Source: IE
Context: In December, artesian water flow in Taranagar, Jaisalmer, Rajasthan, revealed unique geological features, dispelling myths like the Saraswati River.
About artesian condition:
- Definition: An artesian condition occurs when groundwater is confined under pressure between layers of impermeable rocks, called an artesian aquifer.
- Factors leading to artesian condition:
- Confined aquifer: Water trapped between impermeable rock layers.
- Pressure gradient: Natural geological pressure caused by the weight of overlying impermeable layers.
- Rupture or Drilling: Release of pressure when the top layer is punctured (e.g., during drilling).
- How it works:
- Artesian water flows naturally to the surface when the confining layer is breached, propelled by the internal pressure.
- The water may gush out forcefully, depending on the depth and pressure within the aquifer.
- Significance:
- Water Source in Arid Regions: Provides access to groundwater in deserts like Rajasthan.
- Geological insight: Reveals subsurface hydrogeological conditions.
- Agricultural utility: Enables irrigation without pumping in confined aquifers.
- Global examples: Found in Australia, Africa, and historical wells like Artois in France.
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