The big door provided in the dam for the water discharge is called sluice gate
standing suface water.
Any dam will raise the water level behind it.
A barrage is a type of dam that uses gates to control the level of water. They were built to divert water or to dam a lagoon.
a dam
One time a Dam man went to drink the Dam water. He was all out of Dam water so he went and got his Dam bucket to fill it up with Dam water from the Dam well. His Dam well was empty, so he went to another Dam man to get Dam water. He asked the Dam man," Can I have some Dam water, Please?" The Dam man Replied, "Get your own Dam water!"
Potential energy stored in water.
There are 64 sluice gates and 34 crest gates at the Hirakud dam for discharge of excess water, officials said.
A dental dam
The Aswan dam is an embankment dam.
Hoover Dam is what is called an arch-gravity dam. The name curved-gravity dam or arched dam might also be applied. This type of dam uses a curve or arch which has it's apex or "top" directed ''against'' the force of the water it is retaining. This sets up a condition wherein the water will compress the dam against the sides to which it is anchored. Less material fill is required to hold this dam in place compared to a simple gravity dam. Use the link below to learn more. Another link will show lots of images of this and other dams of the same type.
Arch dam