As a lahar rushes downstream from a

As a lahar rushes downstream from a volcano, its size, speed, and the amount of water and rock debris it carries constantly change.The beginning surge of water and rock debris often erodes rocks and vegetation from the side of a volcano and along the river valley it enters.This initial flow can also incorporate water from melting snow and ice (if present) and the river it overruns. By eroding rock debris and incorporating additional water, lahars can easily grow to more than 10 times their initial size.But as a lahar moves farther away from a volcano, it will eventually begin to lose its heavy load of sediment and decrease in size.