A River That Flows Into Another River Is A What Are Underground Rivers?

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What Are Underground Rivers?

We are all familiar with the rivers that flow on the surface of the earth. But strangely there are some underground rivers too. Do you know how rivers form underground?

There are many reasons that give rise to underground rivers.

An underground river forms when the uppermost surface of the earth allows rainwater to flow easily into the denser soil structure. This water begins to flow under the pressure of the water above and takes the form of an underground river.

Water flow in rocks depends on two properties: porosity and permeability of the rock. Porosity is the fraction of a rock’s bulk volume that is made up of voids. Generally, ductile rocks are porous. Crystalline rocks are less porous. Permeability is a general term used to describe the extent to which fluids can flow through rock voids. It mainly depends on the size of the void. Ground water flows from the steepest slope.

Limestone rocks have tunnels and cones. An interesting process occurs when rainwater containing a certain amount of acid falls on them. Water begins to flow through their tunnels and caves looking for a way out. As the water moves forward, it erodes more and more of the surrounding rock to create long tunnels that eventually turn into underground rivers. These rivers surface at certain places and finally reach the sea.

This is another process by which an underground river is formed. When a powerful spring cannot emerge due to the compaction and compaction of rocks, it begins to flow underground.

The distance traveled underground by such a river varies. In some cases it is more and in others less. France’s famous Rhine runs a short distance underground. There is a famous underground river in Somerset (UK), speleologists have tried to follow the path of some underground rivers but many of the passages are too narrow. In this regard, some researchers have devised a procedure. It is recognized when it comes back to the surface by mixing a certain color with the river water.

Underground rivers form many deep caves and they are home to many unknown animals, most of the caves are formed by rainwater runoff, rivers. Some rivers flow directly into the ocean and some rivers go inland and then flow into the ocean.

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