Generally, rivers follow a downhill course due to the gravitational pull of the Earth. The majority of the planet's rivers arise in the mountains and are bound in a downstream, southerly direction.
A river usually starts as a small trickle of water that eventually increases in volume as more water is added to it. Torrential rains and melted snow often contribute to a rise in a river's water level, as well as the various tributaries that join with the river along its course. A river that flows over a slope and crisscrosses across land is called a "meandering river," while a river that contains minor channels, which continually split and merge, is called a "braided river." A river empties into its mouth, typically an ocean or a lake.Learn More
Rivers form when flowing water from precipitation or springs flows over land and accumulates in existing low points in the topography, eroding it and forming a riverbed. Rivers are channels for moving water, which always seeks to flow downhill, and indeed, many rivers start from small channels in mountains. As it erodes the landscape, different aspects of the interaction between flowing water and the ground cause winding and branching.Full Answer >
Three main rivers in Italy are the Po, Adige and Tiber Rivers in terms of length and drainage area. The Po River is 652 kilometers long and has a drainage area of 70,091 square kilometers. The Adige is 410 kilometers long and has a drainage area of 12,200 square kilometers.Full Answer >
Rivers are important to people primarily because they serve as the driving forces of the water cycle that continuously provides the planet with a sustainable supply of freshwater, which is essential for the people's survival. These bodies of water also form the natural habitat for various organisms, often utilized by human beings as food sources.Full Answer >
Potholes form at the bottom of rivers as eddies gouge out the bedrock of the river bottom. These eddies form as isolated whirlpools break off from the main current of the river. If the whirlpool pattern is persistent, it can dig permanent irregularities in the rock that form the initial conditions for further erosion of the pothole.Full Answer >