Evolution of river systems

By Sid Perkins, 13:52 PM March 18, 2014

A river’s erosion downward and across a landscape is based on a variety of factors, including terrain steepness and the arrangement of tributaries. In the March 7 Science, geophysicist Sean Willett of ETH Zurich and colleagues boiled down these factors into a single parameter called χ (the Greek letter chi), which typically becomes larger as distance from a river’s mouth increases. The scientists then calculated values for and mapped it for various river networks, including the southeastern ...

Source URL: https://www.sciencenews.org/article/evolution-river-systems