
Reservoir
Physical Storage
Refers to physical places where materials like water or oil are stored for use.

The new dam will create a vast reservoir for irrigation purposes.
Controlled Release
A reservoir usually implies controlled release or usage of what it stores.

They opened the reservoir gates to prevent flooding after heavy rainfall.
Artificial vs Natural
Can be man-made, like a water tank, or natural, like a lake used as a water source.

The natural reservoir feeds the entire ecosystem with fresh water.
Compare with
BasinCisternContainerHoldLakePondStorageTankWell
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