A river’s drainage basin is defined as the area of land where precipitation collects and drains off, … See more

The longer a river system gets, the more terrain it passes through. It comes as no surprise then that the longest rivers are supported by immense drainage basins. Here are th… See more

The fact that huge population centers sit at the terminuses of many of these key rivers is a testament to how important watersheds are to our survival. Only 10% of the global population l… See more