a river doesnt drink its own water

 A river is a large natural stream of water flowing in a generally downhill direction. Rivers are found on every continent and make up some of the longest and most iconic waterways in the world, such as the Nile, Amazon, and Yangtze. Though they may seem endless, rivers are actually finite systems. They rely on a continuous input of water from precipitation, and they eventually discharge that water into another body, such as another river, a lake, or the ocean. This means that a river doesn't actually drink its own water—the water that flows into it is constantly replaced by new water. In this way, rivers are constantly renewing themselves, even as they flow ever onward.