Groundwater lies in the ground. The water gets there when it has rained or snowed. Water can also seep from a lake or a river, which also gives groundwater. The water seeps through the ground until it reaches a layer that does not allow water to pass through. This is usually a rock or a layer of clay. The water can be stored there for many thousands of years.
The material through which the groundwater flows is called aquifers or aquifers. It can be humus, gravel or a similar material that is permeable to water. Typically, the water percolates downward or slants to the side because of gravity. When it resurfaces, a spring is formed.
However, groundwater can also be forced upward. Often this happens because of heat. But it also happens when rock masses shift, making space tight. Groundwater that comes from the depths is warm.