Explanation:

In Punjab, the land between two rivers is known as doab and accordingly the region between Ravi and Beas is known as Bari Doab. Upper Bari Doab Canal, which originates at Madhopur near Pathankot, derives its name from it. It was the first canal to be dug up in Punjab for irrigational purpose; however, at that time it was simply known as Bari Doab Canal system. The prefix ‘Upper’ was added only when a second canal known as Lower Bari Doab Canal was dug.