Last name meaning Ferris: This is an Anglicization of the Old Gaelic name O' Fearghusa - a compound of the Gaelic O (meaning grandson or male descendant) and the personal name Fergus, composed of the elements fear - a man and gus - vigour or force...
At other times, a confluence can be the location where two smaller streams or rivers merge to become the source for a new river. This is the case in Pittsburgh, Pennsylvania, where the Monongahela River and Allegheny River merge to create the Ohio River.
A watershed is an area of land in which all of the water that enters it, drains into a common waterbody. Also known as a drainage basin, it can be thought of as a funnel that collects surface water and ground water and drains it into a single stream, lake, ocean, or other reservoir.