Question

what is water divide

Answer 1

A divide is the elevated boundary separating areas that are drained by different  water
systems. For this reason, the feature is often called a drainage divide. Water flowing on one side of a divide empties into one body of water, while water flowing on the other side empties into another

Answer 2

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Any elevated area such as mountain elevated area such as mountain or upland which separate two drainage basin is known as water divide.
For example- Ambala is located on the located on the water divide between the Indus and the Ganga River system.

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