backwater height in front of bridge

例句：

1. 1.The engineer measured the backwater height of the dam to ensure its stability.
   工程师测量了大坝的回水高度，以确保其稳定性。
2. 2. The backwater height is a critical factor in determining the efficiency of the system.
   回水高度是决定系统效率的关键因素。
3. 3. The backwater height was reduced by 50% due to the new design.
   由于新设计，回水高度减少了50%。