Why does a plume of contamination spread out (become wider)away from the source of contamination?
A)because the water flows faster and faster
B)because of diffusion of the contamination and mixing of contaminated and uncontaminated water
C)it does not spread out away from the source
D)it will only spread out if it is close to a cone of depression

Question

Why does a plume of contamination spread out (become wider)away from the source of contamination? 
A)because the water flows faster and faster 
B)because of diffusion of the contamination and mixing of contaminated and uncontaminated water 
C)it does not spread out away from the source 
D)it will only spread out if it is close to a cone of depression

Quizplus · Accepted Answer

The plume of contamination spreads out away from the source due to a combination of diffusion of the contamination and mixing of contaminated and uncontaminated water. As the contaminated water moves away from the source, it begins to mix with the surrounding clean water, which causes the contamination to spread out and become more dilute.

Why Does a Plume of Contamination Spread Out (Become Wider)away