Monday marked the 10th time it has been opened since the structure was completed in 1931. The spillway diverts water from the Mississippi River to Lake Pontchartrain.
周一是它自从1931年落成之后第十次被打开，泄洪闸使密西西比河的水流向庞恰特雷恩湖。
2
Therefore, study on the hydraulic characteristics of spillway, especially on aerated flow, becomes more and more important for safe operation of outlet structure.
因此，开展溢洪道水力特性，特别是掺气水流特性的研究对泄水建筑物的安全运行具有重要的现实意义。
3
The three dismensional structure of spillway entrance has an important effect on the flooding ability.