During rainy monsoon or flood seasons, it often creates pools of stagnant water and dam water levels are lowered in order to avoid dam flooding.

多雨的季风或洪水季节，往往造成积水和大坝的水位池降低，为了避免坝洪水。

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Effects of column length and buffer constitution on separation have been discussed. Anions in well water, dam water. tap water and snow water have been fast identified.

考察了柱长和洗脱液组成对阴离子分离的影响，并对井水、坝水、自来水和雪水中无机阴离子进行了快速分离。

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In 1996, scientists caused an experimental flood of the Colorado River by releasing water from Glen Canyon Dam above the Grand Canyon.

1996年，科学家从大峡谷上方的格伦峡谷大坝放水，造成科罗拉多河实验性洪水。

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It cannot be changed. The expression comes from the idea that water that has fallen over a dam cannot be brought back again.

VOA: special.2009.05.10

Water over the dam is an expression about a past event.

VOA: special.2009.05.10

You say it is water over the dam.

VOA: special.2009.05.10

Built in the 1920s, the Tamiami Trail is a road that cuts the Everglades in half and acts like a dam blocking water flow from the north to Everglades National Park in the south.

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But one official, Wang Jingquan of the Yangzi's Water Resources Committee, conceded that the dam had lowered water levels in two of the country's biggest freshwater lakes, making the impact worse.

ECONOMIST: China and opposition to dams

Uzbekistan fears the dam will restrict water supplies to its main cash crop, cotton.

BBC: Tajikistan accuses Uzbekistan of economic blockade