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Nemechka/Vjosa-Pogoni Aquifer - 136

Albania - Greece (connected to the Aoos/Vjosa River basin surface waters)

The Nemechka/Vjosa-Pogoni Αquifer is made up of a succession of large anticlines containing karstic limestones of mainly Jurassic and Cretaceous age and synclines with formations of Palaeocene and Eocene flysch. The complicated geological structures and hydrogeological conditions which bring these formations together produce large karst springs; groundwater discharges
towards both countries. The links to surface waters are weak.

Aquifer type 1

State border follows surface water catchment and groundwater divide, little transboundary groundwater flow.

 

Nemechka/Vjosa-Pogoni ΑquiferAlbania
Greece
Area (sq. km) 550 370
Thickness: mean, max (m) 2500, 4000 100, 150
Groundwater uses and functions 25-50% irrigation, <25% each for drinking water
supply, livestock and industry, maintaining baseflow
and springs and supporting ecosystems.
25-50% irrigation, <25% each for drinking water
supply and livestock, maintaining baseflow
and springs and supporting ecosystems.
Pressure factors Minor waste disposal and sewer leakage result in
local and moderate pathogen occurrence.
Agriculture; pumping lifts have increased
locally; sulphate concentrations of 300-800
mg/l observed in many of the springs.
Groundwater management Need to be applied: detailed hydrogeological and vulnerability
mapping, groundwater monitoring, public awareness,
delineation of protection zones and wastewater treatment.
Existing monitoring needs improvement.
Other information Border length 37 km. Large karst groundwater quantities
(average about 8 m3/s) discharge into the Vjosa River
gorge in Albanian territory. There are also other large
karst springs; the Glina sulphate spring is a well-known
karst spring for bottled water. The aquifer is not at risk.
Border length 37 km. Large spring discharges
of Kalama, Gormou and Drinou