Why does groundwater discharge to earth's surface?

The pie chart shows that about 1.7 percent of all of Earth's water is groundwater and about 30.1 percent of freshwater on Earth occurs as groundwater. As the bar chart shows, about 5,614,000 cubic miles (mi 3), or 23,400,000 cubic kilometers (km 3), of groundwater exist on Earth. read more

The hydrologic cycle depicts the ceaseless development of water above, on, and underneath the surface of the Earth. The water on the Earth's surface- - surface water- - happens as streams, lakes, and wetlands, and in addition narrows and seas. Surface water likewise incorporates the strong types of water- - snow and ice. read more