bottom flushing of sediment

例句：

1. 1.The bottom flushing of sediment is crucial for the stability of riverbeds.
   底流冲刷沉积物对河床的稳定性至关重要。
2. 2.The bottom flushing of sediment plays a significant role in the formation of sandy beaches.
   底流冲刷沉积物在形成沙质海滩方面起着重要作用。
3. 3.The bottom flushing of sediment can cause significant changes in the water quality of coastal areas.
   底流冲刷沉积物可以导致沿海地区水质的显著变化。