龚嘴水电站自运行以来，尾水位的抬高一直威胁着厂房(指地面厂房)的消防安全。
Since Gongzui Hydropower Station put into operation, the tail water level always threaten the flood control safety against pow er-house (in di cating powerhouse on the ground).
当水电站尾水位高于厂房地平面时，如果尾水闸门不能止水，势必影响电站的检修和安全。
When the tail water level is higher than the ground of a hydro-power plant, the repairing and safety of the plant will be affected without water seal in the tail gate.
当下游水位最低时，尾水管进口真空变化最明显，随着下游水位的上升，尾水管进口真空度逐渐改善。
The vacuum degree at tailrace adit varies most significantly at the lowest downstream water level and improves gradually along with the rising of downstream water level.
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