They regulate the flow of water by the sluice gate.

他们用水闸门控制水的流量。

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The underflow energy dissipation is a commonly used type for sluice gate, and the apron is an important component of energy dissipation structure.

底流式消能是水闸常用的消能方式，海漫是其消能结构的重要组成部分。

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As soon as the sluice gate was opened, the water surged in.

水闸门一开，水便一下子涌了出来。

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People living near Portavoe Reservoir outside Donaghadee have claimed that water levels have dropped recently after a sluice gate was left open.

BBC: dead fish