN and four ports SEN have been compared and the influences of SEN on the levelfluctuation are investigated by water modeling experiment.