Such a pool is called a hot spring.
It collects as groundwater below the surface.
A natural spring
The Earth's surface, where it is not water, is called the ground.
Topography
Ground Water!
This is known as a hot spring. This process is one source of geothermal energy.
It collects as groundwater below the surface.
Surface water collects in a watershed and seeps into ground
Surface water collects in a watershed and seeps into the ground
Water in rocks (or other porous material) below the ground is called ground water.
The water on the surface of the ground, or water that is not ground water (water underground) that collects in lakes, rivers, streams or oceans. See the related links for more information.
A natural spring
The part of a plant that collects water (and nutrients) from the soil (ground) is called the root ([Plural] - roots). The outside surface of the root is the epidermis. Surface (epidermal)cells on the epidermis absorb water and nutrients from the surrounding environment and produce outgrowths called root hairs that greatly increase the cell's absorptive surface, allowing it to absorb more water. The process by which water is absorbed into the epidermal cells from the soil is known as osmosis. For this reason, water that is saline (contains salt) is more difficult for most plant species to absorb.
The Earth's surface, where it is not water, is called the ground.
The natural well works in a very simple way. The natural well taps into the ground water and brings it to the surface.
Water Table
Water collects underground by slowly seeping through the ground until it reaches hollows of the earth where it can collect. These are often called aquifers and are major sources of water for cities.