AQUIFER MAPPING PROJECT IN JAISALMER DISTRICT, RAJASTHAN
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Assessment Unit
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Block
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Name / Code
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Sam Block
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Area
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675 sq.km
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District
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Jaisalmer
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Taluk / Block
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Sam
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No. of Towns / Villages
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Approx. population in the Taluks
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Rural :
Urban :
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Figure 5.1: Aerial view of study area.
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Normal Annual Rainfall
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181.2 mm
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River Basin
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Indus (sub-basin : Barmer)
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Major rivers / streams
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Nil
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Geology
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Quaternary Alluvium underlain by Sandstones of Tertiary and Mesozoic.
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Hydrogeology
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Groundwater occurs under unconfined to confined conditions in Quaternary Alluvium
and in the underlying sedimentary rocks.
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Aquifers
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Sand layers in alluvium and clay-free beds & fractured zones in sedimentary rocks.
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Figure 5.2: Schematic views of the aquifer systems in the area.
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Depth to water table (Min. / Max.)
(m below ground level)
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Min. : 30 m Max. : >100 m
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Stage of ground water development |
60 % |
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Groundwater quality |
The area suffers from fluoride contamination and salinity at places. |
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Major issues |
- Deep aquifers with deep water levels
- Fluoride contamination and salinity at places
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Methodology of study |
Hydrogeology, integrated multiple geophysical surveys (including Heliborne survey), exploratory drilling and aquifer simulation. |
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Expected outcomes of aquifer mapping |
Map of alluvial and sedimentary aquifers, location of fresh water aquifers, interface of fresh and saline ground waters, optimal fresh ground water yield from wells. |
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Geographical applicability of the methodology |
Desert areas in other parts of Rajasthan and similar areas with Arid conditions. |
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