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#Thread on India's #CarbonateAquifers:
Aquifers may be divided as unconsolidated (alluvial) or consolidated (hard-rock).
Among the consolidated - carbonate aquifers (made of Limestone/Dolomite) are special, as they are often very productive. Map - Shah et al (2018).
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Aquifers may be divided as unconsolidated (alluvial) or consolidated (hard-rock).
Among the consolidated - carbonate aquifers (made of Limestone/Dolomite) are special, as they are often very productive. Map - Shah et al (2018).
#Retweet
Limestone often dissolves in the groundwater (a process called karstification), creating much more space & hydraulic conductivity. Space for water is denoted by Specific yield = % of vol of water/rock.
@CGWB_CHQ here gives values for Specific Yield for as carbonates 2-15%:
@CGWB_CHQ here gives values for Specific Yield for as carbonates 2-15%:
Some widely used carbonate aquifers are in Chhattisgarh, Cuddapah & Vidhyan sedimentary basins; and in Kashmir.
Kashmir is famous for prolific springs ('nags') some of which discharge at over 3000 lps! These are basically underground rivers curring through limestone like butter.
Kashmir is famous for prolific springs ('nags') some of which discharge at over 3000 lps! These are basically underground rivers curring through limestone like butter.
