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Just so, what are floodgates used for?
Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems.
Subsequently, question is, what happens when a dam is opened? Every dam is built to store certain amount water. In the rainy season more water flows in. The gates are opened to allow the excess water to flow out. If the water overflows the main dam then the current can cause erosion of dam and weaken it.
Subsequently, one may also ask, what does it mean to close the floodgates?
Definition of floodgate. 1 : a gate for shutting out, admitting, or releasing a body of water : sluice. 2 : something serving to restrain an outburst opened the floodgates of criticism.
What does it mean to open the floodgates?
If an action or a decision opens the floodgates, it allows something to happen a lot or allows many people to do something that was not previously allowed: Officials are worried that allowing these refugees into the country will open the floodgates to thousands more.