Groundwater.
artesian
artesian
artesian
Ground water.
artesian
artesian
artesian
artesian
artesian
Most of the earths surface is covered with water. There is land under that water though, below the surface.
The pressure exerted by rock layers above and below an aquifer that forces water to rise to the Earth's surface is called "hydrostatic pressure." This pressure is a result of the weight of the overlying rock and water, which can lead to artesian flow if the aquifer is confined. In such cases, water can rise spontaneously to the surface through wells or natural springs without the need for pumping.
This process is called water table rise, which occurs when heavy rainfall saturates the ground with water, causing the water table to rise. Excessive water accumulation can lead to flooding and potential water damage to properties on the surface.