Explanation:
. It is strongly impacted by runoff from rain events. This is easily observed by the eye during and after storms when streams and rivers are very cloudy and look brown. When it rains, the dirt, animal waste, and other contaminants that build up on the surface of the ground or pavement are washed off into the streams and rivers. Though there is more water in the streams and rivers during storms, there are more contaminants as well.
