▁which ▁ 3 4 0 9 ▁million ▁cub ic ▁meters ▁is ▁sur plus ▁to ▁the ▁aqu ifer ▁capacity . ▁This ▁def ic it ▁in ▁the ▁volume ▁of ▁the ▁aqu ifer ▁res erves ▁has ▁led ▁to ▁a ▁long - term ▁ground water ▁level ▁drop ▁of ▁ 4 1 ▁cent im eters ▁a ▁year , ▁on ▁average . ▁In ▁the ▁free ▁regions , ▁the ▁number ▁of ▁well s , ▁q an ats ▁and ▁spr ings ▁amounts ▁to ▁ 2 4 1 , 0 9 1 ▁with ▁an ▁output ▁of ▁ 3 7 , 5 2 7 ▁million ▁cub ic ▁meters ▁a ▁year . ▁Therefore , ▁in ▁ 2 0 0 5 , ▁in ▁the ▁country ▁as ▁a ▁whole , ▁there ▁were ▁ 1 3 0 , 0 0 8 ▁deep ▁well s ▁with ▁a ▁dis charge ▁of ▁ 3 1 , 4 0 3 ▁million ▁cub ic ▁meter , ▁ 3 3 , 8 0 4 1 ▁semi ▁deep ▁well s ▁with ▁a ▁dis charge ▁of ▁ 1 3 , 4 9 1 ▁million ▁cub ic ▁meters , ▁ 3 4 , 3 5 5 ▁q an ats ▁with ▁a ▁dis charge ▁of ▁ 8 , 2 1 2 ▁million ▁cub ic ▁meters , ▁and ▁ 5 5 , 9 1 2 ▁natural ▁spr ings ▁with ▁a ▁dis charge ▁of ▁ 2 1 , 2 4 0 ▁million ▁cub ic ▁meters . ▁ ▁Ab ▁an bar ▁ ▁Ab ▁An bars ▁have ▁a ▁long ▁history ▁in ▁Iran , ▁and ▁there ▁are ▁still ▁some ▁ab ▁an bars