Return to Table of Contents Sources and Mechanisms of Groundwater Contamination Groundwater is an important part of the water cycle, which begins with precipitation falling on the earth's surface.
(Return to Table of Contents Sources and Mechanisms of Groundwater Contamination Groundwater; is; an important part of the water cycle) (the water cycle; begins; with precipitation falling on the earth's surface) (precipitation; falling; on the earth's surface)
Return to Table of Contents Sources and Mechanisms of Groundwater Contamination Groundwater the water cycle precipitation
is begins falling
an important part of the water cycle
with precipitation falling on the earth's surface
on the earth's surface