▁most ▁q an ats ▁due ▁to ▁low ▁precip itation ▁and ▁lack ▁of ▁permanent ▁surface ▁streams , ▁whereas ▁a ▁small ▁number ▁of ▁q an ats ▁can ▁be ▁found ▁in ▁the ▁northern ▁and ▁western ▁parts ▁which ▁receive ▁more ▁ra inf all ▁and ▁enjoy ▁some ▁permanent ▁rivers . ▁Res pect ively ▁the ▁provinces ▁K hor as an ▁Raz avi , ▁Southern ▁K hor as an , ▁Is fah an ▁and ▁Y az d ▁accommod ate ▁the ▁most ▁q an ats , ▁but ▁from ▁the ▁view point ▁of ▁water ▁dis charge ▁the ▁provinces ▁Is fah an , ▁K hor as an ▁Raz avi , ▁F ars ▁and ▁K erman ▁are ▁ranked ▁first ▁to ▁forth . ▁ ▁It ▁is ▁Henry ▁G ob lot ▁who ▁expl ores ▁the ▁gen esis ▁of ▁q an at ▁for ▁the ▁first ▁time . ▁He ▁arg ues ▁in ▁his ▁book ▁entitled ▁“ Q an ats ; ▁a ▁Te chni que ▁for ▁Ob tain ing ▁Water ” ▁the ▁ancient ▁Iran ians ▁made ▁use ▁of ▁the ▁water ▁that ▁the ▁min ers ▁wished ▁to ▁get ▁rid ▁of ▁it , ▁and ▁founded ▁a ▁basic ▁system ▁named ▁q an at ▁or ▁Kar iz ▁to ▁supply ▁the ▁required ▁water ▁to ▁their ▁farm ▁lands . ▁According ▁to ▁G ob lot , ▁this ▁innov ation ▁took ▁place ▁in ▁the ▁north west ▁of ▁the ▁present ▁Iran ▁somewhere ▁border ing ▁Turkey ▁and ▁later ▁was ▁introduced ▁to ▁the ▁neighbor ing ▁Zag ros ▁Mountains . ▁ ▁According ▁to ▁an ▁ins cription ▁left ▁by ▁S arg on ▁II ▁the ▁king ▁of ▁Ass y ria , ▁In ▁