The underground flow of water is more common than surface run-off in limestone areas. Why?

 Question.

The underground flow of water is more common than surface run-off in limestone areas. Why?

Answer. 

Groundwater flow is more common than surface water flow in lime-rich rock regions due to the following reasons:

  • In limestone areas, surface rocks are highly permeable, thin-bedded, and cracked, allowing surface water to seep into the underground easily.
  • Limestone rocks are mainly composed of calcium carbonate which is soluble in the water allowing water to pass through it.
  • Due to the above two reasons surface water sips easily underground and in limestone areas, there are hard rocks at some depth which helps the groundwater flow. For this reason, the groundwater flow is found more common than the surface water flow in the lime-rich rock regions.

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