1. What percentage of Earth's total freshwater supply is groundwater? 2. What share of Earth's liquid freshwater is groundwater? 3. List two geologic roles that groundwater plays. 4. What share of U. S. freshwater is provided by groundwater? What is most groundwater used for?

For about 14.6% of the Earth's Fresh water supply comes from ground water. The share of the liquid fresh water of the Earth that accounts for ground water is about 94.05%. The two geological roles of ground water are given below: It acts as an erosional agent. It acts as a stream flow equalizer, i. e., it is a sort of storage form in order to provide sustainability to the streams during dry periods. For about 23% of U. S fresh water is provided by ground water. Most of the ground water is utilized for irrigation purposes.