Editing Hydrogeology of Sudan

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||Water quality is generally brackish.
 
||Water quality is generally brackish.
 
||Recharge is low.
 
||Recharge is low.
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||Low to Moderate Productivity
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||This group includes all the small outcrops of Palaeozic sedimentary rocks in western Sudan. They do not form major aquifers, and little is known about them. Aquifer productivity is likely to be low and groundwater flow and storage only through fractures.
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==== Consolidated Sedimentary - Intergranular Flow: Nubian Sandstone Aquifer====
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{| class = "wikitable"
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|Named Aquifers||Aquifer Productivity||General Description||Water quantity issues||Water quality issues||Recharge
 
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|Nubian Sandstone Formation
 
|Nubian Sandstone Formation
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||Groundwater quality is generally fresh, although salinity increases down-gradient and there are local pockets of higher salinity.  
 
||Groundwater quality is generally fresh, although salinity increases down-gradient and there are local pockets of higher salinity.  
 
||Recharge occurs by  direct rainfall infiltration and via wadi runoff, and occasionally via leakage from the Nile rivers. Annual recharge to the Baggara basin is estimated at 30 million m³, and to the Bara basin esatimated at 15 million m³.
 
||Recharge occurs by  direct rainfall infiltration and via wadi runoff, and occasionally via leakage from the Nile rivers. Annual recharge to the Baggara basin is estimated at 30 million m³, and to the Bara basin esatimated at 15 million m³.
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||Low to Moderate Productivity
 
||This group includes all the small outcrops of Palaeozic sedimentary rocks in western Sudan. They do not form major aquifers, and little is known about them. Aquifer productivity is likely to be low and groundwater flow and storage only through fractures.
 
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