How do gravity dumps function to empty water from a tank?

Gravity dumps function by utilizing gravitational pull to empty water from a tank. This method does not require additional mechanical devices such as pumps or jets. Instead, when the outlet is opened, the force of gravity causes the water to flow downward and exit the tank naturally. This is an efficient and straightforward way to release water without the need for energy-intensive equipment.

The reliance on gravitational pull means that the operation is simpler and can often be more reliable, especially in emergency situations where power might not be available. The other options, such as the use of pumps or mechanical forces, do not apply here, as gravity dumps specifically leverage the natural force of gravity to facilitate the flow of water.